Document Details
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Document Type |
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Thesis |
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Document Title |
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Areas at risk of torrential rains in Wadi Bisha basin in the Kingdom of Saudi Arabia using geographic information systems and remote sensing technology. المناطق المعرضة لخطر السيول بحوض وادي بيشة في المملكة العربية السعودية بإستخدام تقنية نظم المعلومات الجغرافية والأستشعار عن بعد |
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Subject |
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Faculty of Arts and Humanities |
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Document Language |
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Arabic |
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Abstract |
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The study aimed to highlight the impact of each of the geological, topographical and climatic characteristics on the occurrence of flashflood in Wadi Bisha basin, and to take advantage of the geographic information systems and remote sensing techniques in extracting the morphometric and hydrological characteristics of the sub-drainage basins and applying spatial modeling to produce a map to classify the sub-drainage basins according to their degree of hazard, and to identify the highly hazards valleys. The study used the regional and fundamentalist approach and the descriptive analytical approach, as well as the geographic information systems method, the statistical and cartographic method. The study concluded that the areas exposed to the flashflood hazard in Wadi Bisha basin were affected by three factors: the morphometric variables of the drainage basins with a variance of (52.5%), the hydrological variables with a variance of (26.1%), and the morphometric variables of the drainage network a variance of (11.9%) according to the interpretations of the factor analysis, and the areas exposed to the flashflood hazard were classified into high-risk basins that include the main Bisha and Rania valleys, medium-risk basins that include Tabala, Taraj and Harjab basins, and low-risk basins that include Wadi Khrus basin only. The study recommended confronting the phenomenon of indiscriminate urban expansion on agricultural areas and natural grassland areas, especially around urban areas in the main Bisha Valley, to preserve the soil from erosion, regulate water consumption from water resources, monitor climate changes and fluctuations in rainfall to confront decreasing drainage in water basins, and conduct detailed studies to establish a number of small storage dams on the streams of the main valleys, which are characterized by abundant water flow to contribute to the provision of water resources and the adoption of modern water storagesystems to feed underground reservoir systems based on the movement of groundwater and structural barriers th1at affect the hydrogeological system of Wadi Bisha basin. The study also recommends the establishment of a center for monitoring the hydrogeomorphological characteristics in Wadi Bisha basin, which allows the provision of accurate data and digital maps of hydrological systems and their characteristics, and presents them to decision makers in the concerned authorities, and use of geographic information systems and remote sensing techniques to provide basic data for managing water storingin Wadi Bisha and integrating them with soil management systems, water resources, pastures, agricultural and urban land management. |
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Supervisor |
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Dr. Firdous Mohammad al-Madani |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1444 AH
2023 AD |
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Added Date |
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Thursday, August 10, 2023 |
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Researchers
| ندى سعد الشمراني | Al-Shamrani, Nada Saad | Researcher | Master | |
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