Title

Assessing The Impact Of Subsurface Storage Contributing Area On The Watershed Scale Storage-Discharge Function Derived From Baseflow Recession At The Spoon River In Illinois

Keywords

Base flow recession; Contributing area; Storage-discharge function; Subsurface storage

Abstract

Storage-discharge functions based on the streamflow recession analysis are commonly used to estimate watershed water storages and fluxes (such as evapotranspiration) given streamflow observations. In this study, the impact of subsurface storage contributing area on the storagedischarge function at the Spoon River watershed in Illinois is investigated. The estimation of contributing area is based on the assumption that the water storage and evapotranspiration can be scaled by fraction of contributing area. For individual recession events during April to October, the initial contributing area fraction is determined by comparing the estimated evapotranspiration from the contributing storage and the estimated daily evapotranspiration at the watershed based on remote sensing data. Starting from the second day of a recession event, the contributing area fraction is estimated by water balance at the watershed scale. Based on the recession analysis conducted herein on the Spoon River watershed, if the fraction of contributing area is assumed to be constant and equal to one rather than a variable value, the result leads to underestimation of dynamic storage change and evapotranspiration. © 2012 ASCE.

Publication Date

9-17-2012

Publication Title

World Environmental and Water Resources Congress 2012: Crossing Boundaries, Proceedings of the 2012 Congress

Number of Pages

3770-3779

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1061/9780784412312.379

Socpus ID

84866104374 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84866104374

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