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<br />limited progress has been made this year for modeling the four new study sites. In January <br /> <br /> <br />2001 a competitive bid process was initiated to find a contractor with the necessary expertise <br /> <br /> <br />to proceed with the hydraulic simulation. A contract should be in place by July 2001. At that <br /> <br /> <br />time analysis of the 2000 bathymetric data can continue. <br /> <br />The impact of switching contractors mid project has been significant. Not only was <br /> <br />time lost in modeling but the new contractor will have a learning curve in order to get familiar . <br /> <br /> <br />with prior work, the data processing steps and local field/hydraulic conditions. Mr. Stewart <br /> <br /> <br />conducted the field surveying, data reduction and the modeling. It is now required that the <br /> <br /> <br />principal investigator will have to spend much more time in these activities. New study sites <br /> <br />will not be added to the project until all existing sites have been modeled. This necessitates <br /> <br /> <br />new techniques evolve for producing flow simulations needed to map fish habitat. It may be <br /> <br /> <br />that these functions could be performed in-house in the future and therefore these changes <br /> <br /> <br />may result in a more efficient data collection and processing in the future. <br /> <br />Habitat Availability <br />An objective of this study is to determine if consistent trends in fish composition, size <br /> <br />and density found at different locations are correlated to the physical habitat composition at <br /> <br /> <br />those sites. If strong relationships are found, these data can be use to justify habitat suitability <br /> <br /> <br />for these fish and used in future modeling on impacts of flow on habitat availability. Pools, <br /> <br /> <br />runs, rimes and rapids are the broad habitat categories and are referred to as meso-habitats. <br /> <br />Pools have low velocity, runs have moderate velocity, riffles are swift areas and rapids are <br />areas with fastest current. <br /> <br />Habitat availability is a function of channel morphology and flow. Channel <br /> <br />morphology is relative constant in the base flow period and at this time habitat availability <br /> <br />varies mostly with flow. To quantify fish habitat availability it is necessary to define habitat <br /> <br />18 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />