GMS-based Evaluation Of Groundwater Economic Loss In Gaosong Ore Field

Draining groundwater is the necessary process of mining activities,on the hand,frequent water inrush accident caused any harm influences by mineral' extraction,on the other hand,the groundwater resources is the basic support condition and foundation of the economic and social development in the mountainous areas.With the development of deep exploiting in China,quality and utilization of groundwater in the mining area will become more and more serious problems.Therefore,it is the key to master the distribution and change of groundwater and reasonably evaluate the economic loss of groundwater,which ensures the social,economic and environmental health of mining areaBased on field study of the natural geography and socioeconomic data of Gao Song field,this paper builds up the evaluation index system of economic loss caused by groundwater,and simulates the spatial distribution of groundwater resources in the mining area,and put forward relevant countermeasures,which provide scientific and reasonable guidance for a scientific and reasonable utilization of groundwater.The main research results are as follows:1,The evaluation index system of groundwater economic loss is constructed.Through a large number of literature review,the assessment of groundwater economic losses are divided into direct economic losses of groundwater and indirect loss of groundwater,the later including groundwater pollution and groundwater water in two parts,groundwater pollution is divided into human health,agriculture,Tertiary industry and ecosystem services,groundwater quality is also divided into residents of drinking water,agriculture,industry,tertiary industry,land subsidence and ecosystem services.2,In paper,we calcuated the economic loss value of groundwater in Gao songfield.By groundwater economic loss index system,the economic loss of groundwater was 10 million yuan in Gaosong field in 2015,fishery and ecosystem service loss service is the largest.Which is accounted for 97% of the economic losses of groundwater in the whole Gao song field3,Calculated the loss value of ecosystem services.According to groundwater simulation system(GMS),Simulating the distribution of mining groundwater space,according to the remote sensing image(landsat8),calculating the normalized difference vegetation index(NDVI),on the basis of Gao song field groundwater level changes and the corresponding normalized vegetation index in the same grid position,and according to the depth of potential drop partition the water level,but conditional probability formula was used to calculate the influence ratio caused by the drop deep influence on the vegetation of each area.Ecosystem service value loss is about 2.8 million yuan,which caused by decline of groundwater level.