1. a Soil Conservation and Watershed Management Department, Khorasan Razavi Agricultural and Natural Resources Research Centre, Agricultural Research, Education and Extension Organization (AREEO), Mashhad, Iran
2. b Soil Conservation and Watershed Management Department, Khorasan Agricultural and Natural Resources Research Centre, Agricultural Research, Education and Extension Organization (AREEO), Birjand, Iran
3. c Watershed Management Department, Soil Conservation and Watershed Management Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
4. d Faculty of Natural Resources, Department of Forest Policy and Economics, University of Tehran, Tehran, Iran