2013 Fiscal Year Final Research Report
Influence of Seasonal Change of Forest Floor Cover Percentage on Water Discharge and Suspended Load from Watershed
| Project/Area Number |
23580199
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Forest science
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
ISHIKAWA Yoshiharu 東京農工大学, (連合)農学研究科(研究院), 教授 (70285245)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 水資源涵養 / 土壌侵食 / 林床合計被覆率 / シカ / 林床植生 / 浮遊土砂 / セシウム / 電気伝導度 |
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| Research Abstract |
Soil erosion rate, overland flow, forest floor cover percentage, throughfall, water discharge, turbidity, etc. were monitored on the forest slope and watersheds with an understory impoverished by the feeding of deer in Doudaira, Tanazawa Mountains. Following results were obtained. (1) The mechanism and influence of seasonal change of forest floor cover percentage on overland flow and soil erosion rate were clarified. (2) The relationship between erosion rate and suspended load, and the relationship between overland flow and water discharge in the streams were clarified. (3)The estimation methods for influence of decrease in understory by the feeding of deer and change in forest cover percentage on the seasonal change and annual change in water discharge and suspended load were proposed.
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