为提高水系河网水动力模拟的稳定性和计算效率,采用了汊点水位预测校正法(JPWSPC)处理缓流河网汊点和结构物连接处的回水效应,综合工程因素,建立了工程实例的河网一维水动力模型,计算分析了不同引水(分水)方案下河道水位过程和水力停留时间的变化。结果表明:在蓄水建筑物调蓄条件下,不同引水流量对河道水面面积和景观效果区别不大,河道的水力停留时间则与过流流量密切相关。通过优化调整引水量及河道分流比的模拟计算,为保证水资源高效利用、降低引水经济成本提供技术依据。
Abstract
In order to improve the stability and computational efficiency of hydrodynamic simulation, a method of junction-point water stage prediction and correction(JPWSPC)is proposed to deal with the backwater effects at the junctions between general open-channel networks and hydraulic structures. On this basis, a one-dimensional hydrodynamic model is established to calculate the variations of water level process and hydraulic detention time under different water diversion demands. Results show that in the presence of diversion and storage of hydraulic structures, different diversion flow has no obvious effect on water areas and water landscapes; while hydraulic detention time is closely related to overflow discharge. Through optimizing and adjusting diversion flow and diversion ratio, the model provides a technical basis for ensuring efficient utilization of water and reducing economic costs.
关键词
JPWSPC /
一维水动力模拟 /
引水量 /
水力停留时间 /
过流流量
Key words
junction-point water stage prediction and correction /
one-dimensional hydrodynamic simulation /
water diversion demand /
hydraulic detention time /
overflow discharge
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参考文献
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