Modelling long-term contaminant migration in a catchment at ®ne spatial and temporal scales using the UP system
نویسندگان
چکیده
Amethod has been developed to simulate the long-term migration of radionuclides in the near-surface of a river catchment, following their release from a deep underground repository for radioactive waste. Previous (30-year) simulations, conducted using the SHETRAN physically based modelling system, showed that long-term (many decades) simulations are required to allow the system to reach steady state. Physically based, distributed models, such as SHETRAN, tend to be too computationally expensive for this task. Traditional lumped catchment-scale models, on the other hand, do not give suciently detailed spatially distributed results. An intermediate approach to modelling has therefore been developed which allows ̄ow and transport processes to be simulated with the spatial resolution normally associated with distributed models, whilst being computa-
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