Study On The Groundwater Resources Assessment And Rational Development In Yishu Basin

Yishu basin is an important economic development zone in ChangChun-Jilin by the state council approving,which plays a vital role to accelerate and revitalize the economic development of Jilin Province.Groundwater has played an irreplaceable role in economic development in the region,but the condition of the groundwater quantity and quality are not optimistic.Therefore,in order to better provide the scheme of rational utilization of groundwater for Yishu basin,the groundwater resources was evaluated and the sustainable development and utilization of groundwater was also studied.This article is supported by the using program corpusof China geological survey which is “The project of groundwater monitoring and evaluation in Songnen plain?No.1212011089024?”.This article showed the following results:This article is supported by the using program corpusof China geological survey which is “The project of groundwater monitoring and evaluation in Songnen plain?No.1212011089024?”.The groundwater resources quantity including natural resources,recoverable resources and storage resources were evaluated by mathematical method firstly;and then,the groundwater chemical characteristics,groundwater quality and groundwater system antifouling performance were evaluated by groundwater sampling analysis;Finally,the over-exploited area and exploitation and utilization potential of groundwater were also assessed.On the basis,the scheme of development and utilization of groundwater in this study was suggested.This article showed the following results:?1?The types of groundwater in the study area can be divided into Quatemary pore phreatic water in loose rock mass,Quatemary pore confined water in loose rock mass,and clastic rock pore-fracture water.The groundwater system can be divided into 4 systems,9 subsystems and 22 cells.The mainly exploited aquifer was Quatemary pore phreatic and platform feeble confined water.And the total exploited quantity of groundwater was 24249.09 million.The groundwater depression cone was formed in the HuaPi region due to groundwater exploitation.?2?The groundwater natural resources quantity of Dongliao river basin,Yitong river basin,Yinma river basin and Songhua river basin groundwater systems were 32.959 million m3/a,66.826 million m3/a,136.272 million m3/a and 241.162 million m3/a,respectively.The total groundwater natural resources quantity was 477.21 million m3/a.The recoverable groundwater resources quantity were 20.852 million m3/a,44.477 million m3/a,95.962 million m3/a and 175.909 million m3/a,respectively.The total recoverable groundwater resources quantity was 337.2 million m3/a.The storage groundwater resources quantity were 1.847 billion m3,4.656 billion m3,10.301 billion m3 and 14.498 billion m3,respectively.The storageof Quatemary pore phreatic water was 5.92 billion m3;The storageof Quatemary pore confined water was 3.34 billion m3;and The storage of clastic rock pore-fracture water was 22.041 billion m3.The total storage of groundwater resources was 31.302 billion m3.?3?The main cations of groundwater were Ca²⁺,Na⁺ and Mg²⁺,and the main ions were HCO₃^-and Cl^-.The quality of Quaternary pore water was poorer,which the over standard rate was 88.0%.The over standard factors mainly were NH⁺₄,Fe,Mn,NO₃^-,NO₂^-,total hardness and Pb.The antifouling performance index values of the study area were ranged 53 to 100,which showed the antifouling performance was good.?4?The groundwater consumption amount was 242.49 million m3,which was the percentage 72% of recoverable groundwater resources.The surplus amount was 94.709 million m3 which meet the present demand of groundwater in 2012 year.The Changyi distirct of Jilin was the medium exploitation areas,which the other districts was un-exploitation areas.The groundwater exploitation potential index of the study area was 1.39,which has the exploitation potential.The increased exploitation amount was 94.709 million m3/a with the average of 0.28 million m3/km2 a.?5?The strengthen exploration areas were shuangyang district of Changchun,Longtan district,Jingkai district,and Shulan district of Jilin,which the total area was 1530.65 km2.The control exploration areas were chuanying district and yongji of Jilin,yitong of Siping,which the total area was 1547.24 km2.The reduced exploration areas was changyi distirct of Jilin,which the total area was 272.11km2.