水洞沟水库泥沙淤积测算及运行方案研究

Study on Sediment Deposition Measurement and Computation of Shuidonggou Reservoir and Operational Schemes

水洞沟水库是宁蒙交界处的一座工业供水水库,从黄河青铜峡-石嘴山河段用抽水泵站通过压力管道引水.利用2011 年10 月至2013 年11 月水库泥沙淤积实测资料,将水库运行阶段分为2011-2014 年、2015-2019 年、2020-2029 年,计算了4 种运行方案下的淤积量和平均淤积厚度.结果表明：①水库应尽可能避免在结冰期和含沙量较大的时期进水;②尽可能采用间歇式集中进水的方式;③2011-2014 年水库宜采用低水位运行,2015-2019 年、2020-2029 年宜采用高水位运行;④2015-2019 年、2020-2029 年宜采用的水库运行方案为每月间歇进水2 ～3 次,其中3 月比实际用水量多进水300 万m^3 ,4-6 月每月均比实际用水量多进水100 万m^3 ,其他月份进水量与用水量相等.

Shuidonggou Reservoir is an industrial water supply reservoir located at the junction of Ningxia and Inner Mongolia of China.Water is diverted to the reservoir through pressure pipeline from the pumping station of the Yellow River from Qingtongxia to Shizuishan. The operational time of the reservoir is divided into three stages,i. e. 2011-2014,2015-2019 and 2020-2029 based on the field measurement data from 2011,and the deposited volume and averaged thickness are calculated under four running schemes. The following conclusions can be obtained: 1) The reservoir should avoid water injection during ice formation period or flood period as far as possible; 2) It should adopt the intermittent and concentrated water injection scheme as far as possible; 3) It is suggested to run the reservoir at lower water level from 2011 to 2014,and to run it at higher water level from 2015 to 2019 and from 2020 to 2029; 3) It is suitable to inject water into the reservoir 2 or3 times intermittently each month. It is suggested to inject extra 3 million m3 water more than actual water requirement in March,while from April to June,it is suggested to injection extra 1 million m3 water more than actual water requirement each month,the water injection amount and water requirement amount should be the same in other months.