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Development of a Coupled Hydrological/Sediment Yield Model for a Watershed at Regional LevelDevelopment of a hydrologic model for the study of environmental conservation requires a comprehensive understanding of individual-storm affecting hydrologic and sedimentologic processes. The hydrologic models that we are currently coupling are the Simulator for Hydrology and Energy Exchange at the Land Surface (SHEELS) and the Distributed Runoff Model (DRUM). SHEELS runs continuously to estimate surface energy fluxes and sub-surface soil water fluxes, while DRUM operates during and following precipitation events to predict surface runoff and peak flow through channel routing. The lateral re-distribution of surface water determined by DRUM is passed to SHEELS, which then adjusts soil water contents throughout the profile. The model SHEELS is well documented in Smith et al. (1993) and Laymen and Crosson (1995). The model DRUM is well documented in Vieux et al. (1990) and Vieux and Gauer (1994). The coupled hydrologic model, SHEELS/DRUM, does not simulate sedimentologic processes. The simulation of the sedimentologic process is important for environmental conservation planning and management. Therefore, we attempted to develop a conceptual frame work for coupling a sediment yield model with SHEELS/DRUM to estimate individual-storm sediment yield from a watershed at a regional level. The sediment yield model that will be used for this study is the Universal Soil Loss Equation (USLE) with some modifications to enable the model to predict individual-storm sediment yield. The predicted sediment yield does not include wind erosion and erosion caused by irrigation and snow melt. Units used for this study are those given by Foster et al. (1981) for SI units.
Document ID
20000032349
Document Type
Conference Paper
Authors
Rajbhandaril, Narayan (Alabama A & M Univ. Normal, AL United States)
Crosson, William (NASA Goddard Space Flight Center Greenbelt, MD United States)
Tsegaye, Teferi (Alabama A & M Univ. Normal, AL United States)
Coleman, Tommy (Alabama A & M Univ. Normal, AL United States)
Liu, Yaping (Alabama A & M Univ. Normal, AL United States)
Soman, Vishwas (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 19, 2013
Publication Date
February 22, 1998
Publication Information
Publication: NASA University Research Centers Technical Advances in Aeronautics, Space Sciences and Technology, Earth Systems Sciences, Global Hydrology, and Education
Volume: s 2 and 3
Subject Category
Earth Resources and Remote Sensing
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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