| Project/Area Number |
05660274
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Shimane University |
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Principal Investigator |
FUKUSHIMA Akira Shimane University, Faculty of Agriculture, Professor, 農学部, 教授 (90027251)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1994: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1993: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Runoff model / Flood runoff / Runoff analysis / Hydrograph / Basin model / Channel network |
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| Research Abstract |
This study discusses a runoff model for flood analysis, in which is aimed to analyze a runoff phenomena considering the chracteristics of land-use pattern in a drainage basin. The following results are obtained :
1) The runoff model, which is named KiWS Model (Kinematic Wave Storage Model), iscombied kinematic wave runoff model with LST-II Model (the Long and Short Terms Runoff Model ; Kadoya, M.and A.Magai, 1988). Namely, the upper zone of the model is composed by kinematic wave model and the lower zone of one is the same with the LST-II Model.
2) The effctive rainfall concerned in the surface runoff and/or prompt subsurface runoff is automatically computed in KiWS Model.
3) The routine phases of rainwater flow on hillslope and/or field plane and stream flow in stream network are expressed by the kinematic wave model, in which the effective rainfall series are given as input condition corresponding to land-use of each basin block.
4) By a runoff simulation considering the effects of basin development, it is shown that the KiWS Model is expected to apply as a practical model to runoff analysis for for multiple land-use basin.
5) A modified method of runoff analysis is proposed and examined to apply the LST-II Model to the distributed type of basin model. And it is shown that the modified LST-II Model can be possible to utilize the flash flood forecasting in the basin involved partial developed and/or urbanized area.
6) In the flood routine system, the delayd rainfall sequence is used as input condition to the LST-II Model. And it is shown that the reproducibility of observed hydrograph is improved about 10% by the modified method than the original one.
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