Researcher Profile and Settings

Affiliation

• Research Faculty of Agriculture　Fundamental AgriScience Research　Bioresource and Environmental Engineering

Job Title

• Associate Professor

J-Global ID

• 200901032741396367

Research Interests

• resilience   Cold region   Arid area   リン   窒素   汚濁負荷   水質浄化   水質   排水路   農業水利   タリム河   土地利用   塩類集積   泥炭地   地域資源   

Research Areas

• Environmental science/Agricultural science / Rural environmental engineering and planning

Educational Organization

•  Bachelor's degree program　School of Agriculture
•  Master's degree program　Graduate School of Agriculture
•  Doctoral (PhD) degree program　Graduate School of Agriculture

Academic & Professional Experience

• 2022/04 - Today Hokkaido University Graduate School of Agriculture Research Faculty of Agriculture Associate Professor
• 2011/08 - 2022/03 Research Faculty of Agriculture, Hokkaido Univ. Lecturer
• 2007/04 - 2011/07 Hokkaido University Graduate School of Agriculture Research Faculty of Agriculture
• 1999/04 - 2007/03 北海道大学 大学院農学研究科 助手

Association Memberships

• 写真測量学会   水環境学会   沙漠学会   農業農村工学会   農村計画学会   水文・水資源学会   

Research Activities

Published Papers

• Prediction of Land Use Change through the Cellular Automata-Markov Model: A Case Study of the Upper Sangkae River Basin in Cambodia

  Chey Vanna, Tadao Yamamoto, Takashi Inoue

  International Journal of Environmental and Rural Development 14 (1) 91 - 96 2023/01 [Refereed]
  
• Clarification of Water Use under the Complicated Irrigation System and its Modeling in the Boribo-Bamnak River Basin, Cambodia

  Heng Salpisak, Tadao Yamamoto, Takashi Inoue

  International Journal of Environmental and Rural Development 14 (1) 17 - 24 2023/01 [Refereed]
  
• Factors of the Continuation of Regional Activities in Hokkaido Rural Area

  Daichi IKEGAMI, Tadao YAMAMOTO, Takashi INOUE

  Journal of Rural Planning Studies 2 (1) 87 - 95 2022/11/25 [Refereed]
  
• Effect of Farmland Consolidation on Protein Content of Paddy Rice ― Evaluation by UAV with multispectral camera ―

  KANEKO Taiki, KAKIMOTO Kengo, KASHIWAGI Junichi, TANI Hiroshi a, YAMAMOTO Tadao

  Irrigation, Drainage and Rural Engineering Journal 90 (1) I 149 - I 159 2022/04/20 [Refereed][Not invited]
  
• Effect of Excavated Small Drainage Channels on Desalinization in Northeastern Thailand

  Naho Nohara, Tadao Yamamoto, Takashi Kume, Katsuyuki Shimizu, Chuleemas Boonthai Iwai

  International Journal of Environmental and Rural Development 11 (2) 38 - 45 2020/12 [Refereed]
  
• Temporal and Spatial Distributions of Soil Apparent Electrical Conductivity in Paddy Rice Fields, Khon Kaen, Thailand

  Katsuyuki Shimizu, Naho Nohara, Tadao Yamamoto, Takashi Kume, Chuleemas Boonthai Iwai

  International Journal of Environmental and Rural Development 11 (1) 158 - 162 2020/06 [Refereed]
  
• Evaluation of Water Shortages in Agricultural Water Use in the Sangker River Basin, Cambodia

  Chey Vanna, Tadao Yamamoto, Takashi Inoue

  International Journal of Environmental and Rural Development 11 (1) 32 - 39 2020/06 [Refereed]
  
• Examination of Optimal Search Method of Unknown Parameters in Tank Model by Monte Carlo Method

  Koji Miwa, Kosuke Mukae, Hiromu Okazawa, Tadao Yamamoto, Takashi Inoue, Emmauel Okiria

  International Journal of Environmental and Rural Development 11 (1) 1 - 7 2020/06 [Refereed]
  
• Functional Evaluation of Groundwater Level Decrease in Non-sloped Subsurface Drainage Systems in Upland Field on Peatland

  Naho Nohara, MinoruYokochi, Tadao Yamamoto, Takashi Inoue

  International Journal of Environmental and Rural Development 10 (2) 110 - 116 2019/12 [Refereed]
  
• Behavior Analysis of Core Farmers Expanding Farm Management Scale through Farmland Consolidation Projects - The case study of Sanwa district, Joetsu city, Niigata prefecture -

  YABIKI Naoki, KAZAMA Jujiro, TAMAI Eiichi, YAMAMOTO Tadao, INOUE Takashi

  農業農村工学会論文集 87 (2) 327 - 338 2019/12 [Refereed][Not invited]
  
• Influence of Changes in Village Structure due to the Progress of Farmland Accumulation to Core Farmers on the Irrigation Water Management System - Case of Sanwa-ku, Joetsu city, Niigata Prefecture

  YABIKI Naoki, YAMAMOTO Tadao, INOUE Takashi

  Journal of Rural Planning (Special issue) 38 (論文特集) 238 - 245 2019/11 [Refereed][Not invited]
  
• Application of TOPMODELs for Assessment of Ecosystem Services: Regulating Service in Agricultural and Forest Watershed

  Kosuke Mukae, Koji Miwa, Hiromu Okazawa, Tadao Yamamoto, Takashi Inoue

  International Journal of Environmental and Rural Development 9 (1) 43 - 50 2018 [Refereed][Not invited]
  
• Evaluation of Participatory Irrigation Management Introduced into Dry Land Agriculture in Turpan, China

  YAMAMOTO Tadao, Nozaki Akihiro, Shimizu Katsuyuki, Kume Takashi, Abdisalam Jalaldin

  International Journal of Environment and Rural Development 8 (2) 64 - 69 2017/12 [Refereed][Not invited]
  
• Rethinking on Collaboration of Organizations and Progressing in Region

  NOMOTO Ken, YAMAMOTO Tadao

  Irrigation, Drainage and Rural engineering 農業土木学会 85 (11) 7 - 10 1882-2770 2017/11 [Refereed][Invited]
  
• Irrigating situation of paddy fields at sloping land on the Andes in Colombia

  KUSA Daisuke, YAMAMOTO Tadao

  Water, Land and environmental engineering 農業土木学会 85 (4) 45 - 50 1882-2770 2017/04 [Refereed][Not invited]
  
• Resilience of Coastal Agricultural Fields to Natural Disasters:—Toward application of resilience concept to agricultural structure improvement projects—

  KUME Takashi, YAMAMOTO Tadao, SHIMIZU Katsuyuki

  Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 公益社団法人 農業農村工学会 84 (3) 301 - 306 1882-2789 2016 [Refereed][Not invited]
   

  This paper discusses resilience of coastal agricultural fields for applying the concept of resilience to agricultural structure improvement projects in near future. We interpreted recovery of the coastal agricultural fields which affected by the 2004 Indian Ocean Tsunami in terms of resilience theory. It was revealed that paddy system depending on inherent hydraulic regime possesses desalinization function. In this study, we showed that the function can be defined as general resilience before the tsunami, and then it changed to specified resilience after the tsunami. This dynamic change of resilience definition of the function sheds light on building resilience of the coastal agricultural fields. From these findings, knowledge and technologies established by agricultural engineering can be interpreted as elements which elicit beneficial effects on recovery of the fields from natural disasters.
• Effluent N, P and COD Loads from Paddy Fields in Japan: A Critical Review

