三门峡水库进出库水沙过程变化趋势及变异点分析

采用时间序列分析方法对三门峡水库天然情况下及建库后进出库水沙过程进行了变化趋势以及变异点分析,结果表明天然情况下水沙序列基本处于无趋势状态;而三门峡水库运行后进出库水沙序列大多出现了较明显的下降趋势,并且趋势在未来仍将延续;三门峡水库的运行对流量序列的影响相对较小,对年内径流调节有一定影响,对入库含沙量的调整较大。

Analysis on change trend and aberrance point of runoff-sediment process of inflow and outflow of Sanmenxia Reservoir

Based on time series analysis,the change trend and aberrance point of runoff-sediment process of inflow and outflow of Sanmenxia Reservoir after the completion of the reservoir and under the natural condition are analyzed herein.The results show that the runoff-sediment series are basically under a trend of no change under the natural condition,and moreover,more obvious downward trends appear in most of the runoff-sediment series of the reservoir inflow and outflow after the impoundment of the reservoir and then the trends are to continue in the future.The operation of Sanmenxia Reservoir has less impact on the runoff series and has a certain impact on the annual runoff regulation,but has a large impact on the regulation of the inflow sediment.