Estimating Sediment Yield and Morphological Changes in Dry Reservoirs: Case Study Wadi Assarin, Oman
Kantoush, SamehA ， Al-mamari, Mahmood M ， Al-harrasi, Tahani ， Saber, Mohamed ， Sumi, Tetsuya
2022-01-01 null null null(卷), null(期), (null页)
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影响因子:
The kinetic energy of infrequent extreme rainfall events like cyclones erodes soil in the wadi watershed in Oman. Estimating sediment yield, erosion and deposition processes, and reservoir sedimentation are vital for the efficient water resources management of dry environments with limited observation data and scientific understanding. This study aims to determine the sediment yield from a dam reservoir by conducting four field surveys for the Assarin dam in Oman (November 2017, September 2018, March and August 2019) to collect sediment levels from 19 sediment scale bars. Those data were computed using GIS to quantify the reservoir sediment volume.The link between rainfall-runoff, local erosion and sediment deposition along the wadi channel were assessed and developed.The correlation between trapping sediments and the accumulated rainfall depth was developed with a high coefficient (R-2=0.87). On the other hand, the flow rate was modelled for a series of rainfall events that contributed to reservoir sedimentation using the Rainfall-Runoff-Inundations (RRI) model. The discharge result shows reasonable agreements with deposited sediments in the dam reservoir.
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