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A model for estimating time-variant rainfall infiltration as a function of antecedent surface moisture and hydrologic soil typeRecent research indicates that the use of remote sensing techniques for the measurement of near surface soil moisture could be practical in the not too distant future. Other research shows that infiltration rates, especially for average or frequent rainfall events, are extremely sensitive to the proper definition and consideration of the role of the soil moisture at the beginning of the rainfall. Thus, it is important that an easy to use, but theoretically sound, rainfall infiltration model be available if the anticipated remotely sensed soil moisture data is to be optimally utilized for hydrologic simulation. A series of numerical experiments with the Richards' equation for an array of conditions anticipated in watershed hydrology were used to develop functional relationships that describe temporal infiltration rates as a function of soil type and initial moisture conditions.
Document ID
19830008546
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Wilkening, H. A. (Maryland Univ. College Park, MD, United States)
Ragan, R. M. (Maryland Univ. College Park, MD, United States)
Date Acquired
September 4, 2013
Publication Date
October 1, 1982
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
CP-52-04372
NASA-CR-169776
NAS 1.26:169776
E83-10142
Accession Number
83N16817
Funding Number(s)
PROJECT: PROJ. AGRISTARS
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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