民勤青土湖重现碧波荡漾，水鸟飞翔场景（8月17日摄）。青土湖是石羊河下游甘肃民勤县境内离沙漠最近的湖泊，20世纪初仍有水域面积120平方公里，由于生态持续恶化，1959年青土湖完全干涸。2007年，投资47．49亿元的石羊河流域重点治理规划开始实施，通过关井压田、节水调结构等多种方式，青土湖地下水位有所上升，特别是2010年秋季以来，通过连续两年向石羊河下游下泄生态用水，青土湖出现季节性水域，最大时达10平方公里，湖区植被得到滋养，生态恶化趋势得到遏制，重现碧波荡漾，水鸟飞翔场景。新华社记者 王艳明 摄     Minqin blue ground lake reproduction ocean waves ripple，Water birds fly scene（August 17 perturbation）。Blue ground lake is the lower shiyanghe river in minqin county in gansu province territory from desert recent lakes，At the beginning of the 20th century there are still waters covers an area of 120 square kilometers，Due to the ecological continued to worsen，1959 young soil lake completely dry。In 2007,，Investment of 4.749 billion yuan of shiyang river basin, in the key management planning to implementation，Through the shut-in pressure field、Water-saving adjustable structure and so on many kinds of ways，Blue ground lake underground water level increased，Especially since the autumn of 2010，Through the continuous two years to the release of the shiyang river downstream ecological water，Blue ground lake appear seasonal waters，Maximum of 10 square kilometers，Lake vegetation are nourished，Ecological deterioration trend be contained，Reproduction ocean waves ripple，Water birds fly scene。Xinhua news agency reporters WangYanMing perturbation

在民勤青土湖水面上，两只野鸭在觅食（8月17日摄）。 In minqin blue ground on the lake，Two ducks on the feed（August 17 perturbation）。新华社记者 王艳明 摄 Xinhua news agency reporters WangYanMing perturbation

    在民勤青土湖边，当地农民吴成秀在介绍他看到的青土湖生态变化（8月17日摄）。     In minqin blue ground the lake，Local farmers in this WuChengXiu he saw blue ground lake ecological change（August 17 perturbation）。新华社记者 王艳明 摄 Xinhua news agency reporters WangYanMing perturbation