1999 Fiscal Year Final Research Report Summary
Environmental Conservation and Agricultural land Use in Toyama Valley, Upper Watershed of Tenryu River
| Project/Area Number |
09660256
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | SHINSHU UNIVERSITY |
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Principal Investigator |
HOSHIKAWA Kazutoshi Shinshu University, Fac. of Agriculture, Professor, 農学部, 教授 (40115374)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Jun Shinshu University, Fac. of Agriculture, Assistant Professor, 農学部, 助教授 (40262696)
KIMURA Kazuhiro Shinshu University, Fac. of Agriculture, Professor, 農学部, 教授 (40021092)
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| Project Period (FY) |
1997 – 1999
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| Keywords | Tenryu River Watershed / Agricultural Village / Traditional Agro-technique / Abandoned Agricultural Field / Soil Conservation / Agriculture in Mountainous Area / 耕地放棄 |
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| Research Abstract |
1. Simoguri, typical agricultural village in Toyama valley, was selected as a studying area. There is Simoguri in the mountainous area and is an upland farm village with steep and complicated topology. We observed meteorological factors (air temperature, soil temperature, precipitation, and solar radiation) and measured soil erosion damages at the some cropping fields. The relationships between farming method and agricultural fields, such as cultivating crop, cropping calendar and soil conservation methods, were examined.
2. Our analysis of the topo-meteorological factor at the study area demonstrates that Simoguri has relatively favorable climate conditions on the cropping production but tends to receive damage of the soil because of it's being on the steep southern slope of a mountain.
3. Although the agriculture at the study area is a subsistence farming with traditional technique which is multi crop cultivation without mechanization, there is little damage of the soil on the cropping field. Consequently, the traditional cropping system and technique take an important role in the soil conservation and the environmental management.
4. According to the agricultural census, the abandoned agricultural field increases in Toyama Valley. This problem in mountain region becomes worse due to the progress of depopulation and the increase of old person in the last twenty years.
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