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<br />Table I. Value. of Rafto' Ceellel..ta (C)
<br />ror U.. I~ tb. Rational Mello'"
<br />
<br />TJpo 01_
<br />
<br />--
<br />-.
<br />(C).
<br />
<br />1lwa/ _
<br />
<br />=t::.;r~j:~~~;::::::::::::::::::::::::::::
<br />8.... eu"tb _.. _._._ ...__n.....nn........ ..__n.... ....------.
<br />=~~'I~-~:)!:::.::::::::::::::::::::::::::::::::::::
<br />7Clnl1'totd 1It&S.. uuo__...__"_____..._ .__00____.....__.________
<br />CalUnl.ed 6eld............__..... .... ..___n" ..____________h
<br />Vrba;,. A'...
<br />Flat restdentl&1, with about 3D percalt of _lmpenMnD._....
<br />"'1 resjdenUal, ."Itb about &0 percent of ItI:a lmpenious..._..
<br />Moderately steep residential, with about 10 penlUll of ..
<br />ImperviouS. _ _._._._.. ...._n_n ..,.,.no ___... ..n no. _._ .._
<br />KoderaLely netp bullt up II'U, With about 7tI ....-nt 01_
<br />ImpervioUS. . _. u.. n..u...._... _.. n_ .no _ n_ _.__ _.. _noon
<br />Plat oommerdal, with about 10 peroeDt of.,. tDlpenloua.....
<br />
<br />1.100.'
<br />.......
<br />o.H.t
<br />o.H.I
<br />o.H.7
<br />0.1..0..
<br />0.1.0.1
<br />0.,M.4
<br />
<br />, For flat .Iopes or permeable IOU, .-the low. 9l.luea. F...p IIoPII or
<br />Sm~eable lOil, utt the higher .uues.
<br />. See merenae 12, pp. ""'-48 (or DMII'e dt&aUed data.
<br />
<br />Table 2.-Manninl Roulhneu Coe.cienll. n I
<br />........ .
<br />L a-d .......: hDP I
<br />A. CoDCttteJlipe.......n............u.....n._...u..... O'DII~.DII
<br />B. Corrucated metal plJ)e or pipe 1f'Ch:
<br />I. 2~ by ~1n. Ilom~..tIOD (r1-med pipe).
<br />.. PlaiDorlull'ClQa1ed._..__.......uu...._._u.... ....
<br />b. Paved. 1nvert (taD,e qluea ... lor 26 aDd III per.
<br />cent o1d1eumftreDor: pavad):
<br />(1) F)o..lull dtptb___......m...mm-......... 0.021....011
<br />(2) F)OW'O.8detn,b.._..............m.....m.... D.cr:n~.ole
<br />(I) Flo..0.6d.'P'tb.....u...m....m.mmm.. ..etH,OII
<br />2. ... b,. l.lD. aorruaaUOD. _._...__u_....__......._.____ o.m
<br />I. ~ b)' 2-1D. aorruptloll. (tleld bolIed)..____u..mmh 0.012
<br />C. VIU1~ cia, pipl!_...mm......m...um.m....... 0.012-0.014
<br />f:' ~~~_~~~:~~:.:.:::::::::::::::::::::::::::::: t::1iU
<br />Q. MODOUthic ClD'DcnlA!:
<br />1. ""ooc:llormJ, fOOCb.._.un.._u__...........u____.. "'16-a.011
<br />2. Wooc:llormJ, 1ID000tb._._.....___.m__.__m........ I.Ol2-O.0U
<br />I. SLel!lIonns....u~_.__..u_unn...____..nn....... D.01H.01I
<br />B. Cemented rubble muoDl'J...us:
<br />1. Conmte floor ami top._.__......___.....m.m...__ 0. 017..o.azz
<br />2. NatW'&l floor. _..__..____._....__.._.._..______.._... 0. Ot8-0.035
<br />I. Laminated. trtt.ted.ODd n_.__'__""_'____"""." o.DtKal1
<br />J. Vltrl8td cia)' I1ner Pw.._...__.___..u.____........... 0.016
<br />D. U." opea _1'1": I
<br />A. Concrete, w1tb lurfac. u ID4ka&lld:
<br />I. Formed. DO blab _....~.....__....___.___......... 0.011-0.017
<br />2. Trowel ftnllh._____...__...___.....__................ 0.013--0.0t4
<br />I, Float ftnisb.........__.__.......___........_......_.. 0. 011-0.011
<br />4. Float ftnlsh, IOme .,.vel oa boUom ..._..__......... 0. 016-0. 011
<br />I. Gunlte, cood 1ICt10D....___..........._............__ ..Ol.....oai
<br />.. Ounlte. ..vyleetlon.........._...........______.__. 0.011-0.0122
<br />B. Concrete bottom fI~~ftnllMd. .des u IDdicS&eCl:
<br />I. DI"8II8C1It.one In tDortar. ._~..........n_............ ..011-0.017
<br />t. Random IIonflln mortar .......__............._____ 0.011..0._
<br />a. Cementrubb~D'lUGnrJ'_....~...___.......~..._....__ O.~_
<br />... Cemen1.rubble 1II;asonI')', pluleftd. .m._..".'''.'' o.mM_
<br />.. D'7 ..bble (rI...p). ......__........................ ..-...
