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<br />Staff, in conjunction with the USGS and other affected parties, have identified the following components of the project in
<br />order to meet the goal;
<br />Project Required
<br />Component Description USGS Matching
<br /> Total Cost Fundin Funds
<br />Reconnaissance A reconnaissance of the study reach will be made f1uring late
<br /> Jannary or early February, 2003, The cUlTent low-flow conditions
<br /> resulting from the drought of 200 1-02 combined with plans to
<br /> suspend diversion by the Redlands Canal during November 2002
<br /> through February 2003 provide an unprecedented opportunity for
<br /> the reconnaissance effort to evaluate the geologic"hydrologic, and
<br /> physical characteristics of the study reach. The location of geologic
<br /> features, such as faults, or man-made features, suclt as gravel pits, $ 9,920 $ 2,950 $ 6,970
<br /> that could affect streamflow transit loss in the study reach will be
<br /> noted,
<br />Measurements A series of3-5 discharge measurement sets will be made in the
<br />I study reach, Each set will consist of 5-6 discharge, measurements
<br /> made over a 2-day period at each ofthese sites: (al At or near
<br /> station 09152500, (b) at or near the two downstream stations (at the
<br /> Redlands Canal only whenever streamflow is being diverted), and
<br /> (c) at a number of intermediate locations to be determined during
<br /> the course of the study,
<br /> The first set of discharge measurements will be made during
<br /> February, 2003, before diversion by Redlands Catjal commences
<br /> and for a discharge range of 500-1,500 fi3/s in the, Gunnison River,
<br /> Measurements also will be made at 4-6 intermediate locations
<br /> based on reconnaissance results, These locations, for example,
<br /> could be upstream and downstream of a particular feature that
<br /> might have an effect on streamflow transit loss.
<br /> The discharge measurements will be used in conjunction with the
<br /> stage recorders and the stage-discharge relations to derive the total
<br /> discharge volume at the upstream and downstreanj ends of the
<br /> study reach during the 2-day period. Based on differences in the
<br /> volume for the upstream station and the combined; volume for the
<br /> two downstream stations, the streamflow transit losses or gains will
<br /> be computed. The measurements at the intermediate locations will
<br /> help show if the streamflow transit losses are uniformly distributed
<br /> throughout the study reach or ifthe losses are justin a certain
<br /> location or locations.
<br /> Four additional sets of measurements will be made during April-
<br /> September, 2003, at the three stations and at a sub~et of the
<br /> intermediate locations used in the first measurement set. The subset
<br /> locations will be selected on the basis of results from the first $ 8,980 $ 2,670 $ 6,310
<br /> dischar e measurement set.
<br />Mass Balance The detailed mass-balance analysis of the historical discharge
<br />Analysis records at the upstream and two downstream stations will be made
<br /> during March-April, 2003, using records for the last 5-10 years and
<br /> evaluating discharge measurements, control condipons, stage-
<br /> discharge relations, and other factors at the three stations. The
<br /> discharge records will be analyzed on the basis of:time of year,
<br /> hydrograph position, and discharge range. $ 23,110 $ 6,730 $ 16,380
<br /> Results of the mass-balance analysis and the first $et of
<br /> measurements will be com ared.
<br />Measurements A second set of discharge measurements will be clade at medium
<br />2 flow (1,500-3,000 fi3/s) at the beginning of high-elevation $ 7,700 $ 2,300 $ 5,400
<br /> snowmelt.
<br />
<br />
<br />Flood Protection. Water Project Planning and Financing. Stream and Lake Protection
<br />Water Supply Protection. cOnservation Planning
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