  HARUTA Shinsuke, SUDO Miki, EGUCHI Sadao, OKUBO Takuya, KURODA Hisao, TAKEDA Ikuo, FUJIWARA Taku, YAMAMOTO Tadao, HITOMI Tadayoshi, SHIRATANI Eisaku, YOKOTA Kuriko, INOUE Takanobu

  Japan journal of water pollution research Japan Society on Water Environment 38 (4) 81 - 91 0916-8958 2015/07 [Refereed][Not invited]
   

  While the effluent pollutant loads of nitrogen, phosphorus, and COD from paddy fields are very important basic figures in a wide variety of environmental planning and research tasks, more reliable figures have been required. In this paper, the database of the pollutant load from paddy fields in Japan, established by the authors, is explained and the analytical results and future issues are presented. The database is based on the 72 references published since 1980s and it includes 467 data sets of the pollutant loads and information on the references, and investigation and farming conditions. The investigation of the irrigation season and the verification of the effects of the wide variety of improved farming methods during the irrigation season have been conducted in Japan. However, data for nonirrigation season and specific data obtained in paddy fields cultivated using variety of farming methods will be needed. The verification of the effects of the improved farming methods in the nonirrigation season and the development of the best management practices for the reduction of the pollutant load in the nonirrigation season are also required. The figures for phosphorus and COD adopted for the Seventh Total Water Pollutants Reduction Plan and the water conservation plan for selected lakes are much lower than the average values for by conventional farming methods available in the database. Therefore, the values for the Seventh Total Water Pollutants Reduction Plan will be revised referring to our database. The pollutant load from a paddy field cultivated by custom farming decreased with the decrease in the amount of fertilizer used. Thus, the recent data will be of great value. Other countries are facing a shortage of the data on pollutant loads in paddy fields. In the countries, there is a lack of experience in improving methods of farming to reduce the pollutant loads in paddy fields. Therefore, our database will be useful for other countries. The database is available on the web, and it is expected to contribute to future governmental and research activities.
• Non-uniform Distribution of Soil Salinity Along a Transect of an Irrigation Field in an Arid Region

  KUME Takashi, YAMAMOTO Tadao, SHIMIZU Katsuyuki, ABDISALAM JALALDIN

  International Journal of Environment and Rural Development 6 (1) 181 - 187 2015/04 [Refereed][Not invited]
  
• Educational Benefits of Green Tourism School Trips in Japan

  YAMAMOTO Tadao

  International Journal of Environment and Rural Development 6 (1) 120 - 125 2015/04 [Refereed][Not invited]
  
• コロンビア日系人農家の農業展開と現状

  草 大輔, 山本 忠男

  水土の知 83 (3) 27 - 30 2015/03 [Refereed][Not invited]
  
• Evaluation of Oxbow Lakes and Circulating Irrigation in the Ishikari River Basin, Japan

  KUSA Daisuke, YAMAMOTO Tadao, INOUE Takashi, NAGASAWA Tetuaki

  International Journal of Environment and Rural Development 5 (1) 65 - 71 2014/04 [Refereed][Not invited]
  
• Factors affecting paddy landscape from the perspective of landscape structure

  YAMAMOTO Tadao, NOMOTO Ken

  International Journal of Environmental and Rural Development 5 (1) 148 - 153 2014/04 [Refereed][Not invited]
  
• Impacts of an Agricultural Water Use Restructuring Project on the Water Quality of Oxbow Lake

  YAMAMOTO Tadao, OKAZAKI Hiroki

  International Journal of Environment and Rural Development 4 (1) 220 - 225 2013/04 [Refereed][Not invited]
  
• Water Quality Preservation Effect of Riparian Forests in Watersheds with Dairy Farming Areas in Eastern Hokkaido

  OKazawa Hiromu, YAMAMOTO Tadao, INOUE Takashi, NAGASAWA Tetuaki

  International Journal of Environment and Rural Development 4 (1) 183 - 189 2013/04 [Refereed][Not invited]
  
• Study of Beneficiary Farmaers' Evaluation on the Government-Operated Agriculture and Rural Development Project in Hokkaido

  MORI Sigeru, YAMAMOTO Tadao, INOUE Takashi, NAGASAWA Tetuaki

  Journal of Rural Planning (Special issue) 農村計画学会 31 375 - 380 0912-9731 2012/11 [Refereed][Not invited]
   

  In this study, the government-operated agriculture and rural development project in Hokkaido, Japan, has been examined based on the evaluation made by the viewpoint of beneficiary farmers of the project. The consideration for the future projects is also discussed. From the result of the questionnaire, it became clear that the beneficiary farmers are recognizing the effectiveness of the project, such as increase in income, increase in the yield, and quality improvement of the products. The farmers value the project for its low burden charge as well as its coupled correspondence between the measures and the policies. Farmers of paddy field farming and upland farming gave different results in the questionnaire. This difference seems to be a result of the disparity of the agricultural policy in both farming type.
• Water Quality Improvement by Natural Meandering River Surrounded by Woods in Agricultural Watersheds

  OKAZAWA HIROMU, YAMAMOTO TADAO, INOUE TAKASHI, NAGASAWA TETUAKI

  International Journal of Environment and Rural Development 3 (1) 137 - 143 2012 [Refereed][Not invited]
  
• Influences of agricultural irrigation on regional salinity balance in arid areas of northwestern China

  ABDISALAM JALALDIN, YAMAMOTO TADAO, TAKU OIKAWA, NAGASAWA TETUAKI

  International Journal of Environment and Rural Development 3 (1) 108 - 113 2012 [Refereed][Not invited]
  
• Relationship of Physical Properties of Soils and Salinization of Farmland in Northern Region of Taklamakan Desert(Water & Food Problems and Geotechnical Engineering)

  Kamiya Mitsuhiko, Hasegawa Shuichi, Yamamoto Tadao, Nagasawa Tetuaki

  地盤工学会誌 社団法人地盤工学会 60 (1) 20 - 23 1882-7276 2012/01 [Refereed][Not invited]
   

  Effects of soil physical properties on the salinization of farmlands at northern region of Taklamakan desert were investigated by basin and drip irrigation methods. Regardless of the irrigation methods, salt did not accumulate on the surface for soils having higher permeability conductivity but it appeared on the surface of soils having fine impervious subsoil because of insufficient salt leaching. Removal of the surface soil remedied the growth of cotton but salinization proceeded gradually with year.
• Evaluation of the Comprehensive Hokkaido Development Plan and Land Improvement Projectin Hokkaido : The Case of Government-operated Land Improvement Project

  森 繁, 山本 忠男, 井上 京, 長澤 徹明

  Jurnal of Rural Planning (Special issue) 農村計画学会 30 (0) 327 - 332 0912-9731 2011/11 [Refereed][Not invited]
  
• Influence of soil salinization on growth of cotton in an arid area in Northwest of China

  山本忠男, 長谷川周一, 神谷光彦, アブドサラム・ジャラルディン, アニワル・マイマイティ, 長澤徹明

  International Journal of Environment and Rural Development 2 (1) 19 - 24 2011 [Refereed][Not invited]
  
• Influences on water balance and quality by land-use at puddling period in rice farming area

