1. School of Soil and Water Conservation Beijing Forestry University Beijing China
2. Jixian National Forest Ecosystem Observation and Research Station, CNERN, School of Soil and Water Conservation Beijing Forestry University Beijing China
3. College of Hydrology and Water Resources Hohai University Nanjing China
4. DASCO Inc. Centennial Colorado USA
5. Departamento de Análisis Geográfico Regional y Geografía Física, Facultad de Filosofía y Letras, Campus Universitario de Cartuja University of Granada Granada Spain