Flood Risk Analysis in Western Saudi Arabia (PAP014501)

Código

PAP014501

Autores

Ali M. Subyani

Tema

Urban Floods

Resumo

Western region of Saudi Arabia, is characterized by extremely arid conditions. This area is also subject to flash flooding that occurs immediately after heavy, short rainstorms, resulting in loss of life, infrastructure, and property. This valuable and important area requires the development of sustainable structures that can withstand such flooding. In this study, a runoff model adapted from the Soil Conservation Service was built for the catchment of five selected ungauged dry wadis in the study area. Data from 16 rain gauges that have been recording the annual maximum daily rainfall for over 30 year records were analyzed and used to derive the Gumbel extreme value distribution for 25-yr, 50-yr and 100-yr return periods. Hydrographs for different return periods were drawn. Regional maps of maximum probable precipitation and probable maximum flood were also produced for the study area. These results will be helpful when decisions are made regarding the planning, management, operation, and maintenance of flood occurrences in this important area.