叶尔羌河中下游河流泥沙变化规律分析

The Changing Formulation of the Sediment Load in the Mid-downstream of the Yarkand River

应用水文站的泥沙资料,分析叶尔羌河中下游河流悬移质输沙量的地区、年内、年际和沿程变化规律,并对形成这些变化规律及变化趋势的影响因素进行了探讨。流域下垫面植被条件差,洪水类型多及水利工程的调节作用是造成河流泥沙变化大的主要原因,对未来河流输沙量的预测应依据其变化趋势,并结合水利工程规划施实情况来分析,而不能单凭常规的统计方法。

Based on the sediment data of the hydrological station , the changing formulation of the an-nual , the inter annual , the regional and the along way of the sus -pended load sediment in mid -downstream of the Yarkand river were analyzed , and the reasons for the changing formulation and the changing trends were discussed.The poor land use , more flood types and the effects controlled by the hydraulic engineering were the main cause that induced to the big change of the sediment load.The forecasting of the future sediment load should be based on the changing trends , and combined with the plan of the hydraulic engineering , it may not be only depended by the normal statistic meth-ods.