Based On GIS Yellow River Delta Shallow Layer Underground Fresh Water Resources Vulnerable Appraisal

Shallow ground water is a precious natural resources, groundwater vulnerability research is to protect the environment of underground work. as the basis of human activity on the ground, we depend on the increase of ground water pollution vulnerability and its risks analysis and drawing is by the researchers and decision makers of the countries with different regions of the method of the launching of the evaluation vulnerability and made corresponding results maps, for the protection and management of groundwater and land use planning for the application.The first to study of underground vulnerability from its conception, the development tendency of the review and analysis, comprehensive research section of the yellow river delta area of natural geographic factors, geological and the geological condition for, based on this drastic use of appraisal target system and gis (geographic information system) technical platform for regional shallow ground water vulnerability, and full use of the field and the analysis of the water quality data in the shallow ground water quality, and by evaluating subsurface vulnerability verify the results and made some comments based on the underground vulnerability underground water conservation and land use planning advice.As the yellow river delta up national strategies for development and ecological development of Efficient ecological economic zone has become an important task, and the yellow river delta area of the types of freshwater resources, so shallow ground water vulnerability of research is particularly important, for underground vulnerability district judge and water reserves are to protect the aquifer the main means.Based on the Yellow River delta as an example, take the DianMianJieGe, point to an area studied ways, through data collection, and geological and landscape observation and various technical means that the method of combining. The Yellow River delta shallow ground fresh water mainly SO₄^2-,NO₂^-,F^-,CL^-, and main type with hydrological geology map, conform to extract information. Based on the field investigation, combined with hydrogeology material, geomorphic topography condition and the Yellow River delta shallow ground fresh water area type and rich water conditions, the Yellow River delta shallow ground fresh water region can be divided into 16 assessment unit. Because many are geomorphic form in control, makes geological conditions and topography exhibition cloth, also appears tectonic line consistent with tectonic division more consistent, also the line with the shallow ground fresh water type and consistent water-hearing capability division, so the partition can reflect the Yellow River delta shallow ground fresh water vulnerability of difference, can according to each unit by an effective evaluation index parameters respectively.Through the study found the shallow ground water of Yellow River polluted and difficult to easily share in both polluted areas 31.3%, easily contaminated and not easily contaminated, and the proportion of 50.1%, indicating that light Layer half of the vulnerability of underground freshwater resources is relatively low, the other half has been in more vulnerable areas, which with the shortage of freshwater resources in the region consistent with the actual phenomenon. Therefore, in order to reasonably protect the water resources, prevention of water resources shortage, the last article a few suggestions: to strengthen the maintenance of reservoirs have been built, including the dam reinforcement and bottom dredging; promote water-saving irrigation technologies, and improve water use incentives; Artificial establishment of the Xiaoqing River south of the shallow underground reservoir regulation and storage, can control salt water intrusion, increased supplies of natural resources, but also has a good water supply significance.