What is a possible long term consequences of groundwater overdraft?

What is a possible long term consequences of groundwater overdraft?

Direct impacts of groundwater overdraft include reduced water supply due to aquifer depletion or groundwater contamination, increased groundwater pumping costs, and the costs of well replacement or deepening.

What are the consequences of overdrawing ground water?

Impacts on the environment

• Land subsidence – the collapse of land from lack of support (from the water that is being depleted).
• Lowering of the water table, which makes water harder to reach streams and rivers.

Is groundwater overdraft bad?

Over and above the loss of water resources, groundwater overdraft can harm surface water rights; diminish river flows; impact fish, animal, and plant communities that depend on groundwater; increase energy costs from pumping; and result in economic impacts on agriculture that depends on groundwater.

What is overdraft in groundwater?

Overdraft occurs when, over a period of years, more water is pumped from a groundwater basin than is replaced from all sources – such as rainfall, irrigation water, streams fed by mountain runoff and intentional recharge.

Why does groundwater overdraft occur?

Groundwater overdraft occurs when the groundwater resources are used up more quickly than they are replenished. Groundwater overdraft can occur for a period of time without noticeable consequences, but eventually the aquifer will not be able to keep up with the rate of use as its water storage is depleted.

Which of the following is a consequence of water polluted by human sewage?

Health Effects Life-threatening human pathogens carried by sewage include cholera, typhoid and dysentery. Other diseases resulting from sewage contamination of water include schistosomiasis, hepatitis A, intestinal nematode infections, and numerous others.

What are the negative effects of groundwater depletion?

Some of the negative effects of groundwater depletion:

• drying up of wells.
• reduction of water in streams and lakes.
• deterioration of water quality.
• increased pumping costs.
• land subsidence.

Why is groundwater bad?

Groundwater is vulnerable to contamination from a range of activities, such as industrial and agricultural enterprises and changes in land-use. Poor management of groundwater can cause many significant water quality problems, such as rendering water unfit for human or animal consumption.

What are several unintended consequences of overpumping of groundwater?

Decades of groundwater pumping have caused the land to sink, a phenomenon known as subsidence. Sometimes, when the land sinks, or compacts, it becomes irreversibly denser, and can’t hold water like it did previously. The result can increase surface flooding and permanently reduce aquifer capacity.

What are the causes and consequences of water pollution?

It causes illnesses: consuming contaminated water can lead to serious health problems. From diarrhoea, cholera, hepatitis A, typhoid, to death. It is estimated that about 5 million people die each year from drinking this water.

Which is a possible long-term consequence of groundwater overdraft?

The correct answer is B. Unproductive wells. The possible long-term consequences of groundwater overdraft is the unproductive wells. Groundwater overdraft is known to occur when the ground water which is used exceeds the amount which is in the aquifer.

What happens when water is removed from an aquifer?

When large volumes of water are removed from a groundwater basin, compaction of the aquifers can occur as clay layers are drained, causing land subsidence – an actual drop in the land’s elevation. Most subsidence is inelastic, meaning that the land surface will not rebound even if previous groundwater levels are restored.

Are there any cities that are dependent on groundwater?

For example, the cities of Davis and Woodland, formerly 100% dependent on groundwater, are diversifying their water supply portfolio to include some surface water because salt accumulation in groundwater as well as disposal of salt-laden wastewaters after human use is becoming a problem.

How is groundwater extraction affecting the San Joaquin Valley?

In the San Joaquin Valley, subsidence from groundwater extraction has greatly impacted infrastructure such as the San Joaquin River, Delta Mendota Canal, Friant-Kern Canal and San Luis Canal, as well as private canals, bridges, pipelines, and storm sewers. Technological advances have made monitoring of land subsidence more accurate.