1. Institute of Karst Geology Chinese Academy of Geological Sciences Guilin PR China
2. Karst Dynamics Laboratory Ministry of Natural Resources Guilin PR China
3. School of Soil and Water Conservation Beijing Forestry University Beijing PR China
4. Departamento de Análisis Geográfico Regional y Geografía Física, Facultad de Filosofía y Letras Campus Universitario de Cartuja, Universidad de Granada Granada Spain
5. Department of Geography University of Málaga Málaga Spain