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Brian Morris, British Geological Survey, 2001.
Uploaded on Saturday 25 Feb 2012
Urban water supply and wastewater on a shallow aquifer
Delphine Digout, UNEP/GRID-Arendal
This graphic shows the changes in water supply and wastewater disposal that occur through four stages of growth of a settlement: early settlement; the town becomes a city; the city expands and the city expands further. The changes include increased groundwater pollution and changes in pluvial drainage, the water table and wellfields.