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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
Title Alternative
An Estimation Method of Effective Rainfall to Component of Direct Runoff and Curve of Base Flow Height
File
language
jpn
Author
Fukushima, Akira
Tanaka, Reijiro
Description
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.
Journal Title
Bulletin of the Faculty of Agriculture, Shimane University
Volume
21
Start Page
78
End Page
87
ISSN
0370940X
Published Date
1987-12-21
NCID
AN00108015
Publisher
島根大学農学部
Publisher Aalternative
Shimane University, Faculty of Agriculture
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Faculty of Life and Environmental Science