الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
In this study, Wadi EI-Meleiha which lies Western Sinai is taken as an
experimental basin to apply the capabilities of one of the most famous
techniques in simulating the rainfall-runoff relation. The model is used to
solve the hydrologic response of Wadi EI-Meleiha that represents similar
basins in Egypt. The main objectives of this study are: (I) to apply the
capabilities of the various methods involved in HEC-HMS package for
predicting surface runoff hydrographs, (2) to apply many approaches that
may be used to determine the hydrologic parameters for ungaged basins,
(3) to construct a hydrologic model to be used in simulating the rainfallrunoff
relationship in Wadi EI-Meleiha, (4) to determine an appropriate
design storm using the available historical rainfall data and apply it to the
constructed model to get the design volumes and discharges at many sites
throughout the watershed.
It appears through the analysis that the combination of a rainfall excess
estimating method with a unit hydrograph method has a significant effect
on the accuracy of the simulation. Analysis of mean errors indicates that
there is no significant difference in accuracy of modeled hydrographs
using the three methods of estimating rainfall excess (Initial and Constant
loss method, SCS method and Lag method) with Clark Unit Hydrograph.
Each of the three methods gives high accurate results with the SCS
dimensionless unit hydrograph (UH). The SCS loss method gives good
results only when applied the SCS dimensionless UH.
KEYWORDS: HYDROLOGY, RAINFALL-RUNOFF MODELS,
HEC-HMSl UNIT HYDROGRAPH.