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Correlation Between Nitrate Contamination and Ground Water Pollution Potential
Author(s) -
Chowdhury Shafiul H.,
Kehew Alan E.,
Passero Richard N.
Publication year - 2003
Publication title -
groundwater
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 94
eISSN - 1745-6584
pISSN - 0017-467X
DOI - 10.1111/j.1745-6584.2003.tb02415.x
Subject(s) - groundwater , nitrate , pollution , aquifer , environmental science , hydrology (agriculture) , contamination , water well , vulnerability (computing) , water pollution , groundwater pollution , environmental chemistry , soil science , environmental engineering , chemistry , geology , geotechnical engineering , ecology , computer security , organic chemistry , computer science , biology
AQUIPRO, a PC‐based method, was used to assess aquifer vulnerability using digital water well logs. The AQUIPRO model is a parameter/factor weighting system for rating the pollution potential of an aquifer. This method uses the well depth, as well as the clay and partial clay thickness in a well, to generate pollution potential scores. In this model, aquifer protection increases as the AQUIPRO vulnerability scores increase and ground water pollution potential decreases. Computerized water well records of 2435 domestic wells with partial chemistry data were used to determine the ground water pollution potential of Kalamazoo County, Michigan. Theoretically, low AQUIPRO pollution potential scores should have more frequent occurrences of ground water contamination events than areas with high AQUIPRO scores with similar land‐use, well construction, and well densities. The relative AQUIPRO scores were compared with the frequency of occurrences of nitrate‐N in ground water wells. The average nitrate‐N concentrations within each relative AQUIPRO vulnerability scores category were also compared. The results indicate that domestic wells containing 5 mg/L or more nitrate‐N showed a positive correlation between the frequency of occurrences of nitrate‐N and relative decrease of AQUIPRO ( r 2 = 0.99) vulnerability scores. In other words, as the ground water pollution potential increases, the occurrence frequency of nitrate‐N also increases. Furthermore, the results show that as the relative AQUIPRO ( r 2 = 0.96) vulnerability scores decrease, the mean nitrate‐N concentrations also increase.