  MOHAMMED KAMRUL HASAN, YAMAMOTO TADAO, NAGASAWA TETUAKI

  International Journal of Environment and Rural Development 2 (1) 13 - 18 2011 [Refereed][Not invited]
  
• Motivation of Local Residents' Participation in the Maintenance Works of Irrigation and Drainage Facilities Coosideration of Acceptable Maintenance Work Types by using Conjoint Analysis

  Tadao Yamamoto, Tetuaki Nagasawa

  Journal of Rural Planning (Special issue) 29 275 - 280 0912-9731 2010/11
• Consideration of Factors to Promote the Participation in Maintenance Works of Irrigation and Drainage Facilities

  YAMAMOTO Tadao, KITA Takenori, NAGASAWA Tetuaki

  Journal of rural planning 農村計画学会 29 (2) 101 - 106 0912-9731 2010/09 [Refereed][Not invited]
  
• Motivation Factors of Loacal Residents' Participation in the Maintenance Works of Irrigation and Drainage Facilities

  TADAO Yamamoto, NAGASAWA Tetuaki

  Journal of Rural Planning (Special issue) 農村計画学会 28 387 - 392 0912-9731 2010/02 [Refereed][Not invited]
   

  There is a demand for cooperation with farmers and local residents to maintain the irrigation and drainage facilities. In this study, we analyzed and evaluated the factor of local residents' participation in the maintenance works of irrigation and drainage facilities, using a questionnaire survey.
  As a result, we found that these are important to notify the works, to explain about the multi-purpose function of these facilities, and to plan the appropriate operation work for promoting local residents participate in the irrigation and drainage facilities' maintenance works.
• Influences of Land and Water Use on the Water Quality of Canal through Agricultural Area

  Mohammed Kamrul HASAN, YAMAMOTO Tadao, NAGASAWA Tetuaki

  International Journal of Environment and Rural Development 1 74 - 79 2010 [Refereed][Not invited]
  
• The Present Condition and Problem of Agricultural Water Management in Northern Part of Taklamakan Desert

  YAMAMOTO Tadao, Abdisalam JALALDIN, Anwaire MAIMAID, NAGASAWA Tetuaki

  International Journal of Environmental and Rural Development 1 50 - 55 2010 [Refereed][Not invited]
  
• Relationship of soil properties and salinization of farmland in northern region of Taklamakan desert

  神谷光彦, 長谷川周一, 長澤徹明, 山本忠男, アブドサラム・ジャラルディン

  Memoirs of the Hokkaido Institute of Technology 北海道工業大学 37 (37) 1 - 6 0385-0862 2009 [Refereed][Not invited]
  
• River Hydrological Conditions and Pollution Load Discharge for a Livestock Farming Watershed in a South-western Hokkaido, Japan

  OKAZAWA Hiromu, NAGASAWA Tetuaki, INOUE Takashi, YAMAMOTO Tadao

  Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering 73 (6) 603 - 610 2005/12 [Refereed][Not invited]
  
• Irrigated Agriculture and Regional Environment in the Tarim River Watershed : Case Study of the Shaya Irrigated District in the Ugen River Basin

  JALALDIN Abdisalam, NAGASAWA Tetuaki, YAMAMOTO Tadao

  Transactions of Rural Planning 農村計画学会 7 73 - 78 0912-9731 2005/11 [Refereed][Not invited]
   

  Irrigation at the arid region like the Tarim river watershed causes the salinization and influences to the regional environment. In this paper, problems between the agricultural wateruse and environmental conservation discussed by real conditions of the water resource utilities. The investigated area is the Syaya irrigated district in the Ugen river basin, one of branches of the Tarim river.
  The results confirmed by investigation are as follows. (1) The present conditions of irrigated agriculture has various contradictions and there are many points of improvement for conservation of the regional environment. (2) The water saving is necessary in the over all irrigation system for agricultural development. (3) Irrigated agriculture must be consolidate with drainage system for prevention the salinization and the desertification.
• 森林流域と農業流域における融雪流出時の汚濁負荷流出特性

  岡澤 宏, 長澤徹明, 井上京, 山本忠男, 鵜木啓二

  農業土木学会論文集 237 57 - 65 2005 [Refereed][Not invited]
  
• Water Environment of Oxbow Lake and Landuse of its Watershed in the Ishikari River Basin

  YAMAMOTO Tadao, KANBE Toshimitsu, NAGASAWA Tetuaki, INOUE Takashi

  Journal of Rural Planning Association 農村計画学会 23 67 - 72 0912-9731 2004/11 [Refereed][Not invited]
  
• Problems of Irrigation System in Turphan City of Xinjiang Uyghur, China

  JALALDIN Abdisalam, NAGASAWA Tetuaki, YAMAMOTO Tadao

  Transactions of Rural Planning 農村計画学会 6 31 - 36 0912-9731 2004/11 [Refereed][Not invited]
  
• Characteristics of Stream Water Quality during Rainfall Runoff on an Upland Field Area of Eastern Hokkaido, Japan

  OKAZAWA Hiromu, INOUE Takashi, YAMAMOTO Tadao, NAGASAWA Tetuaki, UNOKI Keiji

  農業土木学会論文集 農業土木学会 71 (5) 593 - 600 0387-2335 2003/10 [Refereed][Not invited]
  
• 少雪寒冷な酪農流域における融雪凍結期の水質水文環境

  鵜木啓二, 山本忠男, 井上 京, 長澤徹明, 岡澤 宏

  農業土木学会論文集 228 9 - 15 2003 [Refereed][Not invited]
  
• Effect of Lake Utilization and Watershed Agricultural Landuse on Water Quality in Oxbow Lakes of Ishikari River Basin

  YAMAMOTO Tadao, NAGASAWA Tetuaki, INOUE Takashi

  Transactions of Rural Planning 農村計画学会 4 157 - 162 0912-9731 2002/11 [Refereed][Not invited]
   

  Water quality of oxbow lakes in middle and lower reaches of Ishikari river basin, Hokkaido, was investigated with special notice to the Ianduse of their surroundings and the form of usage of water in oxbow lake itself. Water quality of oxbow lake during irrigation period of rice paddy was in good condition. Water quality was also good where its water is utilized as source of irrigation. However, with the increase of upland farming in the watershed, the water quality degraded. It is suggested that the irrigation use of water of oxbow lake will sustain the good condition of water quality, so that the conservation of oxbow lake as one of the important element of rural resources must focus on relation with surrounding agricultural activity.
• Relationship between Water Quality Environment and Landuse in an Agricultural Watershed during Snowmelt Period : Principal Component Analysis of River Water Quality

  UNOKI Keiji, NAGASAWA Tetuaki, INOUE Takashi, YAMAMOTO Tadao

  Journal of Japan Society of Hydrology & Water Resources 水文・水資源学会 15 (4) 391 - 398 0915-1389 2002/07 [Refereed][Not invited]
  
• Evaluation of Oxbow Lake for Rural Resource from its Flood Control Function in Ishikari River Basin

  KUSA Daisuke, YAMAMOTO Tadao, NAGASAWA Tetuaki, INOUE Takashi

  Transactions of rural planning 農村計画学会 3 (0) 67 - 72 0912-9731 2001/12 [Refereed][Not invited]
   

