Modelling the Stratigraphy, Geoarchaeology, and Aggregate Resources of English Valley Systems: Application of a Process-Based Landscape Evolution Model

This proposal sets out the justification, scope and terms of reference for conducting a 16-month pilot study of (1) the dynamics of geomorphic change in English lowland alluvial systems, focusing on the Upper Thames Valley, and (2) the implication of such change for paleoenvironmental reconstruction, preservation and visibility of the archaeological record, and for aggregates exploration. The project will involve using a process-based model of landscape evolution to develop and visualize a set of alternative scenarios for the Holocene evolution of the Upper Thames Valley. The project will have three linked components: a scientific component, an outreach component, and an applied component. The primary objectives of the scientific component are (a) to explain the origins of observed geomorphic change (e.g., episodic alluviation in valley systems) and in particular explore potential impacts of hillslope land-clearance on alluviation and flood frequency in valleys, and (b) to examine the implications of such change for erosion, burial, and visibility of archaeological remains. The outreach component is designed to take advantage of the modeling technology to communicate the dynamics of alluvial geomorphology by producing an animated sequence showing erosion, alluviation, and river channel change over time. The applied component will consist of a model-based analysis of controls on burial depth of aggregates. In this proposal, we also outline potential follow-on activities that could be incorporated into a Project Phase 2 beginning in April, 2004. These include application of the model to other valley systems, enhanced outreach and communication, and an extension of the applied component.