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EVALUATION OF GRID-BASED DISTRIBUTED SEDIMENT DELIVERY RATIO MODELS
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 428-433 in Total Maximum Daily Load (TMDL) Environmental Regulations–II Proceedings of the 8-12 November 2003 Conference (Albuquerque, New Mexico USA), Publication Date 8 November 2003. .(doi:10.13031/2013.15592)
Authors: M. A. Al-Smadi1 and C. D. Heatwole
Keywords: Spatial distribution, SDR, GIS, sediment yield
The emphasis on a watershed-scale approach to management of water quantity and quality has
renewed the focus on hydrologic/water quality modeling at that scale. While the most widely
used modeling approach to TMDLs continue to be a lumped approach using HSPF, there is also
ongoing development of models that use a distributed parameter approach. In addition to the
more traditional language-based simulation models, we are also seeing the development of some
new modeling approaches that provide a spatially dynamic model built within a geographic
information system (GIS) using the native GIS functions. The emphasis to date has been on
predicting hydrologic responses, but approaches for modeling water quality constituents have
also been developed.