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Last modified
7/14/2009 5:02:34 PM
Creation date
5/20/2009 10:25:48 AM
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UCREFRP
UCREFRP Catalog Number
8274
Author
Pitlick, J. and R. Cress.
Title
Longitudinal Trends in Channel Characteristics of the Colorado River and Implications for Food-Web Dynamics.
USFW Year
2000.
USFW - Doc Type
Recovery Implementation Program Project 48-C,
Copyright Material
NO
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Table 7. Summary of parameter values used to calculate the threshold discharge for initial motion <br />(Q) and the bankfull discharge (Qb). The reaches are grouped by their location relati ve to the two <br />major tri <br />---------- butaries in the study area, the Gunnison River and t <br />---- he Dolores River. <br /> ---------- ------------- <br />Strata ---------------- <br />i'c ----------------- <br />n --------------- <br />Q, --------------- <br />Qb --------------- <br />QjQb <br />-------- <br />RKM -------------- <br />365-328 -------------- <br />11 --------------- <br />0.030 ------------------ <br />0.035 -------------- <br />246 --------------- <br />623 --------------- <br />0.38 <br />RKM 327-316 10 0.030 0.035 211 580 0.36 <br />RKM 298-275 9 0.030 0.035 278 608 0.46 <br />--------- <br />RKM - --- - ----------- <br />274-246 ------ - ----- - --- <br />8 -- - ---- - - - - <br />0.030 - -------- <br />0.033 ----------- - - ---- <br />548 ------ - - - - - --- - <br />979 - ---- - ------------- <br />0.56 <br />RKM 245-206 7 0.030 0.032 519 1021 0.51 <br />RKM 180-153 6 0.025 0.030 497 1320 0.38 <br />- ------ <br />RKM - - ------------- - <br />151-140 ---- <br />5 <br />0.025 <br />0.028 <br />609 - <br />1429 ------ - ------- <br />0.43 <br />RKM 138-126 4 0.025 0.035 650 2929 0.22 <br />RKM 124-113 3 0.025 0.030 561 2012 0.28 <br />RKM 111-105 2 0.020 0.025 659 1543 0.43 <br />RKM 103-77 1 0.020 0.025 n/a 1788 n/a <br />Note: Values of discharge are listed in cubic meters per second; to convert these values to cubic <br />feet per second, multiply by 35.3. <br />1200 <br />H 0 <br />1000 <br />c 0 <br />0 <br />800- <br />0 <br />600- O n / a <br />C 0 __- <br />L <br />° 400 <br />g 1 0 <br />t 200 <br />v <br />tll <br />0 <br />1 1 10 9 8 7 6 5 4 3 2 1 <br />STRATUM <br />Figure 26. Box plots showing the range in discharges that produce initial motion in specific <br />subreaches of the Colorado River. The line across the middle of the box indicates the median; the <br />ends of the box represent upper and lower quartiles; the whiskers represent the range in data, <br />excluding outliers, which are indicated by open circles. <br />38
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