Impact of Global Warming on the Groundwater Temperature of Shallow Aquifer in the Plain Area of Central Jilin Province

The physical and chemical characteristics of water and the speed of water reaction can change with the changing water temperature. Taking the plain area of central Jilin Province as an example, the change of air temperature is a governing factor to the temperature variation in shallow groundwater, the function of which is cut down by the precipitation decrease and groundwater table decline. The perennial change of groundwater temperature of two hundred shallow groundwater observation wells in the plain area of central Jilin is analyzed systemically. The results show that under the circumstance of 1. 5 degree C increase of global temperature in the recent twenty years, the temperature of shallow groundwater in the plain area will increase 1. 3 degree C, from 7 degree C in 1978 to 8. 3 degree C in 2001.