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Depletion of Water Table - Water : A Precious Resource - CBSE Class 7 Science Video Lecture
FAQs on Depletion of Water Table - Water : A Precious Resource - CBSE Class 7 Science Video Lecture
| 1. What is water depletion? |  |
Ans. Water depletion refers to the reduction in the amount of water available in the water table or underground aquifers. It occurs when the rate of water withdrawal exceeds the rate of replenishment, leading to a decline in the water table's level.
| 2. What is the water table? | |
Ans. The water table is the underground level below which the ground is saturated with water. It represents the upper boundary of the zone of saturation. The water table fluctuates depending on factors such as rainfall, surface water runoff, and groundwater extraction.
| 3. Why is water considered a precious resource? | |
Ans. Water is considered a precious resource because it is essential for various purposes, including drinking, agriculture, industry, and sanitation. It is a limited resource, and its availability is crucial for sustaining life and economic activities. With increasing population and water demand, the need to conserve and manage water resources becomes even more critical.
| 4. What are the causes of water table depletion? | |
Ans. Several factors contribute to water table depletion. Some of the main causes include excessive groundwater pumping for irrigation and industrial use, urbanization leading to increased surface runoff and reduced infiltration, deforestation, and climate change affecting rainfall patterns and recharge rates.
| 5. What are the consequences of water table depletion? | |
Ans. Water table depletion can have severe consequences, such as drying up of wells, reduced water availability for agriculture and domestic use, land subsidence or sinking, saltwater intrusion in coastal areas, and ecological imbalances. It can also lead to conflicts over water resources and impact the overall sustainability of ecosystems and human activities reliant on water.
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