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<br />The flow at Sand Wash is difficult to determine because the White and
<br />Duchesne Rivers enter the Green River between Sand Wash and the Jensen
<br />gauge. Furthermore, the Price River enters the Green River between the
<br />Sand Wash site and the Green River gauge which would cause the Green
<br />River gauge readings to be higher than the flow at Sand Wash. Given
<br />these facts, it is still apparent that backwater area at the Sand Wash
<br />site is maximized at flows below 2,423 cfs as measured at the Jensen
<br />gauge.
<br />
<br />Table 9 (Appendix A) presents the backwater number, size distribution,
<br />area, and average size of backwaters for each flow at the Sand Wash
<br />site. The total number of all backwaters ranges from 11, at 1,430 and
<br />1,101 cfs, to 22 at 5,260 cfs. The Sand Wash site is unique because
<br />backwater number is maximized at the highest flow. Furthermore,
<br />backwater numbers are much more evenly distributed among the various
<br />size classes than at the upper sites. The average backwater size ranges
<br />from relatively small at 5,260 (226 M) to quite large at 1,381 cfs (906
<br />m2). Generally, the Sand Wash site has substantially fewer backwaters
<br />and less backwater area per mile than the three upper sites.
<br />
<br />Figure 14 (Appendix A) presents backwater area (m2) versus flow (cfs).
<br />Bank-backwater size was maximized at 1773 cfs, channel-backwater size
<br />was maximized at 1687 cfs and total backwater size was maximized at 1773
<br />cfs. Figure 15 (Appendix A) presents numbers of backwaters versus flow
<br />(cfs). Bank-backwater numbers were maximized at 1773 cfs,
<br />channel-backwater numbers were maximized at 5260 cfs, and total
<br />backwater numbers were maximized at 5260 cfs. Figure 16 (Appendix A)
<br />presents backwater size distribution versus flow (cfs). The <20m2 size
<br />class was maximized at 5260 cfs, the >20m2<200m2 size class was
<br />maximized at 5260 cfs, the >200m2<5002 size class was maximized at 1687
<br />cfs, the >500m2<1000m2 was maximized at 1430 cfs, and the >1000m2 class
<br />was maximized at 1773 cfs.
<br />
<br />Mineral Bottom
<br />
<br />Table 10 (Appendix A) presents the area of all classes for each flow at
<br />Mineral Bottom. Backwater area was maximized at 3,261 cfs with 3,224 m2
<br />(0.8 ac), followed by the 3,814 cfs and 2,648 cfs flows with 1,749 m2
<br />(0.4 ac) and 1,675 m2 (0.4 ac), respectively. Isolated pools ranged
<br />from 0 m2 at 3,814 cfs to 502 m2 at 2,648 cfs.
<br />
<br />Table 11 (Appendix A) presents the backwater number, size distribution,
<br />area, and average backwater size for each flow at Mineral Bottom.
<br />Backwater numbers were maximized at 3,261 cfs (21) followed by 3,814 cfs
<br />and 2,748 cfs with 16 and 14 backwaters, respectively. The Mineral
<br />Bottom site had significantly fewer and smaller backwaters than did
<br />Island Park, Jensen, Ouray, and Sand Wash sites. Average total
<br />backwater size was 109 m2 at 3,814 cfs, 154 m2 at 3,261 cfs, and 120 m2
<br />at 2,748 cfs.
<br />
<br />Figure 17 (Appendix A) presents backwater area (m2) versus flow (cfs).
<br />Bank-backwater size was maximized at 3261 cfs, channel~backwater size
<br />was maximized at 3261 cfs and total backwater size was maximized at 3261
<br />cfs. Figure 18 (Appendix A) presents numbers of backwaters versus flow
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