岩溶裂隙对坡面饱和水流汇集的影响研究  

Effect of Karst Fracture on Saturated Subsurface Flow Confluence

作　　者：薛显武[1] 陈喜[1] 张志才[1] 魏玲娜[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098

出　　处：《水电能源科学》2009年第6期20-23,82,共5页Water Resources and Power

基　　金：国家重点基础研究(973)基金资助项目(2006CB403200);教育部科学技术研究基金资助重大项目(308012);国家自然科技基金资助项目(50679025)

摘　　要：针对传统基于松散介质特性建立的分布式水文模型难以模拟喀斯特流域的水文过程,在分布式水文—土壤—植被模型(DHSVM)基础上引入裂隙渗流立方定律,考虑裂隙导水介质各向异性对坡面饱和水流汇集的影响,实现了对DHSVM的改进,以适用于喀斯特流域的水文过程模拟。结果表明,喀斯特裂隙对坡面饱和水流路径及汇集产生影响,对水流汇集的影响由流域上游至下游逐渐减弱,为进一步研究喀斯特流域的水文过程提供了科学依据和理论基础。The fractures are well developed in karst basin, therefore, the permeability of fracture has a significant effect on the flow concentration processes of saturated subsurface water. Traditional distributed hydrological models based on porous medium, can not simulate the hydrological process in karst basin. In this paper, a distributed hydrological-soil-vegetation model （DHSVM） developed by University of Washington was modified to simulate the runoff process in karst area in terms of the definition by Fracture Cubic Law and the effect of the fracture anisotropy of transmissivity to flow confluence of saturated subsurface water. The results show that karst fractures have significant impact on flow confluence is and runoff routing of saturated subsurface water, the impact on flow confluence is gradually weakened from upstream to downstream. This research provides a scientific basis and theoretical foundation to further study the process of karst hydrological basin.

关 键 词：喀斯特 分布式水文-土壤-植被模型 裂隙 坡面饱和水汇流 

分 类 号：P641.135[天文地球—地质矿产勘探] P339[天文地球—地质学]