Timber will last for a long time below the groundwater level.

A large flood control reservoir (necessary due to the low-lying terrain and high groundwater level) and a parking lot have been built under the square.

The tunneling took place under the groundwater level.

Factors such as population size, topography, groundwater level, as well as locations for pumping stations and the treatment plant, must be taken into account.

The groundwater level was rising fast, and the amount of water flowing in the direction of the ocean was still the same.

When disposed of in landfill, food waste releases methane, a relatively damaging greenhouse gas, and leachate, a toxin capable of considerable groundwater pollution.

Prohibitions on well drilling and groundwater pollution have been passed, but there are no clear mechanisms for their enforcement.

Disadvantages of this process are large electrical power consumption, extensive water use, and the risk of groundwater pollution.

In areas with high population density, groundwater pollution levels often exceed acceptable limits.

Concerns about deforestation at the new site, as well as potential for groundwater pollution have also been expressed.

Experts say groundwater reserves, which make up less than six per cent of the planet's water, are being used faster than they are renewed.

It relies on shrinking groundwater reserves and desalination of seawater, a costly process that consumes a huge amount of energy and pumps brine back into the sea, damaging the environment.

Wetlands recharge groundwater reserves that are hydrological: connected to surface waters.

High population growth, the depletion of groundwater reserves and the impacts of climate change are likely to aggravate the situation in the future.

Only 35% of groundwater resources are being utilized.

After deducting this overlap between surface water and groundwater net renewable groundwater resources were estimated at 2 km/year.

This includes surface and groundwater resources, the interface between freshwater and seawater and water-related disasters.

In the northern parts of the country, both surface water and groundwater resources are nearly fully developed and utilized.

In response to drought, deep wells for irrigation have been drilled which decreased the under ground water level, further draining groundwater resources, which rely on rain for replenishment.