Laserfiche WebLink
<br /> <br />- <br />Q) <br />a; <br /> <br />III <br />Q) <br />l/) <br />Q) <br />> <br />o <br />.c <br />III <br />l/) <br />.... <br />Q) <br />..- <br />Q) <br />E <br />- <br /> <br />CHAPTER 2: ECOLOGICAL OVERVIEW-POSTFLOOD RECOVERY AND ECOSYSTEM MANAGEMENT 17 <br /> <br />c: <br />o <br />:0:: <br />III <br />a; <br />Q) <br />Q) <br />Cl <br />III <br />(!) <br /> <br />134 <br />133 1989 <br /> <br />132 <br /> <br />131 <br /> <br />130 <br /> <br />129 <br /> <br />128 <br /> <br />127 <br /> <br />126 <br /> <br />134 <br />133 1990 <br /> <br />132 <br />131 <br />130 <br />129 <br />128 <br />127 <br />126 <br />134 <br />133 <br />132 <br />131 <br />130 <br />129 <br />128 <br />127 <br />126 <br />125 <br /> <br />1991 <br /> <br />Hydrographs at Lock & Dam 25 <br />Tailrace <br /> <br />(Site flowing at 129.6m) <br /> <br />~ <br /> <br />Site flowing at 129,6m) <br /> <br /> <br /> <br />(Site flowing at 129.6m) <br /> <br /> <br />Jan <br /> <br /> <br />Figure 2--11. Annual hydrngraphs during a drnught year (1989) <br />and two "normal" years (1990. 1991) for upper and lower pool <br />locations in UMRS Pool 26. Note drawdowns in lower pool <br />reaches that correspond to flooding in upper pool reaches. The <br />horizontal lines on the upper pool graphs represent the stage at <br />which a particular slough becomes a side channel. The horizontal <br /> <br />134 <br />133 1989 <br />132 <br />131 <br />130 <br />129 <br />128 <br />127 <br />126 <br />134 <br />133 <br /> <br />132 _ <br />131 <br />130 <br />129 - <br />128 <br />127 <br />126 <br />134 <br />133 <br />132 <br />131 <br />130 <br />129 <br />128 <br />127 <br />126 <br />125 <br /> <br />Hydrographs at Lock & Dam 26 <br />Impoundment <br /> <br />(Site dry at 127.2m) <br /> <br />.v-v- <br /> <br />4>'_ <br /> <br />M'U. <br /> <br />1990 <br /> <br />(Site dry at 127.3m) <br /> <br /> <br />1991 <br /> <br />(Site dry at 126.8m) <br /> <br /> <br />Jan <br /> <br />lines on the lower pool graphs represent the stage at which a par. <br />ticular backwater site is exposed. The upper pool hydrograph is <br />characteristic of an unregulated system. The lower pool figure <br />represents the degree to which flow regulation can disrupt eco- <br />logical processes (source: Theiling and others. 1996). <br />