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中文摘要：
针对枯期径流退水过程及地表形态特征对退水的调蓄作用,利用东江流域11个小流域枯期径流资料进行退水过程分析以及退水系数和水文地质参数的区域化研究。基于Boussinesq方程构建了Brutsaert和Lopez方法提出的快、慢速退水方程的解析解,计算出相应的退水系数,反演水文地质参数。通过对退水系数与流域地表形态特征的多元回归分析,确定影响退水系数的主要影响因子为河网密度、流域高差、流域面积和主干河流长度特征值,并建立与退水系数的多元非线性回归方程,以及水文地质参数T、给水度Sy以及含水层厚度D与流域特征的关系,为无（缺）资料流域的水文模拟提供基础。
英文摘要：
On the basis of low flow recession process and surface morphology characteristic effects on low flow recession, eleven catchments of Dongjiang Basin with daily observed flow discharges are selected to analyze low flow recession law and to study recession coefficient and hydrogeological parameter. Based on analytical solutions of fast and slow recession equations obtained by Boussinesq equation Brutsaert and Lopez metho＇d, the corresponding recession coefficient and the hydrogeological parameters is calculated. By multiple regression analysis on recession coefficient and basin surface morphology, the main factors affecting recession coefficient are drainage density, watershed elevation watershed area and trunk river length. Recession coefficient multivariate nonlinear regression and the relationship between hydrogeological parameter T, specific yield Sy, aquifer water level thickness D and the river basin characteristics is established. It could provide a basis for hydrological modeling for the drainage basin which is lack of hydrological data.
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