EGU General Assembly 2008
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  Information - GM1.5 Reduced Complexity Modelling in Geomorphology

Event Information
Recent years have seen the development of ‘reduced-complexity models’ in geomorphology. These models use relatively simple rules, based on abstractions of the (often complex) governing physics to simulate, for example, geomorphic phenomena ranging from braided rivers, sand dune formation and estuarine landforms.

This emphasis on simplicity has made it possible for reduced-complexity models to tackle two issues that are beyond the scope of more traditional approaches: First, they provide a framework for identifying processes that are fundamental to complex geomorphological phenomena. Second, due to their computational efficiency, they have the potential to simulate geomorphic behaviour at large scale over historic and Holocene timeframes.

Another dividend of this more parsimonious approach is that different groups of processes can easily be combined - allowing sub models from other disciplines to be embedded. Notably, in Aeolian geomorphology, a series of numerical models are investigation controls on dune formation, including the effects of including simple vegetation growth models on dune morphology. Similarly in fluvial geomorphology these reduced complexity models have allowed the effects of vegetation on channel plan form and sediment transport to be explored. Excitingly these approaches also allow the integration of human activity on geomorphology through agent based modelling approaches.

This session builds upon a highly successful EGU session on ‘Reduced complexity modelling’ in 2005. Here, we hope to look at progress made since 2005 and focus on how reduced complexity models may be a framework upon which models from a range of disciplines can be combined.

We encourage submissions from all fields of geomorphology, Fluvial, Aeolian, Coastal, Estuarine. In particular those studies that combine processes, e.g. fluvial/Aeolian and vegetation, the effects on landform development of wind vs water, or ice vs water. We also welcome reduced complexity modelling papers in novel areas, those making new technical developments as well as focusing on verification and validation methods.

Preliminary List of Solicited Speakers

This session is supported by the British Society for Geomorphology (BSG) Reduced Complexity Modelling working group.

General Statement
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