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3 <br />ğĬƌĻ Њʹ 9ƩƚƭźƚƓ ƭĻǝĻƩźƷǤ ĭğƷĻŭƚƩźĻƭ͵ <br /> <br />3®¨« ,®²² %²³¨¬ ³¨®­ <br />Any section of riverbank identified as either severe or very severe was included in a site <br />Recession <br />profile for more detailed analysis. The analysis consisted of calculating the following <br />Rate <br />variables for every section of severe or very severe erosion (Appendix B). <br /> <br />Depth (D): horizontal distance from the toe to the top of the bank; <br /> <br />calculated using GIS <br /> <br />Height (H): vertical height; measured with November 2011 <br /> <br />LiDAR elevation data using GIS <br /> <br />Bank <br />Slope Length (SL): length of diagonal slope; calculated <br /> <br />Cross-Section <br />using depth and height measurements <br /> <br />Depth <br />Recession Rate (RR): annual lateral recession of bank (0.4 <br /> <br />ft/yr for severe erosion and 0.75 ft/yr for very severe <br />erosion) <br /> <br />Length (L): length of the erosion along the river; <br /> <br />calculated using GIS <br /> <br />Length <br />These variables (Figure 1) were used in the equation below to <br />CźŭǒƩĻ Њʹ 5źğŭƩğƒƭ ƚŅ ǝğƩźğĬƌĻƭ ǒƭĻķ ŅƚƩ ƭƚźƌ <br />estimate the annual soil loss. Sandy soil weighs approximately <br />ƌƚƭƭ ĻƭƷźƒğƷźƚƓ͵ <br />100 pounds per cubic foot. <br /> <br /> <br />9ƭƷźƒğƷĻķ {ƚźƌ \[ƚƭƭ <br /> <br />9ƨǒğƷźƚƓ Њ <br />ΛƷƚƓƭΉǤĻğƩΜ <br /> <br /> <br />!³« ² '¤­¤± ³¨®­ <br />All of this information was used to create an inventory atlas of the pool which can be found in Appendix <br />A. The atlas contains erosion severity and photos of the shoreline. <br /> <br />