2月4日，大批船舶停靠在水位下降后的三峡大坝上游湖北省秭归县沙湾水域等待过闸。为保证枯水期长江中下游群众生产生活用水和航运的安全，从2012年11月底开始，三峡枢纽在发电的同时，持续为下游进行生态补水，水库水位也逐步下降，2013年2月3日晚首次跌破170米大关。至此，三峡水库已累计为下游生态补水约45亿立方米。新华社发（王辉富 摄）     February 4,,A large number of ship docked at water level decline after the three gorges dam in hubei province, cheung sha wan zigui county of yichang upstream water waiting for a brake.In order to ensure the production and life of the middle and lower Yangtze river water water and shipping safety,From 2012 to the end of November began,The three gorges project in power at the same time,Continue to ecological water downstream,The reservoir water level also step down,On February 3, 2013 for the first time late below 170 m mark.So far,The three gorges reservoir has been accumulated for downstream ecological water about 4.5 billion cubic meters.The xinhua news agency hair(WangHuiFu perturbation)

    上图：2012年11月18日，船舶停靠在水位涨至175米后的三峡大坝上游湖北省秭归县沙湾水域等待过闸。下图：2013年2月4日，船舶停靠在水位降至170米以下的三峡大坝上游湖北省秭归县沙湾水域等待过闸（拼版照片）。新华社发（王辉富 摄）     the:In November 2012 and day,Ship dock in water up to 175 m after the three gorges dam in hubei province, cheung sha wan zigui county of yichang upstream water waiting for a brake.the:On 4 February 2013,Ship docked at level down to 170 meters below the upper three gorges dam in hubei province zigui county of yichang shawan waters waiting for a brake(Makeup photos).The xinhua news agency hair(WangHuiFu perturbation)