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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br /> 0 E9 <br /> 4834 l \1 CJ E10 <br /> 0 Ell <br /> \1-\1 Green River <br /> x E7 <br /> + E6 <br />-- 4832 J.. E5 <br />+-' <br />'-t- <br />------ \1 <br />Z + :\+ <br /> x <br />0 <br /> 0 <br />- <br />t- 4830 <br /><C 0 \1___~ <br />> 6 x ~+ Vj <br />W x \1 X \1 <br /> 0 <br />--1 x <br />w 4828 ~ x <br /> 0 T <br /> 0 0 8 <br /> I <br /> J.. 0 0 <br /> 0 <br /> 4826 J.. 0 <br /> r g 8 J.. <br /> ... 6 <br /> J.. J.. <br /> JUNE -JULY AUG SEPT <br /> <br />Figure 13. Hydrographs of the Green River and Ground Water at <br />stations in the Escalante Wetlands during 1993 <br />(From Cooper and Severn 1994b) <br /> <br />The Green River is losing water to the east, i.e. into the <br />wetlands, and the wetlands are losing water to the west, i.e. <br />into the river. Water sampling within the wetland indicated no <br />serious contamination and these two flows flush the area with <br />relatively clean water free of any known problematic chemical <br />compounds (Cooper and Severn 1994b). <br /> <br />If the Green River dike was not in place and the wetlands were <br />allowed to flood, the deepest portions of the wetland could be <br />flooded with up to seven feet of water. Water of this depth <br />would likely be sufficient to drown many emergent plant species. <br />Thus, removing the dike would allow the area to flood with <br />potentially very deep water. The high sediment loads and cold, <br />deep water could reduce primary productivity of the existing <br />wetlands. High flows flushing through the wetland may damage the <br />existing wetland and remove the substrate rich in organic matter. <br /> <br />23 <br />