Filters: Tags: Water Quality (X) > partyWithName: U.S. Geological Survey (X) > Categories: Publication (X)
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Ground-water-quality assessment of selected wells in the Fraser River Watershed, Colorado, August 1998, published in 2001. The 20 wells used in this study were sampled in August 1998. In addition to the samples collected to determine groundwater quality, eight quality-assurance samples were collected and analyzed to determine bias and variability in the data. The 20 wells were selected to represent water-quality characteristics associated with overlying land use/land cover, lithology, and well depth.
The ascii grids represent regional probabilities that groundwater in a particular location will have dissolved oxygen (DO) concentrations less than selected threshold values representing anoxic groundwater conditions or will have dissolved manganese (Mn) concentrations greater than selected threshold values representing secondary drinking water-quality contaminant levels (SMCL) and health-based screening levels (HBSL) for water quality. The probability models were constrained by the alluvial boundary of the Central Valley to a depth of approximately 300 meters (m). We utilized prediction modeling methods, specifically boosted regression trees (BRT) with a Bernoulli error distribution within a statistical learning...
Categories: Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Boosted Regression Trees,
California,
Central Valley, California,
Domestic Well Water Use,
Drinking Water Use,
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