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Effects of increasing urbanization on ground- and surface-water resources in the Fraser River watershed

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Effects of increasing urbanization on ground- and surface-water resources in the Fraser River watershed

Study Area: Fraser River Watershed
Period of Project: October 1998-present
Project Number: CO315
Project Chief: Jeffrey B. Bails
Cooperator: Grand County Board of Commissioners

BACKGROUND:

The USGS is assessing the effects of increasing urbanization on ground- and surface-water resources in the Fraser River watershed. The population of Grand County has increased 93 percent between the years of 1970 and 1990. The majority of the new development in the watershed will rely on ground water and individual septic disposal systems (ISDS's) for their needs. This study is assessing the potential effects of ISDS contamination on shallow ground-water quality.

This study also is measuring streamflow and the potential effects of urban growth on surface-water quality at one site in the watershed. The results from this study will assist local entities develop efficient land and water-management practices.

OBJECTIVES:

1. To complete a retrospective analysis of all water-quality and water-quantity information available for the watershed.
2. To assess current ground-water quality and quantity in areas of increasing urbanization.
3. To determine effects of ISDS's on ground-water quality in areas of historic ISDS use.
4. To assess surface-water quantity and quality at one site downstream from the majority of the urban land use in the watershed.