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The over extraction of groundwater is a human caused activity that causes these ground failures that create pore spaces where water once was occupying. The sudden sinking of the soils surface causes infrastructure damage and a higher risk of flood damage due to the displacement of the Earth's surface.
Groundwater-related subsidence is the subsidence (or the sinking) of land resulting from unsustainable groundwater extraction.It is a growing problem in the developing world as cities increase in population and water use, without adequate pumping regulation and enforcement.
Dual-phase vacuum extraction (DPVE), also known as multi-phase extraction, is a technology that uses a high-vacuum system to remove both contaminated groundwater and soil vapor. In DPVE systems, a high-vacuum extraction well is installed with its screened section in the zone of contaminated soils and groundwater.
Air sparging is a subsurface contaminant remediation technique that involves the injection of pressurized air into contaminated ground water [1] [10] [11] causing hydrocarbons to change state from dissolved to vapor state. [12] The air is then sent to the vacuum extraction systems to remove the contaminants.
When groundwater is extracted from an aquifer, a cone of depression is created around the well.As the drafting of water continues, the cone increases in radius. Extracting too much water (overdrafting) can lead to negative impacts such as a drop of the water table, land subsidence, and loss of surface water reaching the streams.
The groundwater now is not in an area used for drinking water, said the Department of Ecology. The landfill accepted waste from 1958 to 1993 near at the intersection of Kahlotus Road and Highway ...
Groundwater extraction The economic loss caused by ground subsidence in Shanghai from 2001 to 2020 amounted to over 24.57 billion yuan. Restriction of groundwater use, artificial recharge with treated river water, and adjustment of pumping patterns [80] [81] Tehran, Iran Alluvial sediments 217 (2017-2019) Groundwater extraction [41] [82] [83]
Drawdown is often represented in cross-sectional diagrams of aquifers. A record of hydraulic head, or rate of flow , versus time is more generally called a hydrograph (in both groundwater and surface water). The main contributor to groundwater drawdown since the 1960s is over-exploitation of groundwater resources. [2]
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