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Last modified
1/26/2010 4:17:09 PM
Creation date
8/6/2007 1:47:16 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.101.10.B
Description
Colorado River - Water Projects - Glen Canyon Dam-Lake Powell - Glen Canyon TWG
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
10/1/2004
Author
Schmidt - Topping - Grams - Hazel
Title
System-Wide Changes in the Distribution of Fine Sediment in the Colorado River Corridor Between Glen Canyon Dam and Bright Angel Creek - Arizona - Final Report - 10-01-04
Water Supply Pro - Doc Type
Report/Study
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<br /> <br />002352 <br /> <br />-;;"'''''' <br /> <br />o <br />I <br />o <br /> <br />1000 FEET <br />I <br />I <br />300 IETERS <br /> <br />500 <br />I <br />I <br />150 <br /> <br />I <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br /> <br />[:::~:,:,:,:,:",:':i <br />f..:.:~:':::~::::::::::.i <br /> <br />I AS <br />I <br />I I <br />f'l"//~ <br />~ <br /> <br />RIVER-DEPOSITED OR REWORKED VERY FINE TO MEDIUM <br />SAND (October 21, 1984) <br /> <br />AEOLIAN SAND OR TERRACE DEPOSITS-Silt and fine <br />sand, well sorted <br /> <br />TRIBUTARY DEBRIS FAN-Boulders, cobbles, gravel, <br />sand, poorly sorted; boulders cover more than SO <br />percent of surface area except In tributary streambed <br /> <br />COBBLES AND GRAVEL <br /> <br />TALUS AND BEDROCK <br />ADDITIONAL RIVER-DEPOSITED SAND (1973) <br /> <br />EDGE OF WATER <br /> <br />Low flow.. October 5, 1985,160 m3/s <br /> <br /> <br />High flow, May 20, 1985,1245m3/. <br /> <br /> <br />SEPARATION SURFACE <br /> <br />Low flow <br /> <br />High flow <br /> <br />BADGER CREEK <br /> <br />.X <br /> <br />.' .....:.i: ~J. '.... . . <br /> <br />/ :'..I~",!..>:-.' ";' "-.< . <br />/ :~_....~'... ". ~; ," <br />",B', "\" / <br />'t.." / ." <br /> <br />/ <br /> <br /> <br />B <br /> <br />(IS <br /> <br />,r.......;. <br />~:--!/ j j/ / <br />':' . r AS f / / <br /> <br />:;/ ';:-~;i~: / <br /> <br />;..~..../ <br /> <br />JACKASS CREEK <br /> <br />GENERALIZED SURFACE-FlOW DIRECTION IN <br />RECIRCULATION ZONES <br /> <br />- <br /> <br />Low flow <br /> <br />-- <br /> <br />High flow <br /> <br />r:::;) <br />~ "':>- <br />RAPID ~ <br />~ <br />o <br /> <br />Surface-flow direction of main current <br /> <br />LIMIT OF BREAKING WAVES (WHITE WATER) AT LOW <br />FLOW-At high flow, breaking waves in main current <br />extend downstream to a point opposite center of <br />recircu'atlon zones <br /> <br />DENSE STANDS OF TAMARISK <br /> <br />SP <br />RP <br /> <br />SEPARATION POINT <br />REATTACHMENT POINT <br /> <br />Figure 10. Map showing the distribution of unconsolidated geologic deposits at Badger Creek Rapids. Stippled <br />patterns depict the distribution of tine-grained deposits. Figure is from Schmidt and Graf (1990). <br /> <br />The recirculation zone is an effective trap <br />ofthe suspended load, and eddy bars com- <br />posed of sand, silt, and clay typically fill these <br />zones in Marble and upper Grand Canyons. <br />These eddy bars have been subdivided <br />(Schmidt, 1990; Schmidt and Graf, 1990). <br />Separation bars mantle the downstream side of <br />debris fans and occur near the point of flow <br /> <br />separation. Reattachment bars underlie the <br />primary eddy cell and are highest near the <br />point of flow reattachment at the downstream <br />end of the recirculation zone. Sedimentary <br />structures in these bars demonstrate that bed <br />form migration directions reflect the recirculat- <br />ing direction of the flow (Rubin et ai., 1990, <br />1 994b). <br /> <br />14 System-wide Changes in the Distribution of Fine Sediment in the Colorado River Corridor ... <br />
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