乌江河谷岩溶发育特征研究

Some Characteristics of Karst Development in Wu River

乌江是长江上游的一条支流,水力资源丰富,全流域碳酸盐岩分布面积占70%,岩溶发育是影响坝址工程地质条件的重要因素.乌江是一深切峡谷,具特定的岩溶发育特征,如河谷深部洞穴发育;河谷类型对岩溶发育有所制约等.本文通过河谷深部洞穴成因的研究,提出了它可能的分布部位;对中更新世以来古气候古环境的研究,提出主要岩溶发育期和古水文网在河谷岩溶发育中的作用.并探讨库坝勘测中第四纪地质、古水文网调查的重要性.

The Wu River, with a tatal length of 1012km, is one of the main tributaries of the Yangtze River. The difference between the elevations of the source and the outlet is 1810m, thus resulting in plenty of hydraulic power. About 70% of the whole areaa is covered by the karst terrain. Although the valley of the Wu River is cut deeply, and the area is thought of being a mountainous area with rapid rising, yet some caves in some depths beneath the valley could still be discovered. During the period of Quaternary, the climate of the area under study exerted a deep influrnce on the karat development of the Wu River.