What is meant by ozone layer depletion?
What is meant by ozone layer depletion?
Ozone layer depletion means the thinning of the ozone layer present in the upper atmosphere. That is harmful to nature and the atmosphere. Ozone layer depletion is one of the major problems for the atmosphere and also for all the living beings including the flora and fauna of this earth.
What is ozone layer for Class 5?
The ozone layer is a thin part of the Earth’s atmosphere that absorbs almost all of the sun’s harmful ultraviolet light. “Ozone holes” are popular names for areas of damage to the ozone layer. This is inaccurate. Ozone layer damage is more like a really thin patch than a hole.
What are the cause of depletion?
Resource depletion is most commonly used in reference to farming, fishing, mining, water usage, and consumption of fossil fuels. Major causes of resource depletion are: Population growth: With the increase in population the depletion of natural resources will also increase.
What is the meaning of depletion?
Depletion is an accrual accounting technique used to allocate the cost of extracting natural resources such as timber, minerals, and oil from the earth. Like depreciation and amortization, depletion is a non-cash expense that lowers the cost value of an asset incrementally through scheduled charges to income.
What suggestions increase water level?
Plant more trees of local varieties or restore the denuded patches of natural forest. Stop indiscriminate drawing out of ground water through bore wells. Build check dams across rivers to retain more water in the river bed after the rainy season. Encourage farmers to dig pits in the farms to hold rain water.
What are the major causes of ground water depletion in Indian cities?
Demand Side reason:
- Intensive ground water-based irrigation agriculture and excess withdrawal of groundwater due to unmetered pump or flat bill or subsidized rate of electrical.
- Due to MSP and other policies, the cultivation of water intense crops is growing.
- Overpopulation is causing more demand for water.
How can ground water depletion be reduced?
Ways to Protect and Conserve Groundwater
- Go Native. Use native plants in your landscape.
- Reduce Chemical Use.
- Manage Waste.
- Don’t Let It Run.
- Fix the Drip.
- Wash Smarter.
- Water Wisely.
- Reduce, Reuse, and Recycle.
Why is India’s water so abstracted?
Rising sea surface temperatures in the Indian Ocean may be linked to this decline, they found. This “has partially contributed to the decline in groundwater” due to lower recharge levels, he explained. And when monsoonal rainfall is lower, farmers rely more on groundwater, so extraction is higher, he stressed.
How can groundwater depletion be reduced?
Increasing supply of surface water and/or reducing demand of groundwater can reduce groundwater depletion to increase sustainability. Increasing water storage can help resolve the temporal disconnections between supply and demand.
What is the depletion rate of water?
Furthermore, the rate of groundwater depletion has increased markedly since about 1950, with maximum rates occurring during the most recent period (2000–2008) when the depletion rate averaged almost 25 km3 per year (compared to 9.2 km3 per year averaged over the 1900–2008 timeframe).
How do you increase underground water level?
Ground water level can be increased by ground water conservation and control use of water. Protect : trees, water sheds,lakes, ponds, deep drilling for water in coastal areas and water conservations.
What would happen if there was no groundwater?
Groundwater is the largest source of usable, fresh water in the world. When groundwater is overused, the lakes, streams, and rivers connected to groundwater can also have their supply diminished. Land Subsidence. Land subsidence occurs when there is a loss of support below ground.
What will happen if there is no groundwater?
For Earth as a planet, running out of water has some serious consequences. Environmental scientists predict that as well as sinking terrain over extraction of groundwater could also lead to an increased risk of earthquakes due to the fact that the Earth’s crust is becoming lighter.
How is groundwater affected by humans?
Some human activities, such as pumping water into the ground for oil and gas extraction, can cause an aquifer to hold too much ground water. Too much ground water discharge to streams can lead to erosion and alter the balance of aquatic plant and animal species.
How do humans affect streams?
Humans can also affect streams through agriculture, deforestation and construction by leaving large areas of soil uncovered and unprotected, leading to the formation of rills and gullies. Pollution is also a major affect humans have on streams and rivers.
Where is most groundwater located?
The maps that were developed from the study show that most modern groundwater is found in tropical and mountainous regions. Some of the largest reservoirs can be found in the Amazon basin, the Congo, Indonesia, the Rocky Mountain regions of North and Central America, and the Western Cordillera of South America.
Why is groundwater important to human life?
Groundwater supplies drinking water for 51% of the total U.S. population and 99% of the rural population. Groundwater helps grow our food. 64% of groundwater is used for irrigation to grow crops. Groundwater is an important component in many industrial processes.