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Table II. Evaluation of Program Effects on Interior Least Tern <br />Potential Sources of Current <br />Possible Analysis <br />and Future Data <br />Methods' <br />Time Frame <br />Data Needs- sediment attributes: <br />USGS /BOR sediment transects <br />0 Trend analyses <br />6 times /year, for 5 -6 <br />Sediment load <br />Permanent transects <br />0 GIS database queries <br />years <br />Sediment concentration <br />Upstream and downstream of major <br />Sediment /vegetation <br />Grain size <br />inflows and diversions <br />model <br />Data Needs : <br />USGS gaging stations <br />Discharge <br />Permanent transects <br />b) Vegetation Encroachment <br />B. Pre- and post- land <br />Data Needs vegetation: <br />Transects at selected areas affected <br />Sediment/vegetation <br />management <br />Species composition <br />by land management activities <br />model <br />activity; post - land <br />Height <br />Penmanent transects <br />Trend analyses <br />management <br />Density <br />repeated annually for <br />8 years <br />Data Needs: <br />Records from USGS gaging stations <br />a Aerial photographs <br />Monitoring on a <br />Discharge <br />Records of timing and magnitude of <br />Videography <br />continuing basis <br />Quantity, distribution of bare <br />EA releases <br />0 Sediment/vegetation <br />sandbars <br />model <br />c) Project level land management <br />pre- and post- land <br />Data Needs channel morphology: <br />Transects across selected areas <br />Trend analyses <br />management <br />Water Depth <br />affected by land management <br />Sediment/ vegetation <br />activity; post- land <br />Unobstructed channel width <br />activities - upstream, through and <br />model <br />management <br />Wetted width <br />downstream of treatment area <br />repeated annually <br />Height of sandbar (cleared) <br />Volume of sediment added <br />(island leveling, channel <br />widening) <br />Data Needs- sandbar /shoreline <br />Transects across selected areas <br />0 Trend analyses <br />pre -post land <br />vegetation: <br />affected by land management <br />0 Sediment/ vegetation <br />management <br />Species composition <br />activities- upstream, through and <br />model <br />activity; post- land <br />Height <br />downstream of treatment area <br />management <br />Density <br />repeated annually <br />