Modelling the spatial variability in floodplain soil contamination during flood events to improve chemical mass balance estimates
✍ Scribed by M. D. Stewart; P. D. Bates; D. A. Price; T. P. Burt
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 745 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0885-6087
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✦ Synopsis
The spatial distribution of pollutants entering ¯oodplain soils during a ¯ood event will be controlled by the interactions between ¯ood hydraulics, ¯oodplain topography, pollutant concentration, soil conditions, suspended sediment size and chemical reactions between the pollutants, water and soil. These interactions produce spatial variations in pollution build-up that are dicult to sample using current ®eld-based techniques. Coupled hydraulic and hydrological models provide an ideal framework in which to explore these interactions and to improve current, reach-scale, chemical budget calculations. This paper presents a distributed model of ¯oodplain pollution transport which for the ®rst time allows a prediction of the spatial distribution of deposited and in®ltrated pollutants within river reaches over a range of scales (1±60 km). The model is shown to be able to predict many of the features of ¯oodplain pollutant build-up that are observed in the ®eld. Using data from hypothetical examples it is suggested that the model can be used in the development of site-speci®c ®eld sampling strategies.