Document Details
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Document Type |
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Thesis |
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Document Title |
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ENGINEERING GEOLOGICAL MAP AND SAND DUNE HAZARDS BETWEEN JEDDAH AND MAKKAH CITIES, MAKKAH REGION, SAUDI ARABIA الخرائط الجيولوجية الهندسية وخطر الكثبان الرملية بين مدينة مكة المكرمة ومدينة جدة |
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Subject |
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Faculty of Earth Sciences |
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Document Language |
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Arabic |
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Abstract |
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The Area between Jeddah city and Makkah city in the Kingdom of Saudi Arabia is one of the most promising sector for future development and planning activities. It is located to the south east of Jeddah city and southwest of Makkah city, covering an area of (600) km2. The present study aims to establish an engineering geologic mapping and sand deposits hazard evaluation for the area under consideration. To achieve this approach, physical and engineering characteristics of surface soil and/or rocks of the study area were evaluated. Several data sources were used including: geologic and topographic maps, satellite images, previous data and reports, and detailed field and laboratory investigations of soil and rocks. An engineering geology mapping of the area was prepared using GIS environment. It classifies the area into twelve different zones according to the physical and geotechnical properties. In addition, the sand deposits hazards were recognized and investigated. The study indicated that there are four types of sand deposits including sand dunes (barchan, barchan-ridge, and longitudinal), sand sheets (cover flat area), sand accumulations (along the mountain slopes), and Ne-back type (in grass areas). Origin of sand deposits were suggested according to the severe weathering of the Al-Hijaz Mountains that located to the east of the study area. The weathered sandy materials were transported by running water along wadis and streams and deposited them again forming the flood plain and costal sand deposits. Under the effect of wind actions, these sand deposits move inland forming different types of sand debedies. The NE-SW direction of the sand movement was determined. Sand deposits types were mapped by using remote sensing techniques and detailed field investigations. The prepared map shows the distribution of sand dunes/sand sheets/ sand accumulations/ Ne back in the study area. Our findings showed that sand dunes/sheets/accumulation/Ne-back pose some geological hazards on roads, surrounding buildings and constructions and may cause some hazards for future development. Different remediation methods have been assigned to protect and minimize these geological hazards in the study area.
Keyword's: Engineering geology mapping, Sand deposits, geological hazards, GIS, Remote sensing, Hazards, Remediation |
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Supervisor |
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Prof. Dr. Abbas Al-Harthi |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1438 AH
2017 AD |
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Added Date |
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Wednesday, August 16, 2017 |
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Researchers
| ياسر ادم زبرماوي | Zbarmawi, Yasser Adam | Researcher | Master | |
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