1. Department of Surveying Engineering, Saghez Branch, Islamic Azad University, Saghez, Iran
2. Department of Watershed & Arid Zone Management, Gorgan University of Agricultural Sciences & Natural Resources, Gorgan, Iran
3. Rangeland Management, College of Natural Resources, University of Tehran, Tehran, Iran
4. Department of Watershed Management Engineering, College of Natural Resources, Tarbiat Modares University, Tehran, Iran
5. Faculty of Natural Resources Management, University of Tehran, Karaj, Iran
6. Department of Geography and Environmental Studies, Texas State University, San Marcos, TX, USA