Laserfiche WebLink
<br />-on.5'i:'" <br />u u .e. <br /> <br />24 <br /> <br />understand bed morphology dynamics, (4) evaluate high terrace erosion and <br />contribution to river sediment. <br /> <br />MO 2: As a minimum for each reach, maintain the number and average size (area and thickness) <br />of sandbars and backwaters between the stages associated with flows of 8,000 and 45,000 cfs <br />that existed during the 1990/91 research flows. <br /> <br />IN 2.1 Characterize sandbarlbackwater baselines and character and structure in 1990/91 <br /> <br />IN 2.2 Working with various resource agencies and specialists, select most appropriate <br />flow levels/regimes under the approved operating criteria to determine baseline <br />for comparisons for all resources <br /> <br />IN 2.3 Monitor future changes in sediment and define balances (channel, banks, bars) <br />and hydraulic processes necessary to maintain 1990/91 sandbar levels <br /> <br />IN 204 Evaluation of flow regime (under the approved operating criteria) impacts on <br />terrace and cultural resources <br /> <br />IN 2.5 Evaluate historical sandbarlbackwater change, and develop methods for <br />predefining beach and sandbar change under operating criteria <br /> <br />IN 2.6 Determine implications of dam operating criteria on beach and sandbar and <br />backwater character and structure, including suitability of camping beaches <br /> <br />IN 1.7 Quantify the extent and location of existing sandbars, beaches and backwaters <br />along the Colorado River corridor <br /> <br />IN 2.8 Assess the effects and use of the spillways on bed morphology in the front of the <br />dam and its effects on power production and biota <br /> <br />MO 3: Periodically increase the average size of sandbars above the 20,000 cfs river stage and <br />number and average size of backwaters to the amounts measured during the high period of <br />1990/91 or the 1996 test of the beach/habitat-building flow in as many years as reservoir and <br />downstream conditions allow. <br /> <br />IN 3.1 Define 1996 and 1990/91 backwater ecosystems and associated flow regimes <br /> <br />IN 3.2 Define historical variation in backwater number and character <br /> <br />Revised 6-10-98 <br />