A baseflow is a portion of streamflow which comes from the sum of deep subsurface flow and delayed shallow subsurface flow.

A baseflow is a portion of streamflow which comes from the sum of deep subsurface flow and delayed shallow subsurface flow.

1) underground water is being withdrawn and used constantly by people for cooking, drinking etc.

2) in urban areas, where the land surfaces are concrete and tarmac (non porous and very low permeability), water will not be able to infiltrate through, thus causing the water flows in the soil layer to decrease. Percolation, throughflow and baseflow are all decreased due to lack of water. This will cause the water table deep down in the soil layer to decrease in height, leading the lesser water being stored underground.

Hope this answers your question!

G. A Payne has written:

'Application of a revised local government annual reporting system for estimation of non-point source reductions in agricultural watersheds' -- subject(s): Measurement, Nonpoint source pollution, Water quality management, Agricultural pollution

'Sources and transport of sediment, nutrients, and oxygen-demanding substances in the Minnesota River Basin, 1989-92' -- subject(s): River sediments, Sediment transport, Water quality

'Ground-water baseflow to the upper Mississippi River upstream of the Minneapolis-St. Paul area, Minnesota during July 1988' -- subject(s): Groundwater flow

'Sediment, nutrients, and oxygen-demanding substances in the Minnesota River' -- subject(s): Suspended sediments, River sediments, Carbon cycle (Biogeochemistry), Water quality