Using the methods of data analyses,Variation of bank-full discharge and its response relationship with flow and sediment processes of Ningmeng reach was researched in Upperr Yellow River.The result show that,the variation trend of bank-full discharge of Ningmeng reach is to decrease in Upper Yellow River.From 3600-5800 m3/s in the mid-1960s to the current 1900-4000 m3/s.Compared with before 2000 and after 2000,there are obvious subregions of the point group of relationship between bank-full discharge of Sanhuhekou and flow and sediment processes of flood season.The evolution mechanism of Ningmeng reach changed in Upperr Yellow River after 2000,and follows different rules.According to the established relationship between bank-full discharge of Sanhuhekou and flow and sediment processes of flood season,the bank-full discharge increases(decreases)with the increase(decrease)of water quantity of flood season,it increases(decreases)with the decrease(increase)of the coming sediment coefficient of flood season,it increases(decreases)with the increase(decrease)of the flow process param-eter of flood season.
关键词
黄河上游/宁蒙河段/平滩流量/水沙过程/河床演变/响应关系
Key words
Upper Yellow River/Ningmeng reach/bank-full discharge/flow and sediment processes/channel evolution/response relationship
维普
万方数据