Learn English Grammar From A–Z
- Because of the long residence times typical of most bodies of groundwater, contaminated aquifers are not readily restored by natural processes.
- Groundwater is found at varying depths underneath the earth's surface, in permeable rocks known as aquifers which are saturated by the infiltration of rainfall.
- The movement of saline water into freshwater aquifers, or saltwater intrusion, is usually caused by ground water pumping from coastal wells.
- Percolation pits dug along the lengths of the bunds would facilitate recharge of groundwater aquifers.
- The earth could not absorb the rainwater; as a result groundwater aquifers could not recharge.
- These saline waters get pulled into local aquifers as wells and groundwater supplies are overdrawn.
- Groundwater comes from an aquifer, an underground zone of saturated sand, gravel, or rock that yields significant quantities of water.
- Chalk rivers are fed from groundwater aquifers, which produce clear waters and a generally stable flow and temperature regime.
- Likewise, most of the water supply for the town of Sonoyta, as well as the nearby border town of Lukeville, comes from the groundwater aquifer.
- The groundwater moved through the aquifer which was close to the Carrigower River, a designated Special Area of Conservation.
- Therefore, the results of a wet base or a dry base are the same if the upper part of the aquifer is frozen: it is not possible to transmit water from the glacier into the rock mass.
- Today water-resource managers must increasingly consider how withdrawals affect the amount of water flowing in and out of aquifers.
- Urbanization in turn leads to further adverse environmental effects, such as contamination of soils, surface water and aquifers through poor sanitation.
- Irrigation is overwhelmingly the largest use of the water from each of these aquifers.
- Such an effect has been enhanced by the extended, often illegal, overpumping of the deltaic aquifers.
- A less pleasant possibility was that we had intercepted an aquifer.
- If dry-based ice covered the area, the aquifer would have become inactive.
- There are over 100 surface pumps that remove water from aquifers, geologic units where water is stored between grains of sand or in rock fissures.
- But the complex geology overlying the mountain aquifers continues to challenge researchers.
- The artificial recharge of aquifers could help to counter overexploitation of groundwater resources.