In recent years, over-extractionofgroundwater has caused a series of environmental problems, including ground subsidence. How long will the current over-extraction go unaddressed?
近年来对地下水的超采已经造成的地面沉降、地下漏斗等一系列环境问题，超采还要继续到何时？
2
Three in recent years, many city Chinese due to excessive extractionofgroundwater, produce groundwater funnel, causing uneven settlement, affect the operation and construction of the tower crane.
If the ground-source heat pump are used in open systems, namely the use of direct extractionofgroundwater and pumps refrigerant for heat exchange, and at suitable locations recharge or discharge.