五强溪水库汛期水位动态控制运用研究

Study on water level dynamic control of Wuqiangxi Reservoir during plood season

沅水的洪水特性分析与降低五强溪水库汛期限制水位的防洪作用及其对电站效益的影响分析表明,五强溪水库主汛期防洪限制水位由设计的98m降低到94～96m运行,对电站的发电运行有较大的影响,而所能增加的防洪作用有限。计算表明,通过预报预泄在洪水预见期内可将五强溪水库起调水位降低3～5m,可起到同样的防洪作用。为此提出,在实际运用中应结合气象水文条件并考虑预报预泄措施,对该水库实行分时段汛期水位动态控制运用。这样可更好地协调防洪与发电的矛盾。

The results of studying the flood features of the Yuanshui River and findings of analyzing the flood control effect by lowering the Wuqiangxi Reservoir limited water level during flood season on the power generation benefits have indicated that the reduce of 98m design flood limited water level of Wuqiangxi reservoir during flood season down to 94～96 m would bring about a great influence on the power generation operation and an unconsidered increase of flood control function. The calculations have shown that reducing 3～5 m initial water level of Wuqiangxi reservoir by applying forecasting and pre-discharging in the forecast period could take an active role of flood control. For this reason, this paper outlines a use of dynamic water level control at different periods upon the meteorological and hydrological conditions as well as flood forecasting and pre-discharging, and a better coordination of flood control and power generation.