1. Department of Environmental EngineeringDemocritus University of Thrace Vas. Sofias 12 Xanthi GR67100 Greece
2. Subdivision Soil, Water and Land UseAlterra, Wageningen UR PO Box 47 6700AA Wageningen The Netherlands
3. Department of Civil EngineeringDemocritus University of Thrace Vas. Sofias 12 Xanthi GR67100 Greece
4. Geography DepartmentSwansea University Singleton Park Swansea SA2 8PP UK
5. Department of Environmental Sciences, Division of Soil Physics and Land ManagementWageningen University PO Box 47 6700AA Wageningen The Netherlands