Discharge area, groundwater

Next we look at how temperature gradients along an aquifer might affect the silica content of flowing groundwater. We consider a symmetrical aquifer that descends from a recharge area at the surface to a depth of about 2 km and then ascends to a discharge area. Temperature in the calculation varies linearly from 20 °C at the surface to 80 °C at the aquifer s maximum depth. 

George, R.J. Nulsen, R.A. Ferdowsian, R. and G.P. Raper (1999) Interactions between trees and groundwaters in recharge and discharge areas - A survey of Western Australian sites.- Agricultural Water Management 39, 91-113. 

The temperature, salinity and hydrochemical composition change systematically along the groundwater flow path from the recharge area where meteoric waters infiltrate, to the groundwater discharge areas (Section 2.3.1). 

Stephenson, M., Schwartz, W.J., Evenden, L.D. and Bird, G.A., 1992. Identification of deep groundwater discharge areas in Boggy Creek catchment, southeastern Manitoba, using excess helium. Can. J. Earth Sci., 29 2640-2652. 

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