Laserfiche WebLink
RESULTS <br />A total 1043 backwater and low velocity flow habitats were sampled betwe <br />1990 and September 1996. (For simplicity, and because the overwhelming majori <br />backwaters rather than low velocity flow habitats, these will hereafter be cal <br />Numbers of backwaters sampled varied between years and seasons (Table 1). Few <br />were sampled during spring monitoring than summer or fall, because, except for <br />were available in the spring. In addition, no overwinter sampling for the 199 <br />conducted at this writing. Sampling in 1990 and 1991 was not standardized and <br />analyzed only to assist in defining habitat features, not availability or Colo <br />Habitat Features <br />Each backwater sampled was first 'categorized as to type; which was deter <br />method of formation or current condition. These categories; horseshoe vortex, <br />velocity flow-through, migrating sand wave, shoreline eddy, secondary (scour) <br />described in Table 2. Data for type classification was complete for the years <br />incomplete between 1990-1993. This was due, in part, to changes in the class <br />and personnel before 1994. Analyses on these categories were conducted only <br />backwaters for which a type classification was available. Migrating sand wave <br />common class of backwater in the study reach. These occurred most often along <br />sandy flats, often in series of 30 or more. Migrating sand wave backwaters we <br />the reach, that data could be collected only from a representative sub-sample <br />Therefore, although most numerous of the backwater classes, only 43 ;s (285 of <br />