Settling Simulation of a Muddy Reservoir for Identifying Problematic Turbidity to Selective Withdrawal
The capacities of reservoirs in Taiwan are relatively small compared to the flow volumes of ordinary large floods. The immense sediments left by a flood usually entail the reservoir full of muddy storage composed of fine-sized adherent sediments. The slow clarification of muddy lake usually results in water supply disruption due to the untreatable high turbidities of raw water. In this paper, a unidimensional settling model of cohesive particles based on Kynch s theory of sediment flocculation is presented. This model simulates the settling of sediment flocculation in a reservoir, which is conceptualized as a large vessel of varying cross-section with multiple outflows at intakes of different elevations. The parameters of this settling model were calibrated using data from laboratory settling experiments. The calibrated model was further implemented to simulate the settling process of muddy storage in Shihmen Reservoir following Typhoon Aere in 2004. Simulations were performed using hypothetical operating strategies with an under-construction sluiceway. The result confirmed the effectiveness of sluicing bottom storage through the sluiceway to accelerate settling. Nevertheless there will be critical shortage potential due to limited turbid water withdrawn downstream of the reservoir which comes from the turbid bottom release. A backup storage pond or trans-basin clear water transfer plan will be necessary for maintaining stable public water supply in this area.
muddy reservoir selective withdrawal turbidity settling simulation
Chia - Wen Wu Frederick N. -F. Chou
Department of Hydraulic and Ocean Engineering, Cheng Kung University, 1 University Road, Tainan 701, Taiwan, China
国际会议
郑州
英文
1704-1712
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）