Geography 327      Hydrology


recharge (input)
mostly percolation from the unsaturated zone, but also seepage from surface water bodies
discharge (output)
main source of water in rivers, and lakes; also diffusion into the capillary fringe

Groundwater flow: Darcy's law for saturated flow

Distribution of groundwater


a geologic unit with high porosity and permeability so that it stores and transmits water at a rate that is hydrologically significant

unconfined aquifer

confined aquifer

Patterns of groundwater flow

flow nets