  Objective of this study is to clarify the functions of oxbow lakes as one of regional resources in rural area. The present status of oxbow lakes has been briefly investigated through interviews from town officers and farmer's water users association. It became clear that most of oxbow lakes in Ishikari river basin are utilized as source and reservoir of irrigation water, parks for recreational use, and retarding pond for flood prevention. etc. In this paper, the flood control function of oxbow lake is high lightened, by quantitative evaluation of simulation model. It is recommended that the various functions of oxbow lake should be evaluated widely ndd effectively utilized as one of valuable regional resources.
• Evaluation of Oxbow Lakes in Ishikari River Basin for its Function of Water Quality Conservation

  YAMAMOTO Tadao, NAGASAWA Tetuaki, INOUE Takashi, KUSA Daisuke

  Transactions of rural planning 農村計画学会 3 (0) 49 - 54 0912-9731 2001/12 [Refereed][Not invited]
   

  In this paper, the function of water quality conservation by oxbow lakes in Ishikari River basin was evaluated. Many oxbow lakes of Ishikari River basin have been utilized as part of water resource and reservoir of irrigation water for agriculture, especially for circular reuse of irrigation water. Semi-closed oxbow lake that has no outlet to Ishikari River accumulates the load from catchment area in its body, which means effluent load to Ishikari River has been cut. The function of load reduction by oxbow lake that has outlet to Ishikari River was also evaluated from balance calculation. More than 50% and 70% of T-N was reduced by oxbow lake during puddling period and normal period, respectively.
• Characteristics of Nitrogen Runoff During Snowmelt Period in Agricultural Watershed River

  UNOKI Keiji, NAGASAWA Tetsuaki, INOUE Takashi, YAMAMOTO Tadao

  Journal of Japan Society of Hydrology & Water Resources 水文・水資源学会 14 (6) 452 - 460 0915-1389 2001/11 [Refereed][Not invited]
  
• River Water Quality During Rainstorm Runoff on Agricultural and Forested Watersheds of Southwestern Hokkaido, Japan

  OKAZAWA Hiromu, NAGASAWA Tetuaki, INOUE Takashi, YAMAMOTO Tadao

  Transactions of the Agricultural Engineering Society,Japan 農業土木学会 69 (1) 35 - 42 0387-2335 2001/02 [Refereed][Not invited]
  
• Characteristics of River Water Quality of Agricultural Watershed with Complex Landuse in Hokkaido, Japan

  INOUE Takashi, MUNEOKA Toshimi, UNOKI Keiji, YAMAMOTO Tadao, NAGASAWA Tetuaki

  Journal of Japan Society of Hydrology & Water Resources 水文・水資源学会 13 (5) 347 - 354 0915-1389 2000/09 [Refereed][Not invited]
  
• Nitrogen Outflow and River Water Quality in Dairy Farming Area of Hokkaido

  MUNEOKA Toshimi, NAGASAWA Tetuaki, INOUE Takashi, YAMAMOTO Tadao

  Journal of the Japanese Society of Irrigation,Drainages and Reclamation Engineering 農業土木学会 68 (3) 1 - 4 0369-5123 2000/03 [Refereed][Not invited]
  
• 北海道東部浜中地区における流域の土地利用と河川水質

  井上 京, 山本 忠男, 長澤 徹明

  農業土木学会論文集 農業土木学会 67 (2) 249 - 256 0387-2335 1999/04 [Refereed][Not invited]
  
• Changes of form and size of field lot on rice paddy in Ishikari mire region, Hokkaido, Japan

  YAMAMOTO Tadao, INOUE Takashi, NAGASAWA Tetuaki, MORISHITA Tatsuo

  Transactions of the Agricultural Engineering Society,Japan 農業土木学会 67 (1) 35 - 44 0387-2335 1999/02 [Refereed][Not invited]
  
• Influence of Irrigation and Drainage on Water Quality Environment of Paddy Field Area : A Case Study on the Ishikari River Basin in Hokkaido, Japan

  NAGASAWA Tetuaki, INOUE Takashi, UMEDA Yasuharu, MUNEOKA Toshimi, YAMAMOTO Tadao

  Journal of Japan Society of Hydrology & Water Resources 水文・水資源学会 10 (5) 477 - 484 0915-1389 1997/09 [Refereed][Not invited]
   

  Water quality was studied on the rice grown paddy field areas in Ishikari River basin of Hokkaido, Japan, with special concern to irrigation and drainage management. Irrigation water of the study sites show relatively good condition due to less effect of human pollution. Concentration and load of nitrogen(N) and phosphorus(P) are generally higher in drainage water than in irrigation water. Water quality of drainage water tend to fluctuate in wide range, with N and P in various form. Apparent discharge of N and P just after fertilizing were captured. During later period of rice growth, the accumulated N and P in form of organism in soil and water of paddy field, changes its form into inorganic matter, and discharges to the river. As discharge of N and P from rice paddy is restricted in particular period, thus, not only about the control of loss of fertilizer component, but about timing of fertilizing and way of water management will be also necessary for less load discharge.

Books etc

• 基礎から学ぶ水理学

  山本 忠男 (Joint work第６章)
  理工図書 2017/09
• Sustainable Irrigation and Drainage IV, Management, Technologies and Policies

  YAMAMOTO Tadao (ContributorIrrigation Management, p.245-253)
  WITpress 2013/12
• Restoring Satoyama Landscapes in Cambodia

  OKAZAWA Hiromu, YAMAMOTO Tadao (Joint workEffects of Landscape pattern on Nitrogen Concentration in River Water in Agricultural Catchments, Western Hokkaido, Japan)
  2013
• Sustainable Irrigation Management, Technologies and Policies III

  (Contributor)
  WITpress 2010/06
• 中国新疆ウイグルの環境変動とその危機

  千葉大学環境リモートセンシング研究センター 2009
• 中国新疆ウイグルの環境変動とその危機

  千葉大学環境リモートセンシング研究センター 2009
• The crisis of environmental change in Xinjiang Uyghur, China

  CEReS, Chiba university 2009
• The crisis of environmental change in Xinjiang Uyghur, China

  CEReS, Chiba university 2009
• Sustainable Irrigation Management, Technologies and Policies

  WITpress 2006
• Sustainable Irrigation Management, Technologies and Policies

  WITpress 2006
• 北海道の農業・農村(共著)，139-145，159-163，農業土木学会北海道支部創設50年記念出版編集委員会,(2004)>

  農業土木学会北海道支部 2004
• Agriculture and rural region in Hokkaido

  2004

Conference Activities & Talks

• erification of the water supply rules in an arid area – Case study of the Xayar irrigation district in the northern part of the Taklamakan Desert -  [Invited]

  YAMAMOTO Tadao

  Sustainable Irrigation  2014/06
• Change of Oxbow lake water quality under the agricultural water use restructuring project  [Not invited]

  YAMAMOTO Tadao

  international society of environmental and rural development  2013/01
• Factors responsible for the effective introduction of water-saving irrigation facilities in the Tarim River Basin  [Invited]

  YAMAMOTO Tadao

  Sustainable Irrigation 2012  2012/12
• 河跡湖の利用と水環境保全  [Invited]

  山本 忠男

  環境・自然を考える会  2012/10
• Effect of water purification at artificial agricultural drainage in dairy farming watershed  [Not invited]

