Study on Variation of Hydrological Elements in Dawen River
The area above the Daicunba hydrological station,i.e.the middle and upper reaches of the Dawen river,was taken as the research object.Based on the precipitation in the basin and the daily runoff data of the Daicunba station,a variety of hydrological statistical methods were used to study the evolution characteristics of the hydrological elements of the Dawen river.The results showed that the rainfall and runoff of the Dawen river were on a downward trend as a whole.The principal component analysis(PCA)method was used to select 9 indicators from the 33 indicators of IHA as representative indicators for studying the hydrological variation law,which were used to evaluate the hydrological change degree of the Dawen river.The overall hydrological change degree differed from the hydrological change degree of the IHA indicator system by only 7.52%.The selected indicators can comprehensively and reasonably evaluate the changes in the hydrological situation of the Dawen river.
万方数据
维普
