Analysis Of The Influencing Factors Of Groundwater Dynamics In Zhaozhou County Based On The Correlation Analysis Method

Zhaozhou County is located in the southwest of Heilongjiang Province.It is located in 124 degrees 48'12 to 125 degrees 48'03 east longitude and 45 degrees 35'02to 46 degrees 16'08 North latitude.The primary industry is agriculture.Because there are no rivers on the surface of the country and agricultural irrigation water mainly depends on the exploitation of groundwater,the groundwater depth in Zhaozhou County is on the rise as a whole,and the groundwater exploitation in the study area is increasing year by year.The phenomenon of increasing groundwater exploitation may affect the sustainable development of local groundwater.Utilization will affect the safety of local groundwater system.Based on the field survey in Zhaozhou County,Heilongjiang Province,this paper studies and analyses the local hydrogeological parameters and related data of groundwater monitoring wells.In order to ensure the smooth development of water-saving and grain-increasing operations in Zhaozhou County,western Heilongjiang Province,it is necessary to study the influencing factors of groundwater dynamics.Based on the annual average groundwater table depth data of 32 long-term groundwater observation wells for many years,it can be concluded that the groundwater table depth of Zhaozhou County has little change between years,but it is in the growth trend.The influencing factors of groundwater dynamics in Zhaozhou County are analyzed from the groundwater exploitation,precipitation and evaporation.It is analyzed that groundwater chaotic exploitation occurs less frequently because of the poor protection of groundwater consciousness of residents.Through correlation analysis,it is concluded that groundwater exploitation and evaporation in Zhaozhou County are positively correlated with groundwater depth,that is,the greater the groundwater exploitation and evaporation,the shallower the groundwater depth,and the negative correlation between rainfall and groundwater depth,that is,the greater the precipitation,the shallower the groundwater depth.According to the model,the correlative equation of groundwater table depth with groundwater exploitation,precipitation and evaporation is established:Y=-0.57×X₁/10+0.181×X₂-0.84×X₃/10+647.172.It is concluded that groundwater exploitation,precipitation and evaporation are the main factors of groundwater depth,and groundwater exploitation,precipitation and evaporation are closely related to groundwater depth.Groundwater burial depth is negatively correlated with precipitation;groundwater exploitation is positively correlated with groundwater burial depth;rainfall is highly correlated with exploitation and evaporation,which indicates that there is a significant correlation between precipitation and groundwater burial depth;evaporation is less correlated with groundwater burial depth,which indicates that there is no obvious correlation between evaporation and groundwater burial depth,thus determining groundwater burial depth.Water exploitation and precipitation are the main influencing factors of groundwater depth in Zhaozhou County.