• 责任者：Xue Xianwu (State Key Lab. of Hydrology-Water Resources and Hydraulic Engineering ; Hohai University ; Nanjing 210098 ; China) ; Chen Xi
• 刊名：Carsologica Sinica
• 出版年：2011
• 卷期：30(1)
• 关键词：岩溶环境 ; karst environment ; 地表水 ; surface water ; 乌江 ; Wujiang River
• 页码：p.41-46
• 图表：2 illus., 3 tables, 16 refs.
• 分类号：1701
• issnNo：ISSN1001-4810
• isbnNo：CN45-1157/P

According to the characteristics of low-flow recession curve, the baseflow is divided into two parts, fast fissure flow and slow fissure flow, and the corresponding recession coefficient is calculated. Based on the single factor and multi-factor regression analysis between the recession coefficient and the basin’s landform features, elevation eigenvalue and topographic index eigenvalue are determined as the main factors affecting the recession coefficient. The dual non-linear regression equations are established with these two eigenvalues and the recession coefficient (a1=0.781-0.266·ln(x)+0.633·ln (y) and a2=0.061-0.016·ln(x)+0.044·ln(y)), their confidence intervals are greater than 99%, so these two curves fit significantly and these equations can be used to regionalize the recession coefficients and to provide the basis for hydrological simulation in ungauged basins.