Analysis of Environmental Change in the catchment : Impact assessment of abandonment of management practices in Satoyama using fallout radionuclides

• Project/Area Number: 21710030
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Environmental impact assessment/Environmental policy
• Research Institution: Shinshu University
• Principal Investigator: FUKUYAMA Taijiro Shinshu University, 農学部, 助教 (60462511)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: 中山間地域 / 里山の管理放棄 / 貯水池堆積物 / 放射性降下物 / 堆積年代推定 / 空中写真判読 / 土地利用履歴調査 / 里山 / ため池 / 堆積物柱状試料 / 堆積年代 / 土砂流出 / 土地利用

Research Abstract

To assess the impact of land-use change in Satoyama catchment on sediment delivery, I investigated the land-use history based on aerial photography. Additionally, using sediment core sample retrieved from small reservoir, I tried to estimate the long-term erosion history in the catchment based on dating technique for sediment. Sedimentation rate was significantly decreased when the dominant plant species was converted from deciduous broad-leaved forest to conifer plantation.