Study On Vulnerability Evaluation On U(ⅵ )pollution To Groundwater Environment In Uranium Tailings Pond Area

In this thesis, it applies DRASTIC model of overlay and index methods to research vulnerability evaluation of special pollutant U(VI) in groundwater environment. Refer to quota and weight of pesticide and heavy metals, apply fuzzy mathematics and entropy-right theory to determine quota and weight of natural U(VI) indicator and evalue special vulnerability of groundwater pollution in target area and make quota and weight successive and scientific.In order to know potential vulnerable conditions of groundwater, in this thesis apply MapInfo software to draw the influence of each indicator on groundwater vulnerability of uranium-tail-area and analyze vulnerability and distribution of uranium-tail-area. Static vulnerability access gram and dynamic vulnerability access gram of uranium-tail-area groundwater vulnerability can be attained by plus of access gram of indicators and their corresponding quota. And applying those to access inherent comprehensive vulnerability, dynamic comprehensive vulnerability after 100 years, dynamic comprehensive vulnerability after 1000 years and dynamic compreh- ensive vulnerability after 5000 years.Results showed that, static vulnerability of uranium-tail-area is of light pollution, hard to get contaminated.It increased the possibility of groundwater pollution after induction of natural U(VI) and make it vulnerable to be polluted. However, It indicated through comparison of groundwater vulnerable access after 100, 1000 and 5000 years that concluded through comparison of groundwater vulnerability access after 100, 1000, 5000 years that velocity of groundwater vulnerability after 100 to 1000 years tended to be of medium-sensitivity and vulnerability of 1000 to 5000 years tended to be smooth.