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Space‐time variability of low streamflows in river networks
Author(s) -
Furey Peter R.,
Gupta Vijay K.
Publication year - 2000
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 - 10.1029/2000wr900136
Subject(s) - base flow , groundwater recharge , hydrology (agriculture) , drainage basin , flow (mathematics) , groundwater flow , structural basin , environmental science , geology , streamflow , groundwater , aquifer , geotechnical engineering , geomorphology , geography , mathematics , geometry , cartography
A low‐flow equation is derived from Darcy's law and a mass balance equation for base flow from a hillside by assuming that groundwater recharge is constant over short time periods. This low‐flow equation reduces to many of the existing mechanistic low‐flow equations, but in its general form looks like a linear regression model and captures spatial variability in base flow among hillsides in a basin. As a result, it unifies the mechanics and statistics of low flows in river networks. This equation is tested against low‐flow data from the Flint River basin in Georgia and the Gasconade River basin in Missouri, both of which are approximately 7000 km 2 in size.