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<br />w <br />C> <br />,.. <br />',v <br />0) <br /> <br />, NASQAN II <br /> <br />The U.S. Geological Survey (USGS) is redesigning the National Stream Quality Accounting <br />Network (NASQAN) for the third time in its twenty-four year history in response to: <br /> <br />· The need to integrate with new water-quality programs in the USGS, principally the <br />NationalWater Quality Assessmentprogram (NA WQA). <br /> <br />· Societal needs for information on a' broader range of chemical constituents than were' <br />measured in the previous programs'. <br /> <br />. The inability to meet previous program objectives with current monetary resources. <br /> <br />In this redesign, the following assumptions were made: <br /> <br />.' Level funding. It was anticipated that the NASQAN budget would remain at $3.1 million <br />for the next several years. <br /> <br />. NA WQA Implementation. It was assumed that NA WQA would be implemented as <br />designed with a perennial rotation among study units. <br /> <br />'. Planning horizon.' It was assumed that the present NASQAN redesign would, be reassessed ' <br />after 5 yearsbf program operation. NASQAN II has an adaptive design and will evolve, <br />annually to Some degree, but the entire set of design assumptions will be fully reviewed <br />after 5 years. <br /> <br />The USGS was able to retain support for 8 NASQAN stations in the Colorado River Basin. These <br />include: Upper Colorado River basin above Cisco, Green River basin above Green River, San Juan <br />River near Bluff, Colorado River at Lee 'Perry, Colorado River basin above Diamond Creek, <br />ColQrado River basin'below Hoover Dam, Colorado River basin above Imperial Dam, and the <br />Colorado River at the Northern International Boundary above Morelos Dam' near Andrade. <br />.' ,. <br /> <br />12 <br /> <br />