水力学耦合水文学模型在沮漳河河溶水文站洪水水位预报的应用研究

Hydraulics coupling hydrological model at Juzhang River Herong hydrological station application of flood water level forecast

为解决目前在变动回水影响下采用传统水文模型进行水文站水位预报面临的困难,本文研究采用水文模型与水力学模型相结合的方法进行洪峰水位预报,以沮漳河河溶水文站洪水水位预报为例,从河溶水文断面到鸭子口断面运用水力学模型,采用常糙率和变糙率两种方法进行洪水水位预报,结果表明使用变糙率方法预报精度更高。其结果对沮漳河流域水文预报具有一定的指导意义。

In order to solve the difficulty of using traditional hydrological model to forecast the water level of hydrological station under the influence of fluctuating backwater.This paper studies the method of combining hydrological model and hydraulic model to forecast flood peak level.Taking flood level forecast of Juzhang River Herong Hydrological Station as an example,hydraulic model is applied from Herong Hydrological Section to Yazikou Section,and two methods of constant roughness and variable roughness are used to forecast flood level.The results show that the prediction accuracy is higher by using the variable roughness method.The results have certain guiding significance for hydrological forecasting in Juzhang River Basin.