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<br />Table L. -Manning roughness oelliclents, 11
<br />r.
<br />•A
<br />r4
<br />V.1111,1 .1'
<br />1. Cloud ronduil„t a 1,11 11 ill
<br />A. (70111'1ltll• {lila•...
<br />n. Corrullated•metal pipe or 1n1),••nrch.
<br />I. 235 by' It -1n. corrugation ('hetet pipe). 0.024
<br />a. Plain or fully coated
<br />b. I'aved Invert (range vnInes are for 25 and 5(1 persalt
<br />of circumference paved):
<br />0,1121 0 11th
<br />(l) Flow lull depth 0,1111-11 1114
<br />(2) Flow 11.14 depth 0.1110 u, uta
<br />(3) Flow 0.8 Ilepth........................ .
<br />' 2. 8 by 2 -In. cerru;ntlull (field bolted) n 11.1
<br />C. Vitrified cloy pips" 0.012 ,..014
<br />I), CaaI•(roll {line, uncoated... o. 31:1
<br />11.111 . 11.1)11
<br />E. !iter) Alpe
<br />F. Brick 0.0(4 0.1117
<br />(1. Monnllthlcconcrete: u,Ullra.nl7
<br />1. Wood forma, rough 0,1112-11.1117
<br />2. 5Vpod forams, smooth it:.1101172-1;1.1114
<br />3. Steel forms
<br />11. Cemented rubble masonry walls: u'=l
<br />1. Concrete hour and top 0, ((25
<br />2. Natural floor 0.nl!-0.025
<br />I. Lanlln5(11 Waled wood 11017
<br />]. VItrlfiet: clay ]hoer plates
<br />FL Open channels, lined (Straight alinement):
<br />A. Concrete, with surfaces as :ndlcatrd:
<br />0.013 O 1117
<br />1. Formed, no finish a ul t
<br />2. 'l'rowel finish 1. 11111123- 1.1111
<br />3,• Haat flnlsh U.1)(?
<br />4. Float finish, some gravel on bottom. , 5
<br />3. ()none good s('cl(nn............. .... ........ __ a 1115 a 111 11.100
<br />h. ClunIte, wavy section 0. 0(114).1122
<br />B. Concrete, bottom dont finished, sides us Ind(tsttell 11.1(15 n nl7
<br />1. Dressed stone In mortar en
<br />n
<br />2. 1(510lam atone 111 manor 11.0.-11-0.1125, (
<br />3. Cement rubble masonry 0 021(.0 0.017-11 . U. )
<br />4. Cement rubblo masonry, plastered (.11.1 1-0. U3u
<br />5. 1)ry rubble (rlprap)... 41 4�3r
<br />C. (travel bottom, ski's es Indicated:
<br />1, Formed concrete .
<br />2. Raldoal stone W mortar
<br />3. Dry rubble (ritual)),
<br />Il. Bk
<br />E. AslI,richalt: ' 14.711.3
<br />1. Smooth
<br />1).1116
<br />2. Rough 0.01 1.0.013
<br />F. Wood, planed, clean
<br />(l. Cuucretcdined excavated rock: 0.1117-111211
<br />I. flood section. ,1.021-0.0:7
<br />2. Irregular section
<br />III. Open channels, escaraled (straight alinement, natural
<br />lining):
<br />A. Forth, unlf,Lrin seStion: 0.011; O.nIa
<br />1. Clean,''really eumplcuvl"0. 014 1) 1)42 .
<br />2. ('born, alter weathering ..- _... 22
<br />A, 11')111511((2I L3fli, few wlrllr :• a 0 11 11:1
<br />n {I
<br />. 0'022 X127
<br />4. 1rnvnlly rill, unIf,rl nee un, igen,. .. .
<br />• 11. Earth, fairly Indium section: :',
<br />1. No ve1etnll3l( 0. 1122
<br />h .11 I(or,
<br />2. Orals, some wrcda . . . . • .
<br />0311 ,
<br />3. 1 h:rtsu weeds or anionic plants 111 deep ebmmrls..... 0.„1 -0 1115
<br />p 11 15
<br />4. 511104 clean, gravel button' 110,030 (1 11111
<br />5. Sides clean, cobble bottom
<br />C. 1)ragline excavated or dredged:
<br />I. No a rgutallon 0, 0,1m-11.013 11 11.1(!A-
<br />2. 1.1ght brush on hanks
<br />I). Rack: - 0.0.15
<br />1. n*+ed on dc31411 Srrlin'.... .. .
<br />2. Based 011 actual them section:•
<br />n. 0110,0111 hilt' unm ifor0.0pb0.IL 11:1!,-41. 0411 ll
<br />b. lagged awl irrrguku.._ .
<br />F. ('Ilolnels not mn(Ilnlle,1, weeds nod latish uncut: u,ux a 12
<br />I. Dense weeds, high las llnw depth Il 115 n un
<br />2. Clean bottom, brush on sides' . ....
<br />3. ('lean bullnm, 11(110 011 Sides, 1114hrs1 x1041' of Iluw- 11.27 0 11
<br />17 n, N
<br />4. Mose brush, high stage
<br />0,((17-11. n'p1
<br />n
<br />`li7(123-4I.
