|
<br />IE,
<br />
<br />n ........... e1lunete-OoDttDued Mumm. it
<br />B...PIood ~ (adjaeent to oatura1 JtreaIDI): rupl
<br />1. PastUre. DO brush:
<br />=: ~~=:::::::::::::::::::::::::::::~:::::::::: :~::r
<br />2. Cultivated areas:
<br />i: i:::A:~=::.::::::::::::::::::::::::::::::: O:?e:55
<br />I. Beavy weeds, seatterm brusb.______nnn______.___ 0.05-0.07
<br />f. r?.:~.~~::;~:~::::::::::::::::::::::::::::: ::::::=
<br />5. Mecllum to den.e bruSh: .
<br />t: :.1:.::;;:::::::::::::::::::::::::::::::::::::::~::
<br />.. DeDI! wtllows, IUIIlIner, DOt bent over by current....
<br />1. CINred lu1d with t.ree stumps, 100-100 per 1Kn:
<br />t-. ~:=.ifOWii.-oiSiiioiiii::::::::::::::::::::
<br />8. Heavy stand Of timber," few down west titUe under-
<br />......b,
<br />a. Floodd~beknfbrancbellmh_h_____m_m___ 0,10-0.12
<br />b. Flooddciptbreacbe!brancbell.mnHhhm______ O.12~.16
<br />C. Major sh'eamS (1W'1'ace width at flood _. more than
<br />100 ft.): Rou&bnesa eoefBe1ent is usually less than for
<br />mlnor streams of similar deserlpt.ion on. account of less
<br />efleet1n resistance oltered by Irregular bank! or Yege-
<br />tation on banD. Valud of. may besomewha& reduaed.
<br />:Follow reeommel1datioo of DOte 7 II possible. The value
<br />01 n tor larger streams of mOlt regular aecUou. wiib 00
<br />boulderIor bruIb. may be In tberanceoltrom.... ,___n. O. 0'J8-0. oaa
<br />
<br />0.07-4).11
<br />O. 10-0, 16
<br />0,15-0.20
<br />O. Of-O. 06
<br />0, 0&-0. 08
<br />
<br />hlllaoteIto Tab" 2
<br />I BstimateI!I ere by Bureau of Publ1e Bo8d8 11DItI!8 otberwtae noted end are
<br />few straIgbt alInement, A small Itlcreue in value 01 " ma:r be made for
<br />dlamel alInemenl; o&ber tbBl1 stta1fbl.
<br />I Ranpa tor 1eClI. I tbroucb 1I are tar cood to fair aonst.rtdlon. Por
<br />poor quallt:r oonstructioo, WIlIlerpr values of ..
<br />
<br />Table 3.- Mulmam permlsolble nloelliee I. erocllble
<br />chnnel.. based on .Direrm Se. in continaou,sl, wet,
<br />&led channels 1
<br />
<br /> N_"'-Olo
<br /> nloc1tlea lor-
<br />N_
<br /> w.... w....
<br /> e..... ~ ~
<br /> ......
<br /> .... cram
<br /> - -
<br /> F.p... l',Pl'6 F.p...
<br />PIDe IlUld ~on<Y>1ll'dd_.J)___m...mu.~.... I.' U
<br />Sandy loam (DOJleolloidal).nm.h.m..... 1.1 ... .,.
<br />SUtloam ="'lIoIdal)___mh_.m.h.____ ... 8.0 2.0
<br />~~IIIb...~::::::::::::::::::::::::: ... ... ...
<br />... ... ...
<br />= .t";~.v;;;,;;iiOjdai)::::::::::::::::::: ... ... 3.'
<br />8., U 3,0
<br />Graded. loam to oobblea (DoDoollo1dal)..... 8.7 ... a..
<br />0.= oI1t to oobOIeo (coIIoIdal)h.___m.. ... ... U
<br />Allu silts =11oIdal)mu~mm~.... ..0 ... ',0
<br />Alluvial stlts coDoIdaI)_.........h.mmu 8., 8.. 8.0
<br />Coene cravel (DODoollotdal).....mo....... ... a.. ...
<br />Cobb1el BI1d sbiDaIeI__.__.___n~..__n_..._ a,O ... ...
<br />Sbales BOd bard p&IIlI_.u.._...__n_.._.nn a.o a.o a.o
<br />
<br />I Alreoommended by Special Commltteeou Irriptloo -.reb .Amertc8.D
<br />Society 01 CIv:U BDIIrieeri. 1826. for chaDDela with ItraIcbt aliDement. Por
<br />baoua ebume1I multiplyaUoWable ve1ocltyIwO.96" aUlbtJr 0=
<br />0..... ................................ BOd bj 0.1 ... _........
<br />(;1.......7). .
<br />
<br />"
<br />
<br />I J"rieUoII. Lowu m ColT..,.. MtkIl Pi"., by M. 1. Webster 8Pd L, R.
<br />Metealf..l.. Corps of EDllneen, Department of the Army; publiahed (0 1000nal
<br />of tbe tlydr&ol.lCl Dlvtalon PrOOeedlnp of the AmertcaD. Society 01 Civil
<br />EDKineers. Vol. $5, No, BY 9, September 1969, Paper No. 21e. pp. 36-67.
