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Table II. Evaluation of Program Effects on Interior Least Tern <br />16 <br />Potential Sources of Current <br />Possible Analysis <br />and Future Data <br />Methods' <br />Time Frame <br />Data Needs- sediment attributes: <br />0 USGSBOR sediment transects <br />Trend analyses <br />Annually, 10 -13 yrs. <br />Suspended sediment <br />0 Permanent transects <br />GIS database queries <br />Bed samples (grain size) <br />0 Downstream of major inflows <br />Sediment/vegetation model <br />Data Needs : <br />0 USGS gaging stations <br />Discharge <br />Permanent transects <br />b) Vegetation Encroachment <br />Pre- and post- land <br />Data Needs vegetation: <br />Transects at selected areas affected <br />Sediment/vegetation model <br />management activity; <br />Plant class composition (grass, <br />by land management activities <br />0 Trend analyses <br />post- land <br />forbs, woody) <br />0 Permanent transects <br />management repeated <br />Height <br />annually <br />Density <br />Data Needs: <br />0 Records from USGS gaging stations <br />0 Aerial photographs <br />Monitoring on an <br />Discharge <br />Records of timing and magnitude of <br />Videography <br />ongoing basis <br />Quantity, distribution of bare <br />EA releases <br />0 Sediment/vegetation model <br />sandbars <br />Occurrence of thick, erosive ice on <br />river <br />c) Project level land management <br />Pre- and post - land <br />Data Needs channel morpholoy: <br />Transects across selected areas <br />Trend analyses <br />management activity; <br />Water Depth <br />affected by land management <br />Sediment/ vegetation model <br />post- land <br />Active channel width <br />activities- upstream, through and <br />management repeated <br />Wetted width <br />downstream of treatment area <br />annually <br />Height of sandbar (cleared) <br />Volume of sediment added <br />(island leveling, channel <br />widening) <br />16 <br />