Generation of Synthetic Design Storm Hyetograph and Hydrologic Modeling under HEC HMS for Ziz Watershed
Ismail Elhassnaoui1, Zineb Moumen2, Issam Serrari3, Ahmed Bouziane4, Driss Ouazar5, Moulay Idriss Hasnaoui6

1Ismail Elhassnaoui, Mohammadia School of Engineers, University Mohammed V,Rabat-Morocco.
2Zineb Moumen, Department of Geo-resources and Environment, University of Sidi Mohammed Ben Abdellah / Faculty of sciences and technologies, Fez, Morocco.
3Issam Serrari, is a Rural Engineer graduated from Hassan II Institute of Agronomy and Veterinary (IAV-Hassan II).
4Ahmed Bouziane, Mohammadia School of Engineers, University Mohammed V, Rabat-Morocco.
5Driss Ouazar, Mohammadia School of Engineers, University Mohammed V, Rabat-Morocco.
6Moulay Driss Hasnaoui, Water resource departement, the Ministry Delegate to the Ministry of Energy-Rabat Morocco.

Manuscript received on 01 August 2019 | Revised Manuscript received on 07 August 2019 | Manuscript published on 30 August 2019 | PP: 32 | Volume-8 Issue-10, August 2019 | Retrieval Number: J12140881019/2019©BEIESP | DOI: 10.35940/ijitee.J1214.0881019
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Abstract: This article proposes a methodology for generating hourly rainfall from daily rainfall data. It was evolved as a tool for managing flood risks on Ziz catchment, by means of Intensity-duration-frequency curves (IDF) and designed hyetograph of Chicago. The study area is located in the south-eastern part of Morocco, and did not have a monitoring station for hourly rain measure, the methodomogy consist of determinating the rainfall intensity for 24 h using IDF, then estimating the hourly rainfall using Chicago formula, in order to assess the accuracy of the method the resulting hyetographs was introduced into the semi-distributed hydrological model HEC HMS to simulate hourly flow, which was compared to the observed one. The obtaining results exhibit that the observed value is positively correlated with those obtained by the above method, as shown by the correlation coefficient and the Nash-Sutcliffe. This approach can deal with instantaneous water management issues by tackling flood risks and providing an appropriate range of data for the dam’s management.
Index Terms: Chicago Rainfall, Gumbel Distribution, HEC HMS, IDF Curves, SCS Curve Number, Ziz Watershed.

Scope of the Article: Next Generation Internet & Web Architectures