FLOOD01296

• County: Statewide
• Title: Method to Estimate Effects of Flow-Induced Vegetation Changes on Channel Conveyances of Streams in Central Arizona
• Date: 9/16/1998
• Prepared For: Central Arizona
• Prepared By: USGS
• Floodplain - Doc Type: Educational/Technical/Reference Information

Table 8. Bed-material, shear-stress, and flow-duration components determined for sites in centrai Arizona
[lb/W, pound per foot squared; s, seconds; N/A, not available; ---. no data]
Median diameter Ratio of shear
(ds.) stress to
Critical critical
Shear shear shear stress
Site stress stress tolte Estimated Vege-
"urn- Vegetation Mil/i- ta tc (dlmen- flow duration tation
ber type meters Feel (Ib/ft") (lblIt2) sionless) (s) removed
I. Brush ............... 110 0.36 0.51 1.40 0.36 (') No
Ib Brush .....,......... 110 .36 1.07 1.40 .76 No
Ie S.ltcedar .......... 110 .36 1.54 1.40 1.10 14,400 No
2. Brush ............... 88 .29 .53 1.12 .47 No
2b Brush ............... 88 .29 .59 1.12 .53 No
Do. 88 .29 .59 1.12 .53 No
3 Brush ............... 'N/A 'N/A .45 No
4 S.lteedar .......... 85 .28 .97 1.08 .90 No
5. Brush ............... 88 .29 1.27 1.12 1.13 3,600 No
Saltcedar .......... 88 .29 1.27 1.12 1.13 3,600 No
5b Saltcedar .......... 88 .29 .83 1.12 .74 No
Palo verde ,....... 88 .29 .83 1.12 .74 No
6 Brush ............... 94 .31 1.73 1.19 1.45 14,400 No
Willow............. 94 .31 1.73 1.19 1.45 14,400 No
7 Brush ............... 100 .33 2.02 1.27 1.59 3,600 Yes]
Palo verde ,....... 100 .33 2.02 1.27 1.59 3,600 No
8 Brush ............... 150 .49 2.68 1.90 1.41 5,400 Yes]
Willow............. 150 .49 2.68 1.90 1.41 5,400 No
9. Brush ............... 1.0 .003 1.62 .03 54 3,600 Yes4
Willow............. 1.0 .003 1.62 .03 54 3,600 No
9b Willow............. 1.0 .003 1.19 .03 40 3,600 Yes4
ge Brush ............... 1.0 .003 .88 .03 29 3,600 No
Willow............. 1.0 .003 .88 .03 29 3,600 No
10 Willow............. 400 1.3 3.87 5.08 .76 No
11 Brush ............... 21 .07 2.53 .27 9.4 7,200 No
Mesquite .......... 21 .07 .46 .27 1.7 7,200 No
12 Willow.._.......... 30 .10 1.52 .38 4.0 3,600 No
13 Brush ............... 'N/A 'N/A 1.61 No
14 Brush ............... 120 .39 3.25 1.52 2.14 7,200 No
Willow............. 120 .39 1.74 1.52 .80 No
15 Brush ............... 100 .33 1.90 1.27 1.50 1,800 No
Willow............. 100 .33 1.90 1.27 1.50 1,800 No
16 Brush ............... 150 .49 2.17 1.90 1.14 5,400 Yes]
17 Brush ............... 49 .16 1.52 .62 2.45 900 No
~ Palo verde........ 49 .16 1.52 .62 2.45 900 No
18 Brush ............... 130 .43 2.98 1.65 1.81 5,400 No
19. Willow............. .6 .002 1.09 .02 54 3,600 Yes4
19b S.lteedar .......... .6 .002 .62 .02 31 3,600 Yes4
] Removal is not considered possible, and flow duration not estimated if ratio of shear stress to critical shear stress is less than I.
2Channel boundaries are partially composed of soil cement or firm earth and are considered stable.
30bliterated.
4Scoured.
Data Collection and Analysis 19