aquifer

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aquifer

a reservoir of ground water found in underground rock, sand and gravel layers.
References in periodicals archive ?
We need to understand this fact that for mining operations our main target is to depressurize Coal seam roof and floor aquifer not to dewater them completely,' he said and explained that Thar Coal region has mainly three underground aquifers available at 55, 120 and 180 meters, respectively.
He was of the view that mining operations at Block II are continuously depressurizing 2nd and 3rd aquifer only to reach target coal depth of 180m through the network of 27 dewatering wells installed in the periphery of mine in an area of around 1.
From its recent study, NASA concluded that 21 of the 37 largest aquifers (underground reservoirs that store groundwater from rain and snow) are running out too fast to be replenished.
In general, water injected into aquifers has to meet very strict quality standards and stormwater frequently carries a dirty mix of clays and silts that could clog up water pumps designed to move it underground - not to mention other contaminants such as bacteria.
It is inferred that the Bahadur Khel Salts being in the North is the recharge zone and the hydraulic head gradient direction is N-NW for this specific area, have contaminated aquifers to varying degrees which is the cause of the saline underground water in the northern side of Waligai area which is in vicinity of Nala Kasho.
This multilayer system consists of confined aquifers and confining units capped by an unconfined, surficial aquifer.
Since 2000, epistemic community (2) and international actors have created agencies and programs, promoted technical capacity or developed joint projects specific to groundwater that are helping South American countries to include aquifers in joint cooperation initiatives.
A June study in the journal Water Resources Research warned that 21 of the world's 37 largest aquifers aren't being recharged fast enough to meet the demands of agriculture and industry.
Read the full article, "If You Think the Water Crisis Can't Get Worse, Wait Until the Aquifers Are Drained.
Caption: Project Coordinator of the Groundwater Resources Governance in Transboundary Aquifers: Stampriet Kalahari/ Karoo Aquifer Project, Ivica Trumbic giving a presentation at the workshop.
Summary: Arsenic has infiltrated an aquifer that provides water for the Vietnamese capital Hanoi, scientists said .
Aquifers can be huge, containing apparently limitless supplies of water.