澜沧江梯级电站建设对下游水文情势的影响

Effects of cascade hydropower development on hydrological regime of Lower Lancang River

根据对近40年的水文系列分析和梯级电站模拟计算,发现澜沧江梯级电站的兴建对出境处径流有着调节作用。这种调节作用削弱了雨季洪峰流量,提高了旱季流量,使澜沧江下游河段径流分配更加均匀。这种调节作用在小湾水电站和糯扎渡水电站建成后,将更加明显。

Based on the simulation of the existed cascade hydropower stations on the Lancang River and the data from the analysis on the hydrological series therein for near 40 years, it is found that the hydropower development on the river has the effect to regulate the outbound runoff, by which the runoff distribution in the Lower Lancang River is to be more uniform along with the decrease of the flood peak discharge in rainy season and increase of the flow rate in dry season, furthermore, the effect is to be more and more obvious after the comoletions of both Xiaowan Hydropower Station and Nuozhadu Hvdrooower Station.