北川县通口水电工程区岩溶发育特征探讨

Development of the karsts in the Tongkou hydropower station,Beichuan,Sichuan

研究区岩溶形态有溶沟、溶槽、溶斗、落水洞、溶蚀洼地以及大量的溶洞;影响岩溶发育主要因素有地层岩性、地质构造以及地貌。坝址区岩溶具有分带性特点;河床地带有利于岩溶的发育,坝址右岸和左岸岩溶发育存在差异。

Abundant karsts are developed in the construction site of the Tongkou hydropower station, Beichuan, morphologically including corroded gully, solution groove, corroded funnel, sinkhole, karst cave and corroded depression which are controlled by lithological, geological, structural and geomorphological features. These karsts display zonal distribution along the river valleys and faults. In Yudongzi gully, deep-seated karsts are also observed.