Groundwater can never be pumped out? What to do if the groundwater is pumped out

Groundwater is not pumped forever. Groundwater is formed by the continuous circulation of subsoil and surface water, so the recharge and extraction of groundwater also requires certain time and conditions. If groundwater is pumped excessively, the groundwater level will drop dramatically, leading to the depletion of groundwater.

Therefore, when pumping groundwater, it is important to consider the balance between groundwater recharge and extraction to ensure that groundwater can be sustained**.

Groundwater is often in rocky layers. Mud, that is, the soil is produced by rock weathering, its thickness is very limited, and further down is the rock layer, and the so-called groundwater is gravity water with a stable water surface, not the water contained in the mud, and the mud is mixed together with pore water, non-gravity water, which cannot be used by us. The exchange of water contained in the two rock layers with the surface water is relatively slow, and the stability of the water is good, and the water quality is relatively good, which is the so-called confined water.

The recharge of confined water is distal; Another part of the groundwater also has a stable surface on the rock layer, called diving, and the water quality is also good because of the purification effect of sand and other grains, so the water is very clear, and this part of the water is closely related to the surface water, and it is directly recharged. Groundwater will be drained, if the amount of pumping is too large, so the amount of groundwater pumped must have an approved amount, and its value is less than the recharge of groundwater, so that there is a recharge while pumping, so that it will not be dry, otherwise excessive extraction, of course, there will be no. Your so-called restaurant has not been drained for a year, even if its amount is less than the amount of supplies, it will not be dry.

Over-exploitation of groundwater will lead to a drop in groundwater levels, and continued exploitation will lead to depletion of groundwater, which may lead to natural hazards of land subsidence deficits.

The biggest threat to groundwater exploitation is that once the cracks in the formation are drained, it is easy to cause geological disasters such as collapse and landslides. Especially in some places where the fractures of the formation are filled with groundwater, these water are used as a confined layer to carry the weight of the rock and soil above, and if the confined layer is destroyed, it is very easy to have surface subsidence and collapse accidents.

At present, there have been many examples of sudden subsidence of the surface of many cities in China, some of which are related to the over-exploitation of groundwater.

If the groundwater is pumped out, the earth will dry up and deplete, so it cannot be pumped out, and it must be used reasonably.

If the underground aquifer can be replenished in a timely and effective manner, then the extraction of groundwater is sustainable, otherwise it will cause harm or even serious disasters.

By 2012, the Saudis had depleted 80% of their total reserves of non-renewable groundwater, the agricultural economy was on the verge of collapse, and in 2016, Saudi Arabia ended wheat cultivation altogether and returned to the old ways of exchanging oil for food.

There are nearly 1.4 billion cubic kilometers of water on Earth, of which seawater and saltwater account for the vast majority; More than 98% of freshwater is either in the ice caps at the poles of the earth or buried deep underground, so we should cherish the limited freshwater resources on the surface. Water on Earth is constantly circulating.

Some of this flows through the ocean, atmosphere, and surface, and the other goes underground to become groundwater, most of which eventually flows into the ocean. Due to the huge differences in climatic conditions in various regions of the earth, some places are extremely arid, and groundwater has to be extracted to meet the needs of production and life.

The exploitation of groundwater should conform to scientific laws, and if groundwater is overexploited and not recycled for a long time, it will lead to serious consequences.

1. In terms of environment, pumping groundwater will cause the reduction and disappearance of surface runoff, and will cut off the shallow water source.

2. In terms of geological structure, pumping groundwater may cause stratum subsidence, and China's Shanghai and other large cities have caused two kinds of hazards because of excessive groundwater pumping, one is stratum subsidence, and the other is seawater backflow into the aquifer.

3. In life, groundwater pumping, disinfection, and precipitation are often not in place, resulting in an increase in poisoning and stone disease among the eating population.

It's not that there is any harm in pumping groundwater, but that overexploitation of groundwater can bring some environmental problems.