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goals, purpose, and outline of this report were discussed in the Introduction Section. A <br />Recommendations Section, included at the end of this report, presents recommendations for future <br />research as well as recommendations for changes in the LRP. <br />In 1996 the Biology Committee completed an initial database containing all of the Program <br />information gathered to date (including the 1987 -1990 research activities) on biological, physical, <br />and chemical parameters of the San Juan River. The database is on a GIS (Geographic Information <br />System) platform and includes a map of the river as well as aerial photos of the entire study area. <br />The database is being used by the Biology Committee to expedite integration of study results to meet <br />the various milestones of the Program. The database will continue to be updated as additional <br />information becomes available. <br />A major integration activity during 1997 was the development of flow recommendations. A draft <br />Flow Recommendations report is planned to be completed in early 1998. <br />5.2 Identify, Protect, and Restore Habitats Within the San Juan River Basin <br />Necessary for Recovery of the Endangered Fish Species and Management of <br />the Native Fish Community. <br />5.2.1. Characterize Historic and Current Stream Channel Geomorphology and <br />Associated Riparian Zones. <br />5.2.1.1. Determine Geomorphically Distinct Reaches. <br />Contributing Investigations <br />Studies by Bliesner and Lamarra (1993, 1994, 1995) represent the primary quantitative efforts to <br />identify and characterize geomorphic reaches in the San Juan River. Earlier studies by Meyer and <br />Moretti (1988) and Platania (1990) were the first to divide the San Juan study area into "distinct <br />geomorphologic areas." However, these divisions, based primarily on aerial photograph <br />interpretation, gross fluvial characteristics, geology, and habitat availability, were mostly qualitative <br />in nature. Other researchers have used various methods for partitioning the San Juan River, most <br />often for the purposes of logistics or data analysis. Various reach subdivisions of the San Juan River <br />used during individual Program studies since 1987 are summarized by Holden and Masslich (1995). <br />Findings <br />Eight geomorphically distinct subreaches between Lake Powell and Navajo Dam were defined by <br />Bliesner and Lamarra (1995) based on analysis of 49 factors grouped into the following categories: <br />1. River Valley Geometry <br />2. Channel Contact Geology <br />3. Riparian Vegetation <br />4. Channel Gradient <br />5. Channel Pattern <br />6. Tributary Influence <br />7. Man's Influence <br />8. Aquatic Habitat <br />San Juan River Recovery Implementation Program December 1997 <br />Summary Report C PR -602 -1 <br />