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表层岩溶带是喀斯特地区水分重要的赋存与运移空间,是该地区水文过程的重要控制因素,其发育受气候、岩性、地貌等多种因素影响。选取贵州普定县陈旗流域典型山体为研究对象,采用山坡剖面曲率描述山坡地形,利用探地雷达现场勘测表层岩溶带发育厚度,在此基础上分析了表层岩溶带发育特征及其受地形因素的影响。结果表明,喀斯特山体地形低凹处具有较好的水动力条件与较强的溶蚀潜力,促进了表层岩溶带的发育;山坡表层岩溶带发育厚度与剖面曲率呈反比关系,凹形山坡对应的表层岩溶带发育厚度大于凸形山坡;坡间连接带低洼处表层岩溶带厚度大于相同高度的山坡表层岩溶带发育厚度。
Epikarst karst zone is an important water storage and migration space in Karst area. It is an important controlling factor of hydrological process in this area. Its development is affected by many factors such as climate, lithology and geomorphology. In this paper, the typical mountain body of Chenqi catchment in Puding County, Guizhou Province is selected as the research object. The curvature of hillside section is used to describe the hillside topography. The ground surface karst zone thickness is investigated by GPR. Based on the analysis, the development characteristics of top karst zone and its topographic factors Impact. The results show that the karst terrain has good hydrodynamic conditions and strong erosion potential in the low relief area, which promotes the development of epikarst zone. The thickness of the epikarst zone is inversely proportional to the profile curvature, and the corresponding surface of the concave slope The thickness of karst zone is larger than that of convex hill; the thickness of epikarst zone is higher than that of the same height in the low slope of the connecting belt.