Demonstration Erosion Control Project Monitoring Program. Fiscal Year 1993 Report. Volume 5: Appendix D, Comparison of Distributive Versus Lumped Rainfall-Runoff Modeling Techniques
2006
Johnson, Billy E.
Original contains color plates: All DTIC reproductions will be in black and white.
Показать больше [+] Меньше [-]The purpose of monitoring the Demonstration Erosion Control (DEC) project is to evaluate and document watershed response to the implemented DEC project. Documentation of watershed responses to DEC Project features will allow the participating agencies a unique opportunity to determine the effectiveness of existing design guidance for erosion and flood control in small watersheds. The monitoring program includes 11 technical areas: stream gaging, data collection and data management, hydraulic performance of structures, channel response, hydrology, upland watersheds, reservoir sedimentation, environmental aspects, bank stability, design tools, and technology transfer. This appendix presents the results of three hydrologic modeling techniques that have been compared to observed data to assess the accuracy of the computed hydrographs. The principal objective of this study was to evaluate a new two-dimensional spatially distributed hydrologic model versus observed watershed rainfall and streamflow data. An additional objective was to compare the results to traditional methods for estimating rainfall-runoff used in the Corps of Engineers HEC-1 Flood Hydrograph Package computer model. This study was performed with the primary goal of determining whether a two-dimensional approach to hydrologic modeling using spatially varied data would perform at least as well as traditional unit hydrograph methods for estimating rainfall- runoff over an ungaged watershed.
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