改进的MIKE BASIN在水库调节计算中的应用

Application of Improved MIKE BASIN in the Calculation of Reservoir Regulation

针对MIKE BASIN模型在进行水库调节计算时不能自动试算满足设计保证率要求的水库可供水量,应用“二分法”改进MIKE BASIN模型,实现改进程序自动试算可供水量。将改进的模型应用到崆峒水库改扩建工程实例中,计算上游调水对崆峒水库可供水量的影响。分别计算上游不调水条件下水库现状年及规划年可供水量、上游调水条件下水库灌区节水和不节水两种工况下水库可供水量、水库扩建后灌区节水工况下水库可供水量等5种方案的可供水量。结果表明,改进的模型能够对5种方案自动循环迭代寻优,计算出满足设计保证率要求的可供水量、缺水时长和供水保证率。改进后的模型结合了MIKE BASIN和EXCEL宏的优点,可大大方便工程设计人员进行水库可供水量计算。

MIKE BASIN model can not automatically calculate the available water supply that meets the design guarantee rate. The model was improved by using the dichotomy method to realize the automatic trial calculation of the available water supply. The improved model was ap plied in the example of the reconstruction and expansion reservoir for calculating the impact of upstream water transfer. The improved model was used to calculate the available water supply of kongtong Reservoir in the current year and the planned year under the condition of up stream non water transfer. Under the condition of water saving and non water saving in the irrigation area, the improved model was used to calculate the available water supply of the reservoir when upstream water transfers. After the expansion of the reservoir,the model was used to calculate the available water supply under reservoir expansion and water saving in the irrigation area. The results show that the improved mod el can automatically calculate the available water supply and the water shortage period and the water supply guarantee rate of 5 groups of schemes. The improved model not only utilizes the advantages of MIKE BASIN, but also combines the advantages of EXCEL macros to a chieve deep coupling, which greatly facilitates the engineering designer to calculate the available water supply of the reservoir.