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Table III. Evaluation of Program Effects on the Piping Plover <br />18 <br />Potential Sources of Current <br />Possible Analysis <br />and Future Data <br />Methods' <br />Time Frame <br />A. Program Effects on Piping Plover Habitat <br />1) Program effects on quantity, quality, and spacial <br />distribution of piping plover riverine nesting habitat <br />Data Needs: <br />0 Aerial /satellite photographs <br />0 Trend analyses <br />At 3 -year intervals <br />Open, unobstructed channel width <br />0 Videography <br />0 Quantitative before /after <br />• GIS database <br />comparisons by bridge <br />• Permanent transectS2 <br />segment <br />Data Needs: <br />0 Aerial /satellite photographs <br />Trend analyses <br />At least twice <br />Amount of bare sand substrate at various <br />0 Videography <br />Quantification by bridge <br />annually; 10 -13 <br />discharges <br />Permanent transects <br />segment <br />years <br />• USGS gaging stations <br />2) Program effects on the sustainability of riverine <br />nesting habitat <br />a) Channel morphology/ sediment availability <br />Data Needs <br />WC roost transects <br />Sediment/vegetation model <br />4 -5 annually, for 8 <br />Water Depth <br />USGS/USBR sediment transects <br />Trend analyses <br />years (transects); <br />Unobstructed channel width <br />Permanent transects <br />incidentally, pre - <br />Wetted width <br />Aerial /satellite photographs <br />and post -flood <br />Extent of bare substrate <br />0 Videography <br />measurements <br />Data Needs sediment attributes: <br />0 USGSBOR sediment transects <br />Trend analyses <br />6 times /year, for 5 -6 <br />Sediment load <br />Permanent transects <br />GIS database queries <br />years <br />Sediment concentration <br />Upstream and downstream of major <br />Sediment/vegetation model <br />Grain size <br />inflows and diversions <br />Data Needs : <br />USGS gaging stations <br />Discharge <br />Permanent transects <br />18 <br />