Sediment Concentration to Water Discharge Ratio Along the 泥沙浓度沿水流量比.ppt

《Sediment Concentration to Water Discharge Ratio Along the 泥沙浓度沿水流量比.ppt》由会员分享，可在线阅读，更多相关《Sediment Concentration to Water Discharge Ratio Along the 泥沙浓度沿水流量比.ppt（16页珍藏版）》请在三一办公上搜索。

1、Sediment Concentration to Water Discharge Ratio Along the Mississippi(and Missouri)River,CE 397Statistics of Water ResourcesYao You,Key Points,Sediment concentration to water discharge ratio decreases downstream;Sediment concentration does not reach the limit of river capacity most of the time.,Sedi

2、ment Concentration Against Discharge,Anoka,MN,Flow velocity increases,correlation coefficient:0.6804,The Ratio Compared to Discharge,Anoka,MN,Flow velocity increases,The Ratio Compared to Discharge,St.Louis,MO,Flow velocity increases,Data Source,Very few sites have both consistent(suspended)sediment

3、 concentration and water discharge data;Qualified sites have uneven data points(3-20);Data comes from different time periods.,Treatment of Data,Few sites:nothing we can do right now.Small number of data points:rank sum+t testTime period issue:test for trend.,Results,downstream,Majority Trend:Upstrea

4、m Downstream,downstream,Exception:Upstream Downstream,downstream,St.Louis,MO,Sudden Increase of Sediment Concentration Near St.Louis,MO,St.Louis,Missouri River,major sediment supplier for MS,Mississippi River,Missouri River,Missouri River:Results,St.Louis,Upstream has much larger concentration to di

5、scharge ratio;,Missouri River:Results,St.Louis,Upstream has much larger concentration to discharge ratio;The ratio increases near Sioux,IA and Omaha,NE.,Conclusions,Sediment concentration to discharge ratio decreases downstream;Missouri River contributes a significant amount of sediment into the Mississippi River upstream of St.Louis,MO;Rivers are not at their full transport capacity most of the time.,Future Work,Understand the physics of the observed trends;Study more rivers to verify those findings.,