Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Estimation of different recurrence interval flood hydrographes using WMS and GIS programs in Jerash, Jordan

Ceraş, Ürdün’de WMS ve CBS programları kullanarak farklı tekerrür aralığı taşkın hidrograflarının tahmini

Auteur : SHANATI Albaraa

Université de soutenance : Karabük Üniversitesi

Grade : Master Thesis Civil Engineering 2021

Résumé
Jordan is a Middle Eastern country located in the south of Syria and west of Palestine, which was disturbed by sudden floods because it is located in an arid region that is permanently and severely exposed to weather factors. This thesis has been prepared to create a simulation model of the flash floods affecting Jordan, to show how the developing technology can be used for this purpose, to analyze the various factors that cause such natural disasters to occur. In one such event, more than 21 people died in 2020 due to the occurrence of rapid and short-term floods. During the hydrological study of the Jerash Basin area, we obtained rainfall records from the Jordanian Ministry of Water and Irrigation for 6 rain stations, where these records were 31 years for four stations and 17 years for two stations, and two of the 6 stations were inside the study area, while 4 stations were surrounding the study area. In this study, 12.5 m x 12.5 m resolution (Aster) images were used to model the Jerash Basin. Depending on the altitudes, the direction of the flow and the catchment area were determined, and the study area was found to be 101 square km. In the process of analyzing the rainfall records, the average, the largest, and the lowest values of precipitation for all stations in the study area were calculated by using the pivot table in Microsoft Excel. And by communicating with the University of Jordan, we obtained a soil map in addition to the hydrological classification of the soil of the study area, and we also obtained a land-use map. Through the two maps, the curve number for the study area was calculated based on the WMS program. Gumbel Type I distribution was applied to calculate the intensity-duration-frequency (IDF) curves for repetition periods of 2, 5, 10, 50, 100, 1000 years for each station by using the largest amount of precipitation obtained. And after that, we calculated the amount of runoff based on SCS, through an analysis process of both the runoff and the IDF curves, hydrographs of the study area were obtained the via WMS for different recurrence intervals. Finally, model accuracies were determined with historical flood records.

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