Graphical User Interface for Rapid Set-up of SHETRAN Physically-Based River Catchment Model Stephen J Birkinshaw, Philip James, John Ewen School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK. Software availability Name of software: Graphical User Interface for SHETRAN Developed by: Stephen J Birkinshaw, Philip James and John Ewen Contact information: Dr. Steve Birkinshaw, School of Civil Engineering and Geosciences, Newcastle University, Newcastle, NE1 7RU, UK Tel: +44 191 222 8836 Email: s.j.birkinshaw@ncl.ac.uk Availability: Limited version (34 x 34 grid) available free at http://www.ceg.ncl.ac.uk/shetran Available since: April 2008 Learning materials at: http://www.ceg.ncl.ac.uk/shetran Software required: Windows operating system. HDF viewer (e.g. HDFView) Abstract The SHETRAN physically-based distributed rainfall-runoff modelling system gives detailed simulations in time and space of water flow and sediment and solute transport in river catchments. It is therefore a powerful tool for studying hydrological and environmental impacts associated with land-use and climate change. A Graphical User Interface (GUI) has been developed that allows a catchment data set to be set up quickly using a minimum of information. The GUI has an algorithm for the automatic generation of river channel networks from a DEM and has access to libraries of soil and vegetation parameters. 1. SHETRAN SHETRAN is a physically-based distributed model (PBDM) for water flow, sediment and solute transport in river catchments (Ewen et al. 2000) which includes hydrological components for simulating: rainfall interception by vegetation; evaporation and transpiration; snowpack formation and snowmelt; overland and channel flow; variably saturated subsurface flow; and river/aquifer interactions. It solves the governing, physics-based, partial differential equations for flow and transport on a rectangular finite difference grid. Examples applications include: Birkinshaw (2008) for water flow; Birkinshaw and Bathurst (2006) for sediment transport; and Birkinshaw and Ewen (2000)