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针对汾河中下游河道特点,基于水流连续方程及运动方程,建立了一维洪水演进模型,利用该水力学模型对汾河兰村—义棠段洪水进行了数值模拟,并结合生态指标,分析了该河段生态需水量。结果表明,流量过程计算值与实测值吻合较好,以河道不断流为生态流量指标,获得汾河河道不断流的生态需水量为5 m3/s,对汾河水库生态调度和河道治理有一定的参考价值。
Aimed at the characteristics of the middle and lower reaches of Fenhe River, a one-dimensional flood evolution model was established based on the continuous flow equation and the equation of motion. The flood model of Lancun-Yitang segment in Fenhe was numerically simulated by using the hydraulic model. Combined with the ecological indicators, The river ecological water demand. The results show that the calculated value of the flow process is in good agreement with the measured value. Taking the continuous flow of the river as an indicator of ecological flow rate, the ecological water demand of Fenhe river continuous flow is 5 m3 / s, and there is a certain degree of ecological regulation and river regulation in Fenhe Reservoir The reference value.