[1]School of Geographical Sciences, Southwest University, Chongqing Key Laboratory of Karst Environment, Key Laboratory of Eco-environments in Three Gorges Reservoir, Ministry of Education, Chongqing 400715, China;
[2]Field Scientific Observation & Research Base ofKarst Eco-environments at Nanchuan in Chongqing, Ministry of Land and Resources, Chongqing 408435, China;
[1]School of Geographical Sciences, Southwest University, Chongqing Key Laboratory of Karst Environment, Key Laboratory of Eco-environments in Three Gorges Reservoir, Ministry of Education, Chongqing 400715, China;
[2]Field Scientific Observation & Research Base ofKarst Eco-environments at Nanchuan in Chongqing, Ministry of Land and Resources, Chongqing 408435, China;
[1]School of Geographical Sciences, Southwest University, Chongqing Key Laboratory of Karst Environment, Key Laboratory of Eco-environments in Three Gorges Reservoir, Ministry of Education, Chongqing 400715, China;
[2]Field Scientific Observation & Research Base ofKarst Eco-environments at Nanchuan in Chongqing, Ministry of Land and Resources, Chongqing 408435, China;
[3]Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
[1]School of Geographical Sciences, Southwest University, Chongqing Key Laboratory of Karst Environment, Key Laboratory of Eco-environments in Three Gorges Reservoir, Ministry of Education, Chongqing 400715, China;
[2]Field Scientific Observation & Research Base ofKarst Eco-environments at Nanchuan in Chongqing, Ministry of Land and Resources, Chongqing 408435, China;