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<br />Pro'ect <br />Regional Regression Equations - StreamStats Arc-Info Coverage Development. <br />This project is intended to support the USGS Office of Surface Water in the development of a <br />GIS-based software program called StreamStats. This program will allow users to access <br />regional flow equations online by clicking on stream segments on a map of Colorado. The <br />primary benefits are the ability for the public to determine high and low flows at ungaged sites <br />and the increased accuracy in determining basin variables that are used in the regional flow <br />equations. For StreamStats to work properly, considerable background work must be <br />completed. This work involves delineating the variables used in the regional equations into <br />ArcInfo coverages and verifYing the accuracy ofthe coverages. The end product will allow a <br />user to click on any stream section in Colorado and receive a discharge of a specified recurrence <br />(e.g., 100-year flood, 7-day 10-year low flow, etc) based on the regional flow equations, <br />provided the regional equation is appropriate for that stream. CWCB staff currently performs <br />these tasks manually utilizing the USGS Water-Resource Investigation Report 85-4086. A GIS <br />based ro ram would rovide substantial cost and times savin s in erformin such anal ses. <br />Phase III Implementation of Dye Dilution tracer methodologies to monitor late <br />season and winter flow conditions. <br />In FY 2002 & 2003, the Finance Committee and the CWCB authorized staffto work with the <br />DWR & USGS to fund projects for the development of new tracer methodologies to monitor <br />late season and winter flow conditions. Phase I, which was started last winter, involved research <br />to study the practical application ofthis gaging methodology. The results ofthe research <br />showed that the tracer gage system is feasible and can be implemented. Phase II, which was <br />approved last year, was for implementation of the methodologies at one or more sites in <br />Colorado. However, as a result of Phase I research, it was determined that additional <br />engineering and development ofthe tracer equipment was required. Last spring, the USGS <br />acquired additional funding for this project, and CWCB funds authorized in 2003 will also be <br />utilized to perfect the technology for tracer gages. <br />This request is for Phase III implementation ofthe tracer methodologies, which will involve <br />installing a working tracer gage with telemetry equipment at a site where the CWCB requires <br />winter flow data. The total amount requested for phase III is $45,000. The USGS will provide a <br />$24,000 match. A potential site, previously identified in Phase II, is the Officers Gulch staff <br />gage which is used to monitor Copper Mountain's compliance with the 1986 DNR / Summit <br />County Ski area agreements. Aoother potential site is located on the Snake River near <br />Keystone. <br />The total amount ofCWCB funding for all three phases is $150,000. The total USGS matching <br />funds amount to $101,000. The detailed USGS ro osals are available for review. <br />ISF low flow warning system utilizing existing satellite gages. <br />This is an on-project that was initiated in FY 2002. It involves coordination with the DWR and <br />USGS, as well as IT programming to automatically alert CWCB staff when low flow conditions <br />Ta~~diW--O-~Jl{lnliilll.+i~j_'loohI--;tbn"'1~ii ~ ~ ~:;,...-n ~.!=-,jl--- -.h. ..J,~"",. <br /> <br />Estimated Cost <br />$75,000 <br /> <br />$ 45,000 <br /> <br />$15,000 <br /> <br />