Modelling the spatial variation in soil moisture at the landscape scale: an application to five areas of ecological interest in the UK
✍ Scribed by P. S. Naden; E. M. Blyth; P. Broadhurst; C. D. Watts; I. R. Wright
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 688 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0885-6087
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✦ Synopsis
A simple conceptual hydrological model that explicitly includes the lateral movement of soil water and operates eciently at the landscape scale is outlined. It is applied to ®ve areas of ecological interest in the UK to provide distributed mean monthly soil moisture on a 50 m grid. As the model's driving variables Ð daily rainfall and potential evapotranspiration Ð are assumed constant over each of the tracts of land, the variability in soil moisture is due to dierent soil types and to topographic eects. Box plots of the mean monthly simulated soil moisture clearly show the spread of values occasioned by modelling the lateral water movement down the hillslope. The general magnitude of the results are compared with published data wherever possible and there is some discussion of the form of the curve used in the model to describe the attenuation of evapotranspiration with decreasing soil moisture.