直接流出成分への有効降雨と低水流出高曲線の一推定法

島根大学農学部研究報告 Volume 21 Page 78-87 published_at 1987-12-21
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Title
直接流出成分への有効降雨と低水流出高曲線の一推定法
Title
An Estimation Method of Effective Rainfall to Component of Direct Runoff and Curve of Base Flow Height
Title Transcription
チョクセツ リュウシュツ セイブン エノ ユウコウ コウウ ト テイスイ リュウシュツコウ キョクセン ノ イチスイテイホウ
Creator
Tanaka Reijiro
Source Title
島根大学農学部研究報告
Bulletin of the Faculty of Agriculture, Shimane University
Volume 21
Start Page 78
End Page 87
Journal Identifire
ISSN 0370940X
Descriptions
This paper is concerned with procedures of synthesizing effect rainfall to direct runoff component and curves of base flow height, in which a runoff model named KWST model(Runoff Model combined Kinematic Wave and Storage Tanks) is developed.
The upper zone of the model is composed by kinematic wave runoff model. The lower zone is the same with the storage model proposed by Kadoya and Nagai. The estimation method of the effective rainfall concerned in the surface runoff and/or prompt subsurface runoff is shown in the model.
A runoff cycle of base flow is divided into five stages. The first and second stages are related to rainless periods. The recharge of base flow occurs during other stages. The recharge of delayed subsurface flow and groundwater runoff is evaluated by KWST model. The equations of runoff height of base flow for each stages are derived by using of model pararameters.
The parameters of KWST model are identified by the flood runoff analysis at the Shimokari hilly watershed of 1.3<km>^^^2. It is shown that the estimated curves of base flow are different from the evaluated curves by the usual hydrograph analysis in flood runoff and more rational expression than the usual method for analysis of the base flow phenomena. And it is pointed out that the estimation method of base flow by KWST model is especially useful for the complicated runoff occuring the multipul peak discharge.
Language
jpn
Resource Type departmental bulletin paper
Publisher
島根大学農学部
Shimane University, Faculty of Agriculture
Date of Issued 1987-12-21
Access Rights open access
Relation
[NCID] AN00108015