  YAMAMOTO Tadao

  Nordic Water 2012  2012/08

MISC

• Comparison of physical caracteristics of boreal and tropical peat

  Tetsuya SHIMAMURA, Ryo INOUE, Hiroyuki SUGIMOTO, Takashi KUME, Tadao YAMAMOTO, Erna S POESIE  日本生態学会大会講演要旨(Web)  68-  2021/03  [Not refereed][Not invited]
  
• Effect of Excavated Small Draingane Channels on Desalinization in Northeastern Thailand

  Naho Nohara, Tadao Yamamoto, Takashi Kume, Katsuyuki Shimzu, Chuleemas Boonthai Iwai  Abstracts of the 11th ICERD-International Conference on Environmental and Rural Development  2020/02/29  [Not refereed][Not invited]
  
• Combution characteristics and water retention curve of boreal and tropical peat

  SHIMAMURA Tetsuya, INOUE Ryo, SUGIMOTO Hiroyuki, KUME Takashi, YAMAMOTO Tadao, POESIE Erna S  日本生態学会大会講演要旨  67-  2020  [Not refereed][Not invited]
  
• タイ東北部における塩害に対する農家のレジリエンス強化に関する一考察

  山本忠男, 生方史数, 松田浩敬, 久米崇, 清水克之  農業農村工学会全国大会講演要旨集  16  -17  2019/09  [Not refereed][Not invited]
  
• Resilience of Large-scale Irrigation Districts to Change of Social Regime

  清水 克之, 山本 忠男, 久米 崇  水土の知 : 農業農村工学会誌  87-  (6)  465  -468  2019/06
• 「わが村は美しく―北海道運動」授賞地区にみる地域活動の特徴

  山本忠男, 池上大地  農業農村工学会全国大会講演要旨集  168  -169  2018  [Not refereed][Not invited]
  
• 石狩川流域篠津地域における計画断水の実態と課題

  西村収, 山本忠男  農業農村工学会全国大会講演要旨集  764  -765  2017  [Not refereed][Not invited]
  
• 広域的な農地流動を考慮した農業生産基盤整備計画について

  矢挽尚貴, 山本忠男, 井上京  農村計画学会春期大会学術研究発表会要旨集  2016-  2016
• レジリエンスから解釈した農業農村地域の変化への適応とショックからの回復

  久米崇, 山本忠男, 清水克之  農業農村工学会全国大会講演要旨集  19  -20  2016  [Not refereed][Not invited]
  
• 農業体験型修学旅行が参加者の意識に及ぼす影響因子の検討

  山本忠男, 後藤陽子  農業農村工学会全国大会講演要旨集  297  -298  2016  [Not refereed][Not invited]
  
• 中国トルファン地区における灌漑農業の実態と課題

  野崎 晃央, 山本 忠男, 清水 克之  農業農村工学会北海道支部研究発表会講演集  64-  42  -47  2015/10/22
• Agricultural History and Current Situation of Japanese Immigrant Farmers in Colombia

  草 大輔, 山本 忠男  水土の知 : 農業農村工学会誌  83-  (3)  199  -202  2015/03
• 農業農村におけるレジリエンス強化に向けて

  久米崇, 山本忠男, 清水克之  農業農村工学会全国大会講演要旨集  120  -121  2015  [Not refereed][Not invited]
  
• 乾燥地域における農民参加型水管理組織の役割とその合理性に関する研究

  野崎晃央, 清水克之, 久米崇, 山本忠男  農業農村工学会全国大会講演要旨集  376  -377  2015  [Not refereed][Not invited]
  
• 農業流域の河跡湖における水質変動モデルの構築

  赤塩大樹, 山本忠男  農業農村工学会全国大会講演要旨集  524  -525  2015  [Not refereed][Not invited]
  
• 環境変動に対するレジリエンス強化からみた乾燥地農業の持続可能性

  山本 忠男, 久米 崇, 清水 克之  農業農村工学会全国大会講演要旨集  88  -89  2014  [Not refereed][Not invited]
  
• 乾燥地域における灌漑農地の塩性化に対するレジリエンス

  久米 崇, 清水 克之, 山本 忠男  農業農村工学会全国大会講演要旨集  90  -91  2014  [Not refereed][Not invited]
  
• 社会体制の変化による灌漑面積の減少とその後の回復－カザフスタンにおける水稲－畑作物輪作システムの事例－

  清水 克之, 山本 忠男, 久米 崇  農業農村工学会全国大会講演要旨集  92  -93  2014  [Not refereed][Not invited]
  
• 積雪寒冷地域における水田からの汚濁負荷流出

  山本 忠男, 上野 貴将  農業農村工学会全国大会講演要旨集  556  -557  2014  [Not refereed][Not invited]
  
• 融雪期の水田からの汚濁負荷流出特性

  赤松 洋児, 山本 忠男  農業農村工学会北海道支部研究発表会講演集  62-  102  -107  2013/10/18
• 1-1-8 Effect of soil aggregate size, fertilizer management and soil salinization on N2O production

  Abudushalamu Zaimire, Shimizu Mariko, Yamamoto Tadao, Hatano Ryusuke  Abstracts of the meeting, the Society of the Science of Soil and Manure  (59)  3  -3  2013/09/11
• 農業水利再編による湖沼の水質変化

  山本忠男, 岡崎宏軌, 高木優次, 野本健  農業農村工学会全国大会講演要旨集  576  -577  2013/08  [Not refereed][Not invited]
  
• 農業水利再編にともなう河跡湖の水質変化

  岡崎 宏軌, 山本 忠男, 野本 健, 高木 優次  農業農村工学会北海道支部研究発表会講演集  61-  88  -93  2012/10  [Not refereed][Not invited]
  
• Water balance and saline transfer in the irrigated district, Tarim River Basin

  OIKAWA Taku, YAMAMOTO Tadao, HATANO Ryusuke, NAGASAWA Tetuaki  農業農村工学会大会講演会要旨集  2012/09  [Not refereed][Not invited]
  
• Current condition and problems of irrigation on northern part of Taklimakan Desert

  YAMAMOTO Tadao, NAGASAWA Tetuaki  農業農村工学会大会講演会要旨集  2012/09  [Not refereed][Not invited]
  
• Feasibility verification of water distribution rules on irrigated agriculture in the northern part of Taklamakan Desert

  YAMAMOTO Tadao, Abdisalam JALALDIN, NAGASAWA Tetuaki  農業農村工学会大会講演会要旨集  2012/08  [Not refereed][Not invited]
  
• 水田地区における水管理が排水水質に及ぼす影響

  岡崎 宏軌, 山本 忠男, 野本 健, 高木 優次  農業農村工学会北海道支部研究発表会講演集  60-  88  -91  2011/10  [Not refereed][Not invited]
  
• 農業用水路のパイプライン化が農業水利に及ぼす影響

  及川 拓, 山本 忠男, 長澤 徹明  農業農村工学会大会講演会要旨集  2011/09  [Not refereed][Not invited]
  
• 北海道地区セミナー

  野本 健, 上田 裕文, 八巻 一成, 山本 忠男  農村計画学会誌 = Journal of Rural Planning Association  30-  (1)  96  -96  2011/06/30
• 北海道における国営土地改良事業の展開と評価

  森 繁, 山本 忠男, 長澤 徹明  農村計画学会春季大会  2011/04  [Not refereed][Not invited]
  
• Influences on water balance and quality by agricultural land-use at irrigation period in the Shinotsu district

