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<br />130::743 <br /> <br />. <br /> <br />September O~, 1991 <br /> <br />Gunnison River Basin water Management and Planning Project <br />Technical Subcommittee Meeting Summary <br /> <br />Location: Grand Junction Projects Office, USBR <br /> <br />Attendees: Mike Gross, CRWCD <br />Randy Seaholm, CWCB <br />Keith Kepler, CDWR,SEO <br />John Ozga, USBR <br />ColI Stanton, USBR <br /> <br />Agenda: See Attachment 1 <br /> <br />Summary of Meeting Discussions: <br /> <br />Agenda Items 1 & 2: <br /> <br />. <br /> <br />-- USBR Denver Office involvement in Phase 1 virgin flow <br />method review and expanded network flow development activities <br />discussed (tied to Gunnison Basin portion of the Global <br />Cl imate Change investigation activities.) (See Attachment 2) <br /> <br />. <br /> <br />An overview of Phase 1 virgin flow development <br />methodologies was presented (see Attachment 3) <br />Applicability of methods applied in Phase 1 methods in <br />developing flows at sites identified in expanded model network <br />was discussed; <br />Decision on sui tibil i ty of Phase 1 flow development <br />methodologies for expanded network flow estimation tied to <br />Denver Office Phase 1 review recommendations: <br />Preliminary indication from Denver Office personnel <br />on Phase 1 review indicated that generally procedures <br />appeared adequate; however, further direction on extent <br />of review effort was requested <br />Draft review comments from Denver Office covered the <br />following (see Attachment 4) <br />Phase 1 flow "difference file" adjustment <br />procedure: al ternati ve flo\>;' balancing procedures <br />for attaining mass balance were mentioned <br />Possibility of investigating alternative <br />regression relationships for extension of flow <br />estimates at "core stations" indicated (e.g., <br />multivariate analyses considering snowpack, <br />temperature, etc.) <br />Development of long term yield estimates for <br />stations used to produce elevation/yield curves <br />applying regression relationships rather than <br />ratio/proration procedure applied in Phase 1 <br />