New PDF release: A review of the USGS National Water Quality Assessment Pilot

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In other cases, subregions were combined into a single CSU or a particular accounting unit from one subregion was added to another. In the selection of the surface water CSUs, attempts were made to select ones having similar areas. Modifications were sometimes made to ensure that all sources to a major lake or estuary were contained within the same CSU. An attempt was also made to select CSUs that had relatively homogeneous land use and environmental characteristics. A set of 116 ground water CSUs were also identified.

1. Summary The emphasis on integrated study units will result in an improved program since it will now examine the water quality of an integrated hydrologic system. , surface water or ground water) of the system on the water quality of the other component. The integrated approach will also allow the investigators to ascertain the physics of the system to a greater extent than before, thus enabling them to understand the cause and effect relationships, which could be extended to other parts of the country.

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. NAWQA DESIGN EVALUATION 37 NOTS sampling in the Central Oklahoma aquifer study unit is an example. Statistical hypothesis testing will be used to test hypotheses on the regional distribution of contaminants.

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

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