中国岩溶2011，Vol.30Issue(1)：41-46,6.
喀斯特流域枯季径流衰减系数与地表形态特征相关分析研究
Correlation analysis between low-flow recession coefficient and surface landform characteristics in karst basin
摘要
Abstract
In light of the storage and adjustment for runoff by topography and landform features in dry season, daily observed flow data during dry seasons from 19 hydrology stations located up the Sinan station of the Wujiang River are analyzed to find out baseflow recession law.According to the characteristics of lowflow 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 · In(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.关键词
喀斯特流域/枯季径流/衰减系数Key words
karst basin/ low-flow/ recession coefficient分类
天文与地球科学引用本文复制引用
薛显武,陈喜,秦年秀,赵旭升,石朋..喀斯特流域枯季径流衰减系数与地表形态特征相关分析研究[J].中国岩溶,2011,30(1):41-46,6.基金项目
国家自然科学基金重点项目(40930635)、教育部科学技术研究重大项目(308012)、国家自然科技基金项目(50679025)及青年基金(41001011)资助 （40930635）
