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Table 2. Descriptions of eight major habitat types. <br />Habitat Description <br />Main Channel Primary river course that carries the <br />major water flow throughout most of the <br />year. <br />Backwater A body of water off the main channel with <br />no measurable velocity; often created by <br />an eddy or drop in water level which par- <br />tially isolates a former side channel or <br />low-lying area. <br />Backwater 1 A backwater formed from an eddy (embayment). <br />Backwater 2 A backwater formed from a side channel. <br />in which water flow is blocked. <br />Side Channel A side channel which carries appreciable <br /> flow during high water and provides a low <br /> velocity habitat during low flow. <br />Eddy A portion of the stream deeper than the <br /> adjacent channel with a distinct <br /> whirlpool effect. <br />Pool A portion of the stream that is deep and <br /> quiet relative to the main current. <br />Riffle A shallow, fast-flowing area where the <br /> water surface is broken into waves by <br /> obstructions wholly or partly submerged. <br />Run A stretch of relatively deep, fast, laminar <br /> flow with the surface essentially non <br /> turbulent. <br />Shoreline The shallow, low-to-negligible velocity <br /> waters next to shore. <br />11