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<br />( <br /> <br />rJ <br />o <br />("') <br />0) <br />00 <br />N <br /> <br />sampling, nonnative fish communities in secondary <br />channels and backwaters would be characterized <br />using seines, electrofishing, nets and other <br />applicable methods. Physical and chemical habitat <br />at each sample location would be characterized <br />along representative line transects. <br /> <br />CATEGORY - HABITAT FLOW RELATIONSHIPS <br /> <br />Status: <br /> <br />Lead Agency: <br /> <br />Tasks: <br /> <br />Timeline: <br /> <br />Objectives: <br /> <br />Ongoing Core Research Program <br /> <br />Bureau of Reclamation, Denver <br /> <br />Analyze 1991 video data <br />Conduct additional video imagery in FY 1992 <br /> <br />Phase I and II (FY 1991 thru 1994) <br /> <br />Quantify habitat availability of specific habitat <br />types at different flow levels. <br /> <br />Verify the accuracy and predictability of the flow <br />to habitat relationship results <br /> <br />Research Need: Habitat availability at different flows is an <br />important facet of the overall research plan which <br />seeks to determine the biological response of <br />target species to more "natural" flows in the San <br />Juan River. Determination of habitat/flow <br />relationships is integrally related to other <br />ongoing research which deals with habitat use by <br />target species. Riverine habitats must be <br />quantified in order to determine the relationship <br />between habitat availability, habitat use by target <br />species and the impact of flows on target species. <br /> <br />Methods for collection and analysis of video <br />imagery have been described in various technical <br />reports. Briefly, video imagery is obtained from a <br />helicopter using a Sony high resolution video <br />camera attached to the nose of the aircraft. <br />Imagery is collected at an altitude to insure bank <br />to bank coverage in all frames. The video imagery <br />is interpreted using MIPS (Map and Image Processing <br />System), a PC based digitizing image software. <br />Critical habitats and various riverine habitat <br />components are enumerated and quantified. <br /> <br />( <br /> <br />Methods: <br /> <br /><... <br /> <br />During FY 1992 video data. collected during 1991 <br />will be interpreted using MIPS. A report will be <br /> <br />20 <br />