Recharge aquifer parameter

Modeling of the transport of the long-lived nuclides, especially U, require knowledge of the input at the water table as a boundary condition for aquifer profiles. There are few studies of the characteristics of radionuclides in vadose zone waters or at the water table. Significant inputs are likely to occur to the aquifer due to elevated rates of weathering in soils, and this is likely to be dependent upon climatic parameters and has varied with time. Soils may also be a source of colloids and so provide an important control on colloidal transport near recharge regions. 

RCHRG DP Deep aquifer percolation fraction. It represents the fraction of percolation from the root zone which recharges the deep aquifer. This parameter may vary between 0 and 1. 

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