<br />4 For Important wort and where &CCl1I'&te determInation of water prolDe8
<br />.. neceaary, the desiper Is uraed to 00DSUlt the fOllowln& reCereoces and to
<br />aeleet It by comparison or tbe specific conditions wltb the cbannell tested:
<br />Flow 01 WlIlO' {#~ IrritJIOfI. lI114 SlmiW 01.'*', by P. C. Beobey. U.s.
<br />Depctment or A tore, Tecbnlca1 BulIe>tbl No. 6521.. February 1'31.
<br />F1tiw 01 W..",. in lri7Iaf, Clo,,1MII. by C, E. BamBer. \,I,S. Depwtment
<br />of A&rkultore. TeehnIcaJ Bulletin No. 129. November 1929.
<br />I Haadlloot of (;k"u Dm,ftIM Soil aDd WGkr ~lm. pre~d b:r
<br />the Stillwater Outdoor H:rdrBUlic: ~ in cooperation With the
<br />Oklahoma Agrieu1turatEl:perimeDt Station., publiShed oy the 8011 COD.-
<br />eervatloD Servtce...U,S, Department or AgrfcuIture, Pabl. No. SCS-TP.061,
<br />Marcb li67. rev. June 19M.
<br />. Flou of WatIr m CAo:"ndI Prt1t<<:tllf lJ, VIlPtatiItC! Li"'.. by W. O. Bee
<br />and v. J. Palmer, Divb10n or Dral.nap and Water Control, Re5er.rch, SOU
<br />CODlen'ation Service. U,S. Department of Agriculture, Tech, Bull. No. 961,
<br />...............
<br />, For cBIcu1attons of stage fit discbaqe in natlJ,tal stream cb&nnets, it it
<br />recommended that the desllDeI' consult the 1ocB1 District Ofllee or the
<br />8W'1aoe Water Bnncbofthe U.S. 0e0l0Iica1 Survey, to obtain data UlU'dlOC
<br />nlues or " applicable to streams of 8O.J' specJ.fI.c Ioeality. Where 'his pro-
<br />cedure is not followed, tbe ~ble may be used BS a guide, The values or
<br />. tabulated. baTe beeo der1ved from data reported by C. E. Ra.m88l' (lee
<br />footnote t) 8O.d from other Incomplete data.
<br />I The tentative vBlues of "cited sre principally derived from measurements
<br />made on faIrl:y short but strlUght reaches of nal;ural streams. Wbere l1o~
<br />calculated from dood elevations along a considerable 1etlltb of <;hanoel,
<br />invoJviDlIDe8llden IDd bend!t are to be UIed in velocitYealcula&:ioI1I by the
<br />Mannina lonnula, the vBlue OJ " must be intreMlld to provide for the addi.
<br />tIonalloa of enerJY cawed by beuds. The l.ncrea.ge may be in the ranp 01
<br />perbaps 3 to 15 ~nt.
<br />. The preaenoe offollap on trees and brush under flood stage will ms.terlally
<br />I1lereaae the value of 11. Therefore. roughness eoeftlcients for veptaUon In
<br />JMr will be larger ibID for bare branches. For trees in channels or on bants,
<br />IDd for bruah on banks where submergence 01 branches increases wltb deplb
<br />of flow. "wIlllDereue wltb r1sIna stage.
<br />
<br />Table 4.-Mulmum permJoslble velocities I. ehanels
<br />Uned wit. uniform stands or yarjous &ran coyers, well
<br />maintained I t
<br />
<br /> Manmum r.:
<br /> slbleveIoci :YOD-
<br /> e_ Slope ......
<br /> Erosion- E8II1.
<br /> resistant -
<br /> - ....
<br /> - I.p~, f.p..,
<br /> r~=l~.::~:= . .
<br />1Ierm_.....-__m_______________ , .
<br /> . .
<br />k't..u\!..~:::::::::::::::::::: Jr---hn-.- , a
<br />10......0.. . .
<br />Blue If&(Da.nnn~.. ...... ......~~.u.. Over 10..... a 3
<br />0ruI ~ure_. n~.n.... ..... ..._...n {....'___n.... . .
<br />lHO'_Uo.U. . 3
<br />$7~~:::====:::::::::::::: r.--hnn. 3.' ...
<br />"udzun.___......___m_______m __h_
<br />AIIaIIL_...._______.. ...__.m___h_____
<br />CrabBnlll_ _.n_n....n. ..0. ..un...._
<br />~~~~=::::::::::::::::::: Jo-o I....~.--- ... 2,$
<br />
<br />I Prom HlIftdbao.I: 0/ CJaa1uwl DaIp ftJr Soil.M W. C'on.HrJraticm. (See
<br />footnote a table 2.)
<br />I u. ~o"'" fl.p.., only whenliood ooven IUd proper maintenance
<br />CIlIl be obtained.
<br />. Do not use OIl IIopes steeper tbaD 10 Pf:RI8Dt.
<br />f U. on slopes steeper tbaD.' percent fa not recommended.
<br />I Annuall, 1iIed 011 mUd slopes or.. temporary protection. until peraaaDeat
<br />oovers are eltabliabed.
<br />
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