University of Calabria, Soil Conservation Department, Rende, CS 87036 Italy
University of Arizona, Department of Hydrology and Water Resources, John Harshbarger Building 1133 E. North Campus Drive, Tucson, AZ 85750 United States
Shanxi University, School of Environment and Resources, Taiyuan, SHX 030006 China
University of Calabria, Soil Conservation Department, Rende, CS 87036 Italy