  Hasan Mohammed Kamrul, Yamamoto Tadao, Nagasawa Tetuaki  農業農村工学会北海道支部研究発表会講演集  59-  66  -71  2010/10/15
• 農業水利の変化が湖沼の負荷収支に及ぼす影響

  織田 明季哉, 山本 忠男, 野本 健, 高木 優次  農業農村工学会北海道支部研究発表会講演集  59-  72  -77  2010/10  [Not refereed][Not invited]
  
• Consideration of Factors to Promote the Participation in Maintenance Works of Irrigation and Drainage Facilities

  The Association of Rural Planning  29-  (2)  101  -106  2010  [Not refereed][Not invited]
  
• 半乾燥地における灌慨農業の課題--新彊ウイグル自治区・シャヤ県を事例に

  栗原 望, 山本 忠男, 長澤 徹明  農業農村工学会北海道支部研究発表会講演集  58-  (0)  76  -79  2009/10/28  [Not refereed][Not invited]
  
• 農業水利の影響下にある石狩川河跡湖の水環境

  織田 明季哉, 山本 忠男, 長澤 徹明  農業農村工学会北海道支部研究発表会講演集  58-  (0)  102  -105  2009/10/28  [Not refereed][Not invited]
  
• 農業水利が塩類集積におよぼす影響

  山本忠男  中国新疆ウイグルの環境変動とその危機  122  -138  2009
• 酪農流域における河川水質の長期的変動--「家畜排泄物管理適正化法」の効果

  下川 昇大, 山本 忠男, 井上 京  農業農村工学会北海道支部研究発表会講演集  57-  (0)  100  -105  2008/10/22  [Not refereed][Not invited]
  
• Land use influences on the water quality of Shinotsu Canal

  Hasan Mohammed Kamrul, Yamamoto Tadao, Nagasawa Tetuaki  農業農村工学会北海道支部研究発表会講演集  56-  124  -129  2007/10/30
• 農業用水路の管路化による水質・水文環境への影響

  小和田 桂太, 山本 忠男, 井上 京  農業農村工学会北海道支部研究発表会講演集  56-  (0)  66  -69  2007/10/30  [Not refereed][Not invited]
  
• 北見地域における農業水利施設維持管理への住民意識

  喜多 丈典, 山本 忠男, 長澤 徹明  農業農村工学会北海道支部研究発表会講演集  56-  (0)  150  -155  2007/10/30  [Not refereed][Not invited]
  
• 農業水利が塩類集積におよぼす影響-新彊ウイグル自治区シャヤ県における事例

  山本忠男  第6回新彊ウイグルの環境変動に関するシンポウム論文集, 2007  27  -34  2007
• Ecaluation of Oxbow Lskes in Ishikari River Basin for Regional Resources

  YAKAMOTO Tadao  農村計画学会誌 = Journal of Rural Planning Association  25-  (2)  163  -164  2006/09/30
• Effectiveness of Constructed Small Pools ‘Wando’ on Purification of agricultural drain

  International Conference on Hydrology and Ecology – The Groundwater / Ecology Connection  125  -128  2006  [Not refereed][Not invited]
  
• Characteristics of Pollutant Load Discharge during Snowmelt Period on Forested vs. Agricultural Watershed

  OKAZAWA Hiromu, NAGASAWA Tetuaki, INOUE Takashi, YAMAMOTO Tadao, UNOKI Keiji  Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering  73-  (3)  257  -265  2005/06/25
• ルネッサンスのはじまり

  山本 忠男  農業土木学会誌 = Journal of the Japanese Society of Irrigation, Drainage and Reclamation Engineering  72-  (6)  509  -509  2004/06/01  [Not refereed][Not invited]
  
• 研究・教育・学会活動を通して感じたこと : 提案

  山本 忠男  農業土木学会誌 = Journal of the Japanese Society of Irrigation, Drainage and Reclamation Engineering  72-  (4)  324  -326  2004/04/01  [Not refereed][Not invited]
  
• Influence of Near-River Area’s Land Use on River Water Quality during Rainfall Runoff in Agriculture Watersheds

  Participatory Strategy for Soil and Water Conservation  39  -44  2004  [Not refereed][Not invited]
  
• River Water Quality and Hydrological Condition of Dairy Farming Watershed during Snowmelt and Ground Thawing Period

  UNOKI Keiji, YAMAMOTO Tadao, INOUE Takashi, NAGASAWA Tetsuaki, OKAZAWA Hiromu  Transactions of the Agricultural Engineering Society,Japan  71-  (6)  733  -739  2003/12/25
• Effect of Previous Flood on Suspended Sediment Transport during Rainstorm Runoff, ISCO,(2002)*

  Proceedings 12th International Soil Conservation Conference  26  -32  2002  [Not refereed][Not invited]
  

Awards & Honors

• 2020/02 International Society of Environmental and Rural Development Award of Outstanding Scientific Achievement
  
• 2013/01 International Society of Environmental and Rural Development Award of Excellent Paper
   Change of oxbow lake water quality under the agricultural water use restructuring project 

  受賞者: YAMAMOTO Tadao
• 2010 ICERD Award of Excellent Paper
  
• 2006 農村計画学会奨励賞
  

Research Grants & Projects

• 生物多様性保全・気候変動対策・地域振興を最適化させる自然公園設計：北海道東部・根釧地方における学際的研究と実践

  環境省：環境研究総合推進費

  Date (from‐to) : 2023/04 -2026/03 

  Author : 仲岡雅裕, 山本忠男, 愛甲哲也, 松島肇
• 東北タイにおける塩類土壌の改良・再定義と新たな利活用オプションの開発

  日本学術振興会：科学研究費助成事業 基盤研究(B)

  Date (from‐to) : 2021/04 -2025/03 

  Author : 久米 崇, 山本 忠男, 生方 史数, 大澤 由実, 松田 浩敬
• Development of the quantitative evaluation methods of reinforcement factor in farmers' resilience for salinization by disaster and climate change

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

  Date (from‐to) : 2017/04 -2020/03 

  Author : YAMAMOTO Tadao

   

  This study's objective is to develop quantitative evaluation methods to clarify the factors that enhance the farmers' resilience in the salinization region. We performed the interview research to residents and field research to grasp salt and groundwater changes in the saline field and revealed the following. (1) extracting resilience factors and considering their relationship, (2) leaching effect in the rainy season was more effective in paddy fields than saline wasteland. And annual EC change in the surface of saline wasteland is small, (3) Farmer's family budget become stabilized by taking several sources of income, (4) Restoration curve was different from each village. Personal differences in restoration curves related to restoration speed or extent of damage than the form of its curve. Developing the quantitative evaluation method was difficult to achieve due to the difficult situation to collect data in the finalization phase because travel to foreign country has been restricted.
• Consideration of critical levels in management of water and soil resources for sustainable agriculture in an arid area.

