水电规划对金沙江攀枝花河段水文情势影响研究

采用数学模型法及对比分析法对观音岩水电站坝址至银江水电站间的金沙江河段因水电站壅水及水库调蓄作用导致的水文情势发生的变化进行了研究。本文研究的河段长约63 km，重点水域为金沙江格里坪到雅砻江河口长约38 km河段，重点时段为鱼类繁殖季节3～6月的典型日。研究结果显示，金沙江攀枝花河段金沙、银江两级开发方案实施后，将抬高银江水电站坝址至观音岩水电站坝址河段水位，增加河道水深、河宽和水域面积。两库区河段的泥沙淤积均不明显，而研究河段典型日的流量、水位和流速等水文情势将比零方案在时空上发生显著变化。

Study on impact from hydropower planning on hydrological regime of Panzhihua Reach of Jinshajiang River

Based on the relevant math model and comparative analysis， the change of hydrological regime in the river reach of Jinshajiang River from the site of Guanyinyan Hydropower Station to Yinjiang Hydropower Station caused by the dammed water of hydropower station and the regulation effect of reservoir is studied herein. The length of the study reach is about 63 km， in which the key water area of the river reach is from Geliping of Jinshajiang River to the mouth of Yalongjiang River with a length of 38 km， while the typical days for the study are within the key period from March to June during the fish-breeding season. The study result shows that the water level of the river reach from the site of Yinjiang Hydropower Station to the site of Guanyinyan Hydropower Station is to be raised after the implementation of the scheme of the two-stages developments of both Jinsha and Yinjiang hydropower Stations on Panzhihua Reach of Jinshajiang River and， accordingly， the water depth， river width and water area of the river channel are to be increased as well. However， the sedimentations in both the river reaches of the reservoir areas for the hydropower stations are to be not obvious， nevertheless， the hydrological regimes such as the flow rate， water level， flow velocity， etc. of the study reach in the typical days are to be spatiotemporally changed significantly if compared with those from the relevant zero scheme mentioned in this paper.