The most characteristic hydro-morphometric parameters controlling water flow in the Tshopo catchment have not yet been determined.Correlation analysis,multiple linear regression and hierarchical ascending classificati...The most characteristic hydro-morphometric parameters controlling water flow in the Tshopo catchment have not yet been determined.Correlation analysis,multiple linear regression and hierarchical ascending classification were applied to all the data in order to identify the most characteristic variables that significantly influence water flow velocity,and to group together physically similar sub-catchments.The results highlight the importance of topography on water flow.Three topographical variables,namely median altitude(H50),overall gradient(Dg)and specific gradient(Ds),have a significant influence(p-value≤0.05)on surface water flow velocity(Ve)in the Tshopo sub-catchments.Two opposing groups(G1 and G2)of sub-catchments were identified,on the one hand the sub-catchments belonging to the upper and middle course of the Tshopo(SBV1,SBV2,SBV3 and SBV5)and on the other the sub-catchments of the lower course(SBV6,SBV7 and SBV8).The first group is characterized by moderate relief(Ds ranging from 53.19 to 73.6 m),while the second group has low relief(Ds ranging from 18.1 to 29.43 m).展开更多
文摘The most characteristic hydro-morphometric parameters controlling water flow in the Tshopo catchment have not yet been determined.Correlation analysis,multiple linear regression and hierarchical ascending classification were applied to all the data in order to identify the most characteristic variables that significantly influence water flow velocity,and to group together physically similar sub-catchments.The results highlight the importance of topography on water flow.Three topographical variables,namely median altitude(H50),overall gradient(Dg)and specific gradient(Ds),have a significant influence(p-value≤0.05)on surface water flow velocity(Ve)in the Tshopo sub-catchments.Two opposing groups(G1 and G2)of sub-catchments were identified,on the one hand the sub-catchments belonging to the upper and middle course of the Tshopo(SBV1,SBV2,SBV3 and SBV5)and on the other the sub-catchments of the lower course(SBV6,SBV7 and SBV8).The first group is characterized by moderate relief(Ds ranging from 53.19 to 73.6 m),while the second group has low relief(Ds ranging from 18.1 to 29.43 m).
