程海湖补水可行性研究

Water Replenishment Feasibility in Chenghaihu Lake

程海湖是云南省九大高原湖泊之一,近年来一直处于轻度富营养状态,且蓄水量下降趋势明显,年亏水量近1700万m^3。外流域补水是唯一可以解决程海湖水资源矛盾的办法。补水水源水质类别必须要达到Ⅲ类以上,水量要在满足自身流域用水要求外至少能保证每年向程海补水1700万m^3。程海湖周边水源有仙人河、五郎河和金沙江,可行性分析后认为五郎河引水比较可行。

Chenghaihu Lake, as one of the nine plateau lakes in Yunnan province, is an enclosed alkaline lake. Its pH and fluoride background values are higher than other fresh water lakes. Due to the rapid water demand in the basin, water resource shortage has become more and more serious. The water lost 1, 700, 000 cubic meters every year. Meanwhile, the water quality of the lake has been becoming worse in recent year. Replenishing water from other watersheds seemed to be the only way to alleviate the water shortage problem of Chenghaihu Lake. The replenishment water quality needs to be above the third class of national water standard in order to ensure the good water quality state of the lake. There are several rivers nearby Chenghaihu Lake, namely Xianren River, Wulang River and Jinshajiang River. The water sources could replenish 1, 700, 000 cubic meters of water to the lake every year and leave itself enough water. After comparing the water volume of each potential water sources, Wulang River might meet all requirements.