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A variable source area model of the rainfall‐runoff process based on the Watershed Stream Network
Author(s) -
Lee M. T.,
Delleur J. W.
Publication year - 1976
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr012i005p01029
Subject(s) - surface runoff , watershed , hydrology (agriculture) , storm , environmental science , drainage basin , streams , runoff model , watershed area , runoff curve number , structural basin , geology , geomorphology , computer science , geography , geotechnical engineering , cartography , ecology , computer network , oceanography , machine learning , biology
A model of the dynamic contributing area during a storm is formulated in terms of the history of precipitation in excess of B horizon permeability. The spatial dynamic contributing area along the main stream is obtained under the assumptions that the velocity of flow along the stream network is uniform, the drainage density is a constant within a given watershed, and the first‐order streams are uniformly distributed in the basin. The runoff from the dynamic contributing area is then routed through the synthesized stream network to obtain the direct runoff at the basin outlet by making use of a method based on the linearized Saint Venant equations. The model has been tested in several watersheds in the central United States.