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A review of the USGS National Water Quality Assessment Pilot by Unknow PDF

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About this PDF file: This new digital representation of the original work has been recomposed from XML files created from the original paper book, not from the original typesetting files. Page breaks are true to the original; line lengths, word breaks, heading styles, and other typesetting-specific formatting, however, cannot be retained, and some typographic errors may have been accidentally inserted. Please use the print version of this publication as the authoritative version for attribution.

A national water quality assessment necessarily warrants a large-scale undertaking. Because of the complexity and spatial diversity of water quality issues, a national-level aggregation and integration would be invaluable in maximizing information gained from local experience. Such integration would enhance the ability to generalize from local experience and to adapt knowledge learned from one location to another. Because of complexity and diversity, multiple lines of evidence are often required to develop necessary understanding.

Because the committee is convinced of the need to develop a much greater understanding of our nation's water quality, it has reached the conclusion that a national assessment must take a strong process-oriented approach. While data uncertainty and conceptual simplifications must be properly addressed, the assessment must maintain a strong focus on elucidating cause and effect relationships and developing models that articulate those relationships. In order to meet the goals of a national water quality assessment, the assessment must also be long term.

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A review of the USGS National Water Quality Assessment Pilot Program by Unknow

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