多重地貌环境下水库径流计算方法浅析

Analysis of Reservoir Runoff Calculation Method under Multiple Geomorphic Environment

澄城县骨干供水工程从石堡川水库引水到县城水厂,以解决县城和北部塬区居民生活用水问题。石堡川水库是澄城县骨干性水利枢纽工程,由于流域中上游为高山林区,下游为黄土塬区,且流域内没有水文站,因此水库年径流计算只能运用气象资料进行计算。在充分考虑水库工程的气候及下垫面、植被等诸多因素的影响后,采用分区叠加法计算水库径流,并将计算结果与《渭南地区水文手册》提供的多年平均径流系数结果进行对比,两种方法计算结果比较接近,年径流量相差不大,因此本次提出的计算方法切实可行,为工程区径流调节提供技术依据。

In Chengcheng County, Gugan water supply project is from Shi Baochuan reservoir diversion to the county water plant aim to solve residents＇ living water problem in the county and the northern plateau. Shibaoehuan reservoir is key water conservancy project in Chengcheng County. As the upper reaches of the basin are alpine forest areas and the lower reaches is the Loess Plateau area, there is no hydrological station in the basin. Therefore, the annual runoff calculation only can be calculated using meteorological data. After considering the climatic and underlying surface vegetation and vegetation factors of the reservoir project, the runoff of the reservoir is calculated by the partition superposition method, and the results are compared with the results of the multi-year average runoff coefficient provided by the Weinan Regional Hydrological Handbook. The calculated results are close each other, and the annual runoff is not very different. Therefore, the proposed method is feasible and provides the technical basis for the runoff regulation.