<br />C. Granl bottom, .14et1 u IDdtcaIeCI:
<br />I. Formed conC2'etie .............n.........__._........ 0..017-0._
<br />2. Random done ID morIIrn..nu........._._......... o.fD0..4.OII
<br />.. DI'J rubblt (rlprtr,p)_....~.__......_...._.~...u..... G.DII-O.OI3
<br />D. BrIdi: ..a.u............n.._.__......_.........~.....d 0.016-0.011
<br />
<br />I'ootnotee to T.ble 2 apPflU' OIl p. It.
<br />
<br />....
<br />....
<br />....
<br />....
<br />....
<br />
<br />D. u..d.... ..~tlDaed M~ ,.
<br />E. ~., .....
<br />~ ~h:::::::::::::::::::::::::::::::::::::::::::~:: :=:
<br />X: ~=ftiMiiWt:......n--.----.-_.-..-... 0.011-0.01.
<br />&: =:;u~cm::::::::::::::::::::::::::::::::::::: tfiti =
<br />m. U.uned....~:1
<br />A. Earth, untlOl"lD teeUan:
<br />I. Clean, t'eCleDtlf ClOIDpJded....____n.~.........._____ 0. 016-0.011
<br />2. Clean, aftn.ta1.bertna:.u_........__~.__............ 0,011-O.0:J0
<br />I. With ahortlP''', few 'WeedI..__.m..~......_uo_____ 0. 022-(1. 027
<br />C. In .,.velf, lOll. uniform lICtioD, eIean.____...m.... 0.022-0. 026
<br />B. !:.-th, fairly lmifanD 1eCt10D:
<br />1. No vecet.UODn.._...__.___..__..u...........__._... O.m-o.02S
<br />2. O,....1OIDe wwds.u..._..........._.__._....__.____ 0.025-0.030
<br />I. De.. weeds<< ~uatic pltDts 10 4eePehUlDell..__.. 0.081).(1.035
<br />4. BIdes, dean.lf.ve bottom_....m......_.._h__._m 0.025--0.030
<br />.. SideS. deaD., aobble bo&t.om.....h___........umm O.oao..o.OtO
<br />C. ~D!:e"lcanted<<dhdp4:
<br />~: ~~::O:;.bi.Dti:::::::::::::::::::::::::::::::: ~:~:~
<br />D. Rock:
<br />1. B_d OD delicD-.ton..........._................__
<br />2. B_d on actual mean 1elCtioa.:
<br />.. Smooth!IDd unU'arm...._........_...__...u__n__ 0.015--0.060
<br />E. Cb~-rr~ ~~~-_dlUici-biUih.UiiCUi:.--.- O.~.OU
<br />1. DeDII! ..ell. hilh as 40w depth..m._.. ..........__ O.ClI--(l.12
<br />2. Clean botLom, brl.llh OD.cles.........._hh......... O.OH.08
<br />I. Ca.n bottom brulh ODsides. birbelt "'of80w._. 0.01-0.11
<br />4. I>eDle brulb, NIb 1tIlCf"""""""'"'_''''__''''' 0.IH.1.
<br />IV. H..h..,. ellaaael8.ad ........ wIUl...hrtal"eIII............I'
<br />(values Ibown.re lor ...elodUt&ol2aDd e I.p ..):
<br />A. n.r::eowuptoO.7loo1.:
<br />1. L M:::f:;':J:~~~~'~~~.~_:u.
