EARTH SCIENCE
GROUNDWATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Precipitation causes the water table to rise.
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Precipitation causes the water table to lower.
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Precipitation has no effect on the water table.
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Precipitation keeps the water table at a constant level.
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Detailed explanation-1: -Fluctuations in the water table level are caused by changes in precipitation between seasons and years. During late winter and spring, when snow melts and precipitation is high, the water table rises. There is a lag, however, between when precipitation infiltrates the saturated zone and when the water table rises.
Detailed explanation-2: -When the water table rises and reaches ground level, water starts to seep through to the surface and flooding can happen. This means that water may rise up through floors or underground rooms such as cellars or basements.
Detailed explanation-3: -If there is more rainfall and more rainwater seeps into ground, the water table rises. And if excessive amount of groundwater is withdrawn for irrigation and industries, then the water table falls. The water found below the water table is called groundwater.
Detailed explanation-4: -The water table is the underground boundary between the soil surface and sedimentary rocks which are saturated with groundwater. The decline in the level of the water table is called depletion of the water table. Deforestation and overpumping of groundwater are the main causes of the depletion of the water table.