Statistical methods for a regional ground-water quality appraisal in different land-use areas, Long Island, New York
- Geological Survey, Syosset, NY (USA)
- Geological Survey, Reston, VA (USA)
Water-quality data from 90 shallow wells screened in the upper glacial (water-table) aquifer beneath five different land-use areas in Nassau and Suffolk Counties, Long Island, were compared to assess the effects of human activities and land-use practices on ground-water quality. The areas, which range from 22 to 44 square miles, represent suburban land sewered less than 8 years (recently sewered), unsewered suburban land, agricultural land, and undeveloped (forested) land. All five areas are located on the regional ground-water divide, where downward-moving water recharges the deepest parts of the aquifer system. The approach used in this study is based on the premise that land use may be related to water quality in shallow underlying aquifer systems because the type and amount of chemicals introduced at the surface are frequently related to land use. Once contaminants have entered the ground-water system, hydrogeologic and physical-chemical factors control their movement and fate. As in all natural systems, however, variability in contaminant sources and numerous factors controlling their fate introduce uncertainty in determination of water-quality differences as a function of land use and hydrogeology. These uncertainties need to be appraised statistically. Evaluating ground-water quality in view of these factors requires (1) representative sampling and accurate water-quality analyses, (2) accurate characterization of land use and hydrogeologic conditions, and (3) valid statistical analyses. This presentation will concentrate on the logistic regression analysis.
- OSTI ID:
- 7165716
- Report Number(s):
- CONF-8909230-; CODEN: ACWCA
- Journal Information:
- Preprints of Papers Presented at National Meeting, Division of Water, Air and Waste Chemistry, American Chemical Society; (USA), Vol. 28:2; Conference: 44. lecture meeting of Deutsche Gesellschaft fuer Fettwissenschaft e.V., Trier (Germany, F.R.), 12-15 Sep 1989; ISSN 0099-7293
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GROUND WATER
QUANTITATIVE CHEMICAL ANALYSIS
LAND USE
MATHEMATICAL MODELS
WATER QUALITY
ENVIRONMENTAL EFFECTS
EXPERIMENTAL DATA
HYDROLOGY
NEW YORK
POLLUTANTS
REGRESSION ANALYSIS
SAMPLE PREPARATION
URBAN AREAS
WATER POLLUTION
CHEMICAL ANALYSIS
DATA
ENVIRONMENTAL QUALITY
FEDERAL REGION II
HYDROGEN COMPOUNDS
INFORMATION
MATHEMATICS
NORTH AMERICA
NUMERICAL DATA
OXYGEN COMPOUNDS
POLLUTION
STATISTICS
USA
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)