Abstract
The use of physically-based spatially-distributed models to solve problems in hydrology has been limited by their intensive data and setup time requirements. We have therefore created a system that enables the automatic setup of a robust, physically-based spatially-distributed SHETRAN model for any catchment, gauged or ungauged, in Great Britain. National-scale datasets for topography, soil, landuse, geology and climate have been collated, processed and stored to allow rapid retrieval and configuration of catchment models with minimal user-intervention. These maps can be easily replaced by national datasets of other countries or global datasets, ensuring the system's international transferability. A graphical user interface has been developed to facilitate the model setup process. The resultant system, SHETRAN-GB, has the potential to significantly aid the deployment of SHETRAN for addressing important issues relating to water resources, hydrological extremes and climate change, either for individual or multiple catchments.
Highlights
Robust numerical models are an essential tool for research in hydrological processes and for informing flood and water management around the world
The foundations of Système Hydrologique Europeén (SHE) were strongly influenced by Freeze and Harlan (1969) who proposed a blueprint for a physically-based hydrological model, with these principles taken further and additional processes incorporated during the development of SHETRAN
This paper has detailed the datasets, processing and software development involved in setting up a national SHETRAN modelling system for Great Britain
Summary
Robust numerical models are an essential tool for research in hydrological processes and for informing flood and water management around the world. Physically-based models are potentially useful for investigating a number of prominent hydrological problems, such as predictions under non-stationary land use or climate, it is logical to take advantage of recent advances in computing power and data availability to facilitate their wider use. This study has the purpose of creating, for the first time, a physically-based hydrological modelling system for Great Britain using the SHETRAN model (Abbott et al, 1986; Ewen et al, 2000) and national datasets that are freely available for academic research. This paper attempts to help address this issue by providing an interface to set up the SHETRAN model for any catchment in GB with national and international datasets prepared and transformed for physically-based hydrological modelling (SHETRANGB).
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