<br />b. LeD&lb. "" .tbcbeln............~...u.___n.....
<br />.. Good ,",,4,'" .....'
<br />.. !Aneth about 121111llbe1....hu........____.......
<br />b. !Anctil. IIboat::N lDcbeS..u......,....u........__
<br />.. FUr ICaDd, ., ~:
<br />.. LeDc1.h abOUt 12 iDcbes..........._.n_._._....... O.IH..
<br />b. ~about::N1DcbeI._..w.._'n.__h.m......._ O.2J.Q.ll
<br />B. ~:::r:::::i~.:.~.~~"~~.~:m G.GH..
<br />b. uDl\b 4t.o61Dt:heS._._.__.nnu.__.......______. O.(Ii&.4).CM
<br />2. Oood.au.d. UlllVti8:
<br />.. 1enctbabout 12iDcbe1..___........u.__......__.
<br />b. LeDl\h about 111 iD:cbeI..._______......u.........
<br />I. Fair IlaDd. aa, 1f'UI:
<br />L Le.ctb .boul12lDches.._...............uu__uu
<br />b. LeDc1.b about 1lI tDchesu__.......~__..__..__....._
<br />Y. ser.. ... ...._WQ ..-. ~
<br />:: MEl:f=::.::~~~~~~~~~~~~~~~~~~~~~~~~~
<br />2. BoUlb ~ure...._n.......______..n._.uu..u..__
<br />C. CoDc:re1e 1U1W with upbaIt paftlDlZlt:
<br />1. Smooth........ ...__....~..__.....__u__.._..._..__..
<br />2. Roach.n......__.......___.........nnn.....______
<br />D. Coocnk pa......t:
<br />1. Pklat 1lDish....__.....n...___n..~..______nn..____
<br />2. Broom bIab........__......n....____...____..____..
<br />E. For IUtlen wltb JlDSI1I1ope, wben IlldJmeIlt 1Dlt.J" Ie'
<br />cumulate, IDcnue aU .bove .....m. 0'. b'.._no...n
<br />\'I. Nat.raJ .....ID e"'~:'
<br />.. M1nor 1traamS' (~ widUa alloott IIap ... IbaD
<br />100ft.':
<br />1. Falrl)' rerular-*kID:
<br />.. BomeCfUllaadweeds,Ut1.leorDO'bruIb.....m_.. O.OIG-CI..
<br />b. Den-. crowth 01 weedt, depth ot &0. maleIiaU)'
<br />JI'M\eI'1.baD weed beIIht........._____.__.____.. O.~.oa
<br />Co BOme weeds. U&bt brush OD bUlt...........__n...~. 0......,06
<br />d. 80me 'lli'eed~, benl brush oa bulb...____...._.._ 0.06-(1.07
<br />.. Some wteds, deDa WWO....oa ~I..n__..n__n 0.-.0.01
<br />L For InIeS w1ibID chaDDtl, .Ub bQnehes sub!Dlrpd
<br />at b1lh It.a&e.lDlnUt' aU above valUII b7.__m. "01~10
<br />2. 1neru1ar lflttioDl. wltb pools, IUcbt tIwmel meu.der:
<br />IIlcnaae ..lues In 1 ... .bou1......'___n.._m~..... o.Ol~D2
<br />I. MountalD streamS, DO 'ftCetaUoD Ib chume1. baDkt
<br />uually steep, t.ree:s.md brulbaloDc baDktlUbmtIpd
<br />.....h_"
<br />.. Bottom ol'cnvel, oobblel,lDd III" bouldIn....... 0.06-0.06
<br />b. Bottom oIoobbIM.. db Iarp bolaldIn.__.......__ 0.0&-0.07
<br />
<br />.....
<br />
<br />.
<br />
<br />0.0'7-0. CMS
<br />0.08--0.06
<br />0.16-0."
<br />0.10-0.16
<br />
<br />0.~.0'7
<br />0.......10
<br />0.10-0.06
<br />a.11~ot
<br />0.012
<br />
<br />..OU
<br />0.01&
<br />
<br />UIJ
<br />0.015
<br />
<br />0.014
<br />0.016
<br />
<br />.....
<br />
<br />IS
<br />
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