1. School of Geography, Earth and Environmental Science; University of Birmingham; Birmingham B15 2TT UK
2. Geography; College of Life and Environmental Sciences; University of Exeter; Exeter EX4 4RJ UK
3. Departments of Geology, Geography and Geographic Information Science; Mechanical Science and Engineering and Ven Te Chow Hydrosystems Laboratory; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
4. National Oceanography Centre Southampton; University of Southampton; Southampton SO14 3ZH UK
5. Department of Earth and Environmental Sciences; Vanderbilt University; Nashville TN 37240 USA
6. Centre for Environmental and Geographic Information Services; House 6, Road 23/C, Gulshan-1 Dhaka 1212 Bangladesh