What are the problems of groundwater?

Depletion of water tables, saltwater encroachment, drying of aquifers, groundwater pollution, water logging and salinity, etc. are major consequences of overexploitation and intensive irrigation. It has been reported that in many parts of the country the water table is declining at the rate of 1–2 m/year.

What is a disadvantage of groundwater use?

The advantages of withdrawing groundwater include water for drinking and irrigation; availability and locality; low cost, no evaporation losses; and it is renewable. Disadvantages include aquifer depletion from over pumping, subsidence, pollution, saltwater intrusion, and reduced water flow.

What are the negative effects of groundwater depletion?

Some of the negative effects of ground-water depletion include increased pumping costs, deterioration of water quality, reduction of water in streams and lakes, or land subsidence. Such effects, while variable, happen to some degree with any ground-water use.

What are some disadvantages and advantages of groundwater?

Advantages and disadvantages of groundwater supply

• Rocks act as a natural filter.
• No loss of water through evaporation.
• No requirement for expensive and environmentally damaging dams.
• Pumping costs low.

What is the main problem associated with groundwater in India Mcq?

Excessive pumping can lower the groundwater table, and cause wells to no longer be able to reach groundwater. As the water table lowers, the water must be pumped farther to reach the surface, using more energy. In extreme cases, using such a well can be cost prohibitive.

Why is groundwater under serious threat in India?

The ground water is the huge source of disposable, fresh water on the planet. As the ground water level decreases, the cost of pumping the water to the surface increases rapidly. Agricultural requires a huge amount of ground water, which indeed results in the depletion of the ground water level.

How is water being overused or misused?

Used irrigation water is often contaminated with salts, pesticides and herbicides. Industry and urban centres also return contaminated water to both surface and underground water resources. Dried-up rivers are a good example of the overuse of freshwater resources. Overuse in one place means deprivation in another.

How groundwater can affect the construction process?

Groundwater is found beneath the Earth’s surface in soil pore spaces and rock formation fractures. Whenever construction must take place below the water table or soil is used to retain water, groundwater affects the project by impacting the function and design of the facility, and the cost of its construction.