摘要
通过对猫跳河和六冲河流域上喀斯特峡谷的研究，发现其分布和形态类型同水力梯度有密切的对应关系。选取能描述喀斯特峡谷形态类型的高宽比作为参量，对其水力梯度进行定量分析，从实践上证明了喀斯特峡谷与水力梯度的关系。然后从水文地貌的角度出发，论证了喀斯特峡谷的形成是适应水流以大水力比降和高效转化能量的结果；水流以最佳通道运行导致了喀斯特峡谷具有地表地下双重结构，水力比降的大小影响河流的下切侵蚀力。
Through researching karst canyon on Maotiao and Liuchong River drainage basins,it is discovered that the distribution and shape types of karst canyon have a close connection with hydraulic gradient.Through a quantitative analysis for hydraulic gradient with H/L (the ratio of height to wideness)as a parameter which can describe the shape type of karst canyon,the relationship between karst canyon and hydraulic gradient is proved to be in existence.From the standpoint of hydrogeomorphology,it is demonstrated that karst canyon is a result of water energy transformation at high hydraulic gradient;water running in the best passage is responsible for the two layer structure of karst canyon at surface and underground the value of hydraulic gradient influences the capacity of erosion and high hydraulic gradient is beneficial to the formation of karst canyon.
出处
《中国岩溶》
CAS
CSCD
北大核心
1996年第4期382-389,共8页
Carsologica Sinica
