Answer: The principal reason for the increase of groundwater use is the increasing population. Urbanization and pollution have both contributed to an increase in the use of groundwater. Polluted rivers lakes and springs are no longer viable sources of groundwater. Urbanization has concentrated large populations in areas that might not have direct access to surface water or that might have a larger demand for freshwater than surface water can supply.
Why has groundwater use increased over time?

Direct effects. An irrigation scheme draws water from groundwater rivers lakes or overland flow and distributes it over an area. Hydrological or direct effects of doing this include reduction in downstream river flow increased evaporation in the irrigated area increased level in the water table as groundwater recharge in the area is increased and flow increased in the irrigated area.

Groundwater is the main source of drinking water in many coastal areas of the United States and extraction has increased over time . Under baseline conditions the inland extent of saltwater is limited by higher pressure exerted by the freshwater column owing to its higher elevation.

Sat Nov 15 2014 13:30:00 GMT-0500 (Eastern Standard Time) · Groundwater pollution (also called groundwater contamination) occurs when pollutants are released to the ground and make their way down into groundwater.This type of water pollution can also occur naturally due to the presence of a minor and unwanted constituent contaminant or impurity in the groundwater in which case it is more likely referred to as contamination rather than pollution.

Groundwater is a key water supplier for several users in the arid region or in some cities where groundwater is most of the time the sole water resource available. About 71% of the groundwater is used for agriculture 20% for water urban supply and 3% for domestic and animal use .

Over -extraction of groundwater and falling water tables are big problems in China particularly in the north. According to the Ministry of Construction preliminary statistics show that there are more than 160 areas nationwide where groundwater has been over -exploited with an average annu...

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