龙羊峡水库泥沙淤积量估算

Estimation of the Sedimentation in Longyangxia Reservoir

黄河上游唐乃亥站和贵德站是龙羊峡水库入库和出库水文站 ,在水库蓄水前已有 30年同步水沙量观测资料 ,同时二站径流量、输沙量有较好的相关关系。根据蓄水后唐乃亥站年输沙量 ,利用出入库站在水库蓄水前建立输沙量关系 ,推求贵德站逐年未受水库蓄水影响输沙量 ,与贵德站相应逐年实测输沙量差值累积量来估算水库淤积量。经计算 ,1986年 10月水库蓄水至 1999年 12月水库淤积沙量 2 .98× 10 8t,折合体积 2 48×10 8m3 。

Tangnaihai and Guide are the two hydrologic stations to control the incoming flow and out flow of Longyangxia reservoir.There are 30\|year gauge\|station records before the construction of the reservoir.Through the correlation analysis of the two stations,the coresponding estimated sediment discharge at Guide station without considering the existence of the reservoir can be obtained.Therefore,the sedimentatim in Longyangxia reservoir can be estimated by the diffenence of the measured data at Guide station and the estimated values without the reservoir construction.