鲁布革水电站水库放空冲沙及效果分析

Analysis of sand sluicing effectiveness of reservoir escape of Lubuge Hydropower Station

鲁布革水电站水库库容小,入库泥沙含量大,泥沙淤积严重。为了延长水库使用寿命,充分发挥电站的经济效益,需每3～5年进行一次放空冲沙。1997年7月13～17日水库进行了放空冲沙,共冲出泥沙850万t,期间入库沙量350万t,基本达到了冲沙目的。冲沙效果推算和分析表明,如水库采用放空明流冲沙效果会更好,且不会造成不利影响。

The Lubuge Hydropower Station is small in its reservoir storage and high in its content of inflow sediment so that it is heavy in sediment deposit. In order to prolong the service life of reservoir and to make full use of economic benefit of the Station, it is needed to empty the reservoir for flushing sand once every three or five years. On July 13～17, 1997, the reservoir was emptied for flushing sand with the total sand-flushing amount of 8.5 million tons and the inflow sand amount of 3.5 million tons, so that it reached the goal of flushing sand basically. The calculation and analysis of the sand-flushing effectiveness showed that the effectiveness of flushing sand would be better and could not cause adverse impacts when the reservoir adopts the free-flow sand-flushing method.