虎跳峡水电站可能最大洪水(PMF)地区组成研究

A Study on Local Probable Maximum Flood Combination at the Hutiao Gorge Water-Power Station

可能最大洪水的地区组成多年来一直是可能最大暴雨及洪水计算理论体系中有待进一步明确的问题。目前我国还没有一套较完整规范地推求可能最大洪水地区组成的计算方法。本文着重介绍的是一种根据可能最大暴雨及洪水计算原理,依照可能最大洪水的地区组成来推求水电站坝址可能最大洪水的方法。并论证了方法的合理性。该方法比较适用于水电站坝址流域由不同气候区域组成,上游洪水主要由高山融雪(冰)水组成的情况。

The local probable maximum flood combination is always the academic problem that we should make clearer in PMP/PMF calculation. Nowadays, there is still no normative method for ascertain of the local probable maximum flood combination. According to the principle of PMP/PMF calculation, this paper introduces a method for calculating of the probable maximum floods at the location of water-power station base on the local combination of the probable maximum floods. The rationality of the method has been demonstrated. The result shows that method is suitable to the basins of the water-power stations that consists of different climatic zones, and the upriver floods that consist of mountain snowmelt/ melting ice.