Assessing the impacts of riverbed incision and smoothing on aquatic ecosystems in mid river segments
Project/Area Number |
21710247
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Single-year Grants |
Research Field |
Resource conservation science
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Research Institution | Hokkaido University |
Principal Investigator |
NEGISHI Junjiro 北海道大学, 大学院・地球環境科学研究院, 助教 (90423029)
|
Project Period (FY) |
2009 – 2011
|
Project Status |
Completed (Fiscal Year 2011)
|
Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
|
Keywords | 生態系保全 / 流域管理 / 氾濫原 / 河床低下 / 流域保全 / 底生動物 / 生息環境 / 底性動物 |
Research Abstract |
The dominant riverbed material in the mid segment of Kiso River has changed over time from sands and gravels to peat outcrops. In places, substantial riverbed incisions having> 20m water depth occurred probably because the loss of peat outcrop(few meters think) resulted in acute erosions of sandy deposits below. Furthermore, peat outcrop appeared to provide a suitable habitat for mayfly(Ephoron shigae), which is often considered as a pest, serving as a main source of huge swarms of adults in the area.
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Report
(4 results)
Research Products
(16 results)