IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 33rd Congress - Vancouver (2009) : Topic A: Advances in the Fundamentals of Water Science and Engineering : Evaluation of sediment transport module within the hydrologic modeling system (hec-hms) for the uppe...
Evaluation of sediment transport module within the hydrologic modeling system (hec-hms) for the upper north bosque riverwatershed in central texas
Author : J. H. Pak, M. H. Fleming, W. A. Scharffenberg, and P. B. Ely
The effects of surface erosion and stream sediment loading in watersheds have become increasingly important in watershed management and natural resources conservation planning studies and for the evaluation and implementation of water quality best management practices (BMPs) and the evaluation of TMDLís. Many water resources studies must now consider erosion related effects of watershed activities. Surface erosion models describe the detachment, deposition, and transport of soil particles by the erosive forces of raindrops, surface flow of water, and channel routing from the point of origin to the watershed outlet. The U.S. Army Corps of Engineers Hydrologic Engineering Centerís Hydrologic Modeling System (HEC-HMS) is a computer program designed to model watershed hydrology. Historically, HEC-HMS has focused on modeling rainfall-runoff processes; however, new tools have been added for sediment and water quality modeling. Output from these new tools could be used for making informed decisions about managing soil erosion within the watershed. An HEC-HMS model was developed for the Upper North Bosque River watershed (UNBRW), located in central Texas, where average daily flow and sediment loading were simulated. Results were evaluated by comparing measured flows and sediment loadings at locations within the basin. The HEC-HMS model was calibrated for the period of January 1995 through December 1996 and verified for the period of January 1997 through December 1998 with measured flow and sediment data. Results show that the HEC-HMS model provided reasonable predictions of average daily flow and sediment loadings during the calibration and validation periods at the sampling sites within the UNBRW.
File Size : 260,667 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 33rd Congress - Vancouver (2009)
Article : Topic A: Advances in the Fundamentals of Water Science and Engineering
Date Published : 09/08/2009
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