<br />0:Tl4-0:4177
<br />11'. 111011.•1rI,.11111rIN and a.a1,41 .ill am11,l■0 - 11 Ivo•tapnn
<br />11 .111•'4 •hn•n,. .11,• 1111 '.. 11111 p•, 'I :' Jn( 1. 111 • ,
<br />t 11 p'1, ••1 ,4,v 1)1, 1,. e. 7 1, •d •
<br />1, 111, i1.11•1 ,v1 v.5. Ifo Nuck)' 111(11.1:1 WO,. Ilullnlrgtrt.+": . U7.11.015
<br />N. 51,.,....1O
<br />,•,I 10 2 milli,. 0.07-0.0,5
<br />h. l.,', itI4-0I3rh(o
<br />2. (loud stand, any grass: 0, 1r4-0. 09
<br />' n. 1.1•,410 about 12 inches 0.10.0.15
<br />b. 14/18111 about 2) itches
<br />3. Fair stand, any gloss: U. II-0.Oa
<br />n. Length ,bout 12 111r11N 11.24-0.13
<br />h. ,110 11 about 14 Inches
<br />11. 1)r 1111 of floly 0.7-1.5 feet:
<br />I. 1Irrinudngra`s, hentncky bluegrass, buffnlograss. 034.035
<br />a. Mowed to 2 111c1ws O. O.03r0.01
<br />b. Length 4toIiInches ..........
<br />'2. (I3nd stand, tiny gloss1 Length 31411111 12 II(l•1111U. 120.07
<br />y • 0.22-0.00
<br />b. 1 a•3gl 0 3bont '24 Inches
<br />:I. Fair st:ald, any grass: 0. ;0-0.1)5 14
<br />n. Length about i2 inches 0.17-0.08(,_,
<br />5145111113
<br />n range
<br />b. Length [Mout 24 inches
<br />V. Strect and extlrcasway gutter.): 0.012
<br />A, Concrete gltter, troweled finish
<br />11. Asphalt pavement: D. 013
<br />1. Smooth (Name00.010
<br />2. (tough tcclurc
<br />C. Concrete gutter with asphalt pavement: 0.01:1
<br />1. 11munlll 0.015
<br />Y. Rnu411..-...- _
<br />11.I'nnrleia pavement: D. 1111
<br />I. Float 11(1(4) 11.11(50
<br />1. Ilrnonl Ilnlsh.. • • • . .. ..
<br />Y• For
<br />with
<br />above '
<br />in 1)4111 ', III II11)Illll"" ay stem
<br />0.1(111
<br />VI. Natural stream channel':
<br />A. Minor surnnl5 (surface width 31 flood }Ingo less than 111(1
<br />It.):
<br />1. Fairly regular section:
<br />R J 1.Ilnr ' �:P_911!Lwl3hlla, lilllnncuo (,rush 0• ('10-9 4'li•`�
<br />•
<br />0. I'0 isr. growth' 01 weeds, depth of'llOW italcrlally
<br />0. 0.15-(1115
<br />greater 11oi11 41 red bright .
<br />c. some weeds, light brush on hanks ('.0754).05
<br />II
<br />S(111111siveils, liens' brush on banks 0.05-0.1(7
<br />e, Some weeds, dense willows on hanks 0.08-0.014
<br />f. For trees within ch:nucl, with branches submerged
<br />• 0.01-0.01
<br />,1 1)1411 stage, Memos.: all hhnV( values by
<br />2. Irregular Seel 10111, with pools, slight channel mernder;
<br />0..01-0.0t
<br />Increase colors 414(11 In In -ii about..
<br />:1. Mountain
<br />n(,''(u, `rr soand brtusth incharm',
<br />bankslanks .
<br />sub-
<br />merged n1 11101 slake:
<br />it. Ilattonl of gravel, cobbles, null few boulder 0075
<br />h. Bottom of cobbles, with large boulders '
<br />It. Flood Mains (u'1}lrent to natural streams):
<br />1. Pasture, no brush: 0.030'-0.(135
<br />it. Shutt 4'105 11.035-U.0.')
<br />b. I 1141 grass
<br />2. ('uluvuled 11(1110' 0 03-0.04
<br />o. No crop... -. _
<br />e ,1410'0 111.1 41/110, h. 5L111,.11(11wrrops i• • °117114:441111.(040k75
<br />5
<br />'t Heavy wocds, srulterra 1,111141' ...
<br />4.
<br />). 11' 1.111111 b11,1'nr.,h 1111,.1 1 r111111 11 115.11 1111
<br />i...
<br />0.015-0.15(
<br />5. 51rdlum In dclts(1 brush: 0.07.0.11
<br />11. 11'lnler 0. 11}41. 111
<br />0. Dense willows, bummer, not lent over byretir int_ 0.18-0.21)
<br />7. Cleared (and Milt tree stumps, 1111-1.`,U { :
<br />0
<br />. M-0. °C.. Nosprotita 0.08.0.05
<br />11. With heavy growth of seroma
<br />a. 111^tvy'stand of timber., u few down trees, Mil; under.
<br />growth: 0. ID D. 12
<br />n. F'lu,N111rp111 below handles 0.10-0. 12
<br />b. F'l od depth reaches brunches. I slag' inn'. thawC. Major slreums (stirfaer (5 11110 :(1 1111,10.
<br />Irl fl.): lionglno•ss,rlrfih-Irnt is usually less Ihnn for
<br />ulnar 51.11511115 or rl,dlar trscIlp11n11 311 n1.rn0nt of less
<br />c(Teeti11' resistance offered 14 (rre('nlnr hanks 11r vr4e•
<br />lotion Mired.( uFollowkr.
<br />recommendation 111 I ulilt
<br />hl ntlmr led
<br />If possible. The valor nr n for larger/)11051111 of most
<br />regular section, with noboulders orbrush, may bent tbe O.v I.) 033
<br />runge or. ,
<br />
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