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<br />Summary Project Description: Funded by an interagency agreement with the Bureau of <br /> <br />Reclamation Upper Colorado Regional Office, GCMRC conducts monitoring and research on <br /> <br />Lake Powell to meet the following information needs. <br /> <br />Determine status and trends of physical, chemical, and biological components of <br />water quality in the Lake Powell reservoir as a function of regional hydrologic <br />conditions and their relation to downstream releases. These components include <br />temperature, specific conductance, dissolved oxygen, pH, turbidity, major ions, <br />nutrients, trace elements, chlorophyll, plankton, and organic matter. <br />Dctcrmine stratification, convective mixing pattems, and behavior of advective <br />currents in Lake Powell and their relation to Glen Canyon Dam operations to predict <br />seasonal patterns and trends in downstream releases. <br />Determine status and trends of physical, chemical, and biological components of <br />water quality in Glen Canyon Dam releases. <br />Evaluate quality and collection methods of existing data and determine where <br />monitoring activities should be implemented, augmented, revised, decreased, or <br />discontinued. <br /> <br />Decreased funding in the project reflects a combination of personnel restructuring, reduced <br />chemical sample collection and processing, direct funding from USBR for sample analysis and <br />field assistance and redirection of effort in development of the downstream water quality <br />program. USBR supplies support personnel and funding for technical field assistance and <br />maintains service contracts for chemical sample analysis, further reducing the amount of direct <br />funding to GCMRC. <br /> <br />MO's and IN's ADDRESSED: Goal 7, MO's 7.1, 7.2, 7.3; CMIN 7.3.1. <br /> <br />Status/Schedule: Monthly and quarterly monitoring program for Lake Powell. Sampling for <br />major ions and nutrients, temperature, conductivity and dissolved oxygen, and other basic <br />parameters. Reservoir drawdown from current drought has resulted in increased release <br />temperatures, resuspension of deltaic sediments, and the potential for hypoxic releases in 2005. <br />Since 2005, chemical analysis is being provided by the USBR Lower Colorado Regional <br />Laboratory through a service agreement with the UC Region. Beginning in 2004, monthly web- <br />based updates of water quality status have been provided on the GCMRC web site. Data from <br />this project provides a basis for predictive capability for downstream water quality parameters, <br />including temperature. <br /> <br />GCMRC FY2006 Annual Work Plan (Draft, June 10,2005) <br /> <br />23 <br /> <br />.. <br /> <br />;. <br /> <br />. <br />