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2012 -2014 

  Author : YAMAMOTO TADAO, SHIMIZU Katsuyuki, KUME Takashi

   

  The study object is to examine the wise use of land and water for establishment of sustainable irrigation agriculture with preventing a soil salinization in an arid area. The field research is carried to grasp of the agricultural water use and the relations with salinization and irrigation on the cultivated field in Turpan district, China. As results, (a) farmers participation water management introduced in late years is effective in water distribution, (b) diffusing of well and increasing of groundwater use affect the decreasing of Karze (Qanat) discharge and (c) water quality in well is different by wells depth and location, were become clear. Then, it was confirmed that accumulating saline between soil surface and about 60cm depth occurs the salinization in the field. This reason is that sufficient water volume for leaching could not be secured because of the drip irrigation introduced by rearranging from border irrigation.
• Changes of water quality under an agricultural water use restructuring project and possibility of introduction of an environmental water

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2011 -2013 

  Author : YAMAMOTO Tadao

   

  The objective of this study is to evaluate the impacts of the agricultural water use restructuring project on the physical and chemical water properties of the oxbow lake in Hokkaido, Japan. We predicted that decreased water removal after the pumping station was abolished would increase TN concentrations in the lake water. Though removal of water by pumping tends to take pollution from the lake, TN concentrations fell after pumping station was abolished. The cause of decreased TN concentration was mainly decreased organic nitrogen concentration. Moreover, the TN load balance changed from an outflow type to a storage type in 2011 and 2013 despite decreased input load into the lake. We suggest that this reduction in TN concentration after 2011 reflects the decreased organic nitrogen concentration due to biological purification effects. This is because increasing retention time caused load removal from the lake, and the water retention time also increased significantly in this lake.
• Empirical study on constructs of sustainable agriculture and agricultural water management system in northwest of China.

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2009 -2011 

  Author : NAGASAWA Tetuaki, HATANO Ryusuke, INOUE Takashi, YAMAMOTO Tadao, HASEGAWA Shuichi, KAMIAY Mitsuhiko

   

  In this study, we examined the water management issues based on present condition, and the mechanisms of soil salinization and its measures, for the purpose of soil and water conservation in Tarim River Basin. As results, we confirmed that the agricultural water distribution is rational system and the water saving irrigation systems have some problems. In addition, the continuous of border irrigation have possibilities to accelerate soil salinization. And sodium tends to flow out from irrigation district in the view on salinity balance.
• 農業水利再編にともなう湖沼の水質水文環境の変化予測

  （財）クリタ水・環境科学振興財団：国内研究助成

  Date (from‐to) : 2009 -2010 

  Author : 山本 忠男
• Evaluation of water purification and consideration of the purification mechanism in drainage ditch with purified function

  Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(若手研究(B))

  Date (from‐to) : 2007 -2009 

  Author : Tadao YAMAMOTO

   

  Evaluation of water purification and consideration of the purification mechanism in drainage ditch with purified function were study objects. As a result, the purified function for nitrogen components has been kept since its improved, and the purification effect showed at the rainfall period as well as no rainy days. Moreover, it was confirmed that nitrogen purification depended on the denitrification greatly.
• Conservation on regional environment in semi-arid areaby transfiguration of water management and landuse

  Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(B))

  Date (from‐to) : 2007 -2008 

  Author : Tetuaki NAGASAWA, Takashi INOUE, Tadao YAMAMOTO, Shuichi HASEGAWA, Mitsuhiko KAMIYA, Kazumasa NAKAMURA, Keiji UNOKI

   

  本研究では, 半乾燥地域の持続的農業のために, 適正な水土利用と管理に関する提言をおこなうことを目的とし, タリム河流域の農業水利と塩類集積の発生要因について検討した。その結果, この地域特有の農業水利の現状がある程度把握できた。特に冬季潅漑の特殊性が明確となった。また, 塩類集積の発生についても, 従来, この地域で云われていた高い地下水位を原因とする説とは異なる要因の予測ができた。
• Study of Agricultural Water Use and Environmental Conservation in Cold and Arid Region

  Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(B))

  Date (from‐to) : 2005 -2006 

  Author : Tetuaki NAGASAWA, 井上 京, 山本 忠男, 長谷川 周一, 神谷 光彦, 中村 和正

   

  The purpose of this research proposes the solutions to environmental problems causing agricultural water-use in the cold and arid region. Recent 2 years, collaborative research with Japanese and Chinese scientists carried out field investigation above problems in the Tarim River watershed, Xinjiang Uygur Autonomous Region, China. That is, agricultural water-use, soil properties, groundwater conditions and water qualities conducted a field survey mainly at the Shaya irrigation district in the middle reaches of the Tarim River. At the same time, data about water and land resources, agricultur...
• 寒冷農業流域における浄化型排水路の機能評価

  文部科学省：科学研究費補助金(若手研究(B))

  Date (from‐to) : 2004 -2006 

  Author : 山本 忠男

   

  本研究は,浄化型排水路の整備前後における水質浄化機能の把握を目的として,平成16年度より実施し,18年度が最終年となった。調査はほぼ計画どおり実施できたが,秋の豪雨によって観測器等が被害を受け,降雨時の連続観測は十分な成果が得られなかった。以下に整備前後の水質浄化効果の変化について概要を示す。平水時の浄化型水路に整備した区間の濃度を比較すると,T-NとNO3-Nについては,おおむね改修前より改修後に流下に伴う濃度低下がみられた。とくにNO3-Nは,改修後の時間経過によって濃度の低下率が大きくなる傾向にあった。改修区間以外で流下にともなう濃度変化を比較したところ,濃度低下率が小さかった。このことから,浄化型水路への改修によって,窒素成分の濃度を低下させる効果が生じていると考えられる。改修区間におけるNO3-N/Cl-の差(Δ)を比較した。NO3-N/Cl-は生物的作用によるNO3-N除去を示す指標であり,NO3-N/Cl-の低下はNO3-Nの生物への吸収や脱窒により生じるとされている。その結果,水路改修区間では流下によってΔが負となった。これは,流下過程で吸収や脱窒によりNO3-N濃度の低下が生じたことを示唆する。また,改修直後と比べ,1年経過した平成18年では,改修前Δとの差が拡大している。すなわち,この区間では改修後,時間とともに河道周辺の植生や河床の付着藻類などが増殖し,...
• 地域資源としての河跡湖の機能分析と評価

  文部科学省：科学研究費補助金(萌芽研究)

  Date (from‐to) : 2003 -2005 

  Author : 長澤 徹明, 山本 忠男, 井上 京

   

  今年度は,天塩川流域の8ヵ所の河跡湖を対象とした地域資源としての機能分析と評価を中心に調査を実施した。また,過去2年間の石狩川流域河跡湖の調査結果とあわせて,研究の最終年度としてのとりまとめをおこなった。まず,天塩川流域河跡湖の利用状況の把握や機能評価のために,当該地区の自治体をはじめとする管理主体を対象にヒアリング調査を実施した。その結果,天塩川流域上流に位置する河跡湖では,周辺土地利用は水田が卓越することから水田用水源・補助水源として利用されるものの,下流域では酪農主体の農業経営のため,単なる排水の受け皿として認識されていることが確認された。中流域の河跡湖では,親水公園利用がみられた。また,水面面積の大きな河跡湖では洪水調節機能が付せられていることもわかった。つぎに河跡湖の水質環境について調査を実施した。各河跡湖において定期的に採水を実施し,さらに重点調査地として2ヵ所の河跡湖では水位変動と流出水量などの連続観測を実施した。窒素,リンに関する各水質項目は,おおむね夏季に良好となり,秋季から悪化する傾向があった。また,春季には,水田地帯の河跡湖で高濃度のSSやT-Nが確認された。これは,水田の代かき・田植えにともなう強制排水の影響と推察された。一方,畑地帯や酪農地帯における春季の水質も高濃度であり,この原因としては融雪や施肥などが影響していると考えられた。現在,前年度の成果...
• Research on Effective Installation of Subsurface Drain and the Maintenance of its Function

  Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(B))

  Date (from‐to) : 2002 -2005 

  Author : Takashi INOUE, 北川 巌, 中村 和正, 山本 忠男, 柏木 淳一

   

  Subsurface drainage is one of the important technologies for the improvement of field condition for agricultural productivity. Simple and objective method for evaluation of efficiency of subsurface drain is required. Inoue and Yamamoto investigated the problem of pipe drain from the viewpoint of its condition of installation by analyzing the concavity and convexity of pipe alignment, and proposed the use of deviation from the configured alignment and the flexion rate of pipe for the pipe condition. The sustainability of drainage function was also verified by continuous measurement of ground...
• 「市町村合併時代における農村計画ネットワーク構築に関する研究」のための企画調査

  文部科学省：科学研究費補助金(基盤研究(C))

  Date (from‐to) : 2004 -2004 

  Author : 斎尾 直子, 栗原 伸治, 吉村 亜希子, 齋藤 雪彦, 山本 忠男, 清水 庸

   

  平成の市町村合併時代を迎えた我が国においては、都市・農村に関わらず行政業務の縮小と行政管轄範域の拡大が進行していく状況にある。同時に近年、特に農村地域でみられた補助事業依存体質の改善の必要性が指摘されている。すなわち、これらの行政サービスのスリム化は、拡大した範域における役所・役場では実行不可能となったきめ細かい公共事業を各地域の住民個人や地域組織が担っていくことを意味する。加えて、近年の農業の衰退に伴い、生産条件が不利な農村地域では農業生産活動を中心とした地域組織は脆弱化し、新たな組織の在り方が求められている。このような背景の中、本企画調査は、市町村合併後の公共サービスの在り方を模索する全国各地の農村地域において、地域ごとの特性を活かしつつ「地域づくり」「地域活性化」を行っていくための『適正計画範域』を検討することにより、「農村地域住民(農業者,農村生活者)」「農村の地域づくり支援者(行政担当者,農村計画コンサルタント,農村計画学研究者,地域出身者,都市住民)」大枠二者間、あるいは大枠内の各々相互に、情報・人材・地域づくりノウハウを共有し活用するための"農村計画ネットワーク"の構築の提案を目指した。具体的には、農村地域住民と農村地域づくり支援者とのネットワーク構築という、来年度以降の各主体の業際的作業始動に向け、モデル地域の現地調査、既往研究やデータ・資料・現地調査結果の分...
• 泥炭地湿原の再生手法確立に関する研究

  文部科学省：科学研究費補助金(萌芽研究)

  Date (from‐to) : 2002 -2004 

  Author : 井上 京, 山本 忠男, 冨士田 裕子

   

  泥炭地湿原植生の復元手法を確立するために、札幌市内に残存する篠路湿地と、道北のサロベツ湿原において復元実験を行なった。篠路湿地は相観的にはササ原の状態にある。現状把握の調査の結果、篠路湿地には、6群落が分布し、乾燥化にともなう退行遷移の進行が示された。ミズゴケが残存し、湿原特有の植物もみられるヌマガヤ-ミズゴケ群落は、空中写真の解析から泥炭をはぎ取った跡地に成立した植生であることが判明した。現地での植生復元実験から、地表から20〜30cmの分解の進行した泥炭を排除すると、相対的に地下水位が高くなり、ササの排除と低層湿原種の出現が期待できることが明らかになった。出現する植物の中には、現植生内では見られないものが出現し、泥炭内の埋土種子由来と考えられた。サロベツ湿原では、道路側溝の影響で地下水位が低下し、ササの侵入が著しい場所でミズゴケ優占植生の復元実験を行なっている。実験は条件をかえ、近隣から刈り取ってきたミズゴケの切片を方形区内におおよそ25%面積を覆うように播くもので、ササの地上部を刈り取り、泥炭地面を覆うリターを取り除くことで、2年で被度80%以上までミズゴケを活着・増殖できることが明らかになった。また、泥炭表土を剥ぎ、相対的に地下水位を高くすると、出現するのは周辺の湿原構成植物がほとんどであるが、一部埋土種子由来と考えられる種が確認された。ただしこの地区の地下水位状況は...
• 寒冷地の農業流域河川における自然浄化作用に関する研究

  文部科学省：科学研究費補助金(奨励研究(A))

  Date (from‐to) : 2000 -2001 

  Author : 山本 忠男

   

  (1)昨年と同じ地区で調査をおこなった。パンケウレトイ川流域の土地利用は、上流部に農地(改修河川区間)、下流部に林地(自然河川区間)が展開している。この河川で定期的に採水(自然河川区間:500m間隔,改修河川区間:約1km間隔)し,水質分析をおこなった。その結果,T-N,NO_3-Nでは改修・自然河川に関わらず,流下にともない濃度低下する傾向にあった。しかしNO_2-N,NH_4-N,リン,SSでは改修河川区間で濃度が上昇し,自然河川区間で濃度が低下する傾向がみられた。とくに5〜6月にその傾向は顕著であった。(2)同様に負荷についてみると,すべての項目で濃度ほど明確な傾向はないが,5〜6月に改修河川区間で増加し,自然河川区間で減少する傾向があった。このことかち自然河川区間おける浄化作用の効果には,日射や植生の活性状況,気温,水温などの季節的な影響が関係していることが推察された。(3)自然河川区間からの流入負荷の影響を考慮した低減負荷量推定式を用いて自然浄化作用の定量化をおこなった。その結果,負荷についてみると自然河川区間であっても浄化作用効果が十分に発現しているとはいえないことが認められた。またタイルを敷設し,有機物付着量から自然浄化作用について検討をおこなったが,明確な傾向はみられなかった。以上が今年度の研究概要である。これまでのところ,湖沼と違って水の滞留が少ない河川では...
• RESEARCH ON STATE OF LAND SUBSIDENCE OF PEATLAND AND ITS MECHANISM

  Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(C))

  Date (from‐to) : 1999 -2000 

  Author : Takashi INOUE, 山本 忠男, 川端 伸一郎, 神谷 光彦

   

  The purpose of this research project is to clarify the state and the mechanism of large area subsidence in peatland after its opening for agriculture, and to estimate its future sink. The flat lowland of lower reaches of Ishikari River Basin, Shinotsu Mire, has been chosen as research site, where peat covers in wide range and in the average depth of 3 to 5 meters. We collected old and new maps and plans that involve information of ground height. The characteristics of peat were examined from peat boring. GIS was used for analysis of large area investigation and the functions that influences...
• Conservation of Water Related Environment of Watersheds with Agriculture and Forestry Landuse in Cold Region.

  Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(B))

  Date (from‐to) : 1997 -1999 

  Author : Tetuaki NAGASAWA, 工藤 明, 佐藤 冬樹, 波多野 隆介, 井上 京, 山本 忠男

   

  In this project, researches were made on water and material circulation, water use and rural area management, sustainable agriculture and environmental conservaion for the agricultural and forest area in cold regions.1) Relation between land use and river water quality was investigated on Shubuto river basin, southwestern Hokkaido. Watershed including agrictural land shows high concentrations on water quality when the amount of retained water in the watershed gets less.2) Characteristics of changes in water quality during snowmelt period were investigated using the principal component analy...

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