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Streamflow routing on computer by characteristics
Author(s) -
Amein Michael
Publication year - 1966
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/wr002i001p00123
Subject(s) - hydrograph , streamflow , routing (electronic design automation) , base flow , flow (mathematics) , channel (broadcasting) , flood myth , hydrology (agriculture) , flow routing , river flood , geology , environmental science , computer science , mathematics , geotechnical engineering , geometry , computer network , geography , drainage basin , cartography , archaeology
A procedure for the numerical solution of the equations of unsteady flow on a digital computer by the method of characteristics, for application to gradually varied free surface flow problems, is presented. The initial and boundary values considered appropriate for streamflow routing are prescribed. An implicit iterative method for the treatment of frictional effects believed to be troublesome in unsteady gradually varied flows is given. The procedure is applied to the routing of a flood hydrograph through a channel. It is shown that friction forces alone can reduce flood peaks and stretch out the time base of the hydrograph and that they are responsible for the long recession tail. (Key words: Streamflow; computers, digital; hydrology.)