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KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL <br />TABLE 3.5.2C "n" AND "k" VALUES USED IN TIME CALCULATIONS FOR HYDROGRAPHS <br />'n; Sl+col Flow Eouatlon Mam�ind f Valuef (Fd �M in�tlal ]00 tl d Imei) �.' <br />Sm001� fuddCef (COnC�01a. i3phall. flravel. d E3�a tpN pGCkeE SOi) 0.011 <br />Fanow GeICa a loosa wi sudacn (ro rnlCw� 0.05 <br />Cuitivaicd so+ wim residue cwar ( a<. a.x0 h/n) � 0.08 <br />CWIi:i1CC Sod wiih roSiEue CWB! ($� O.i011/�) _ �'�� <br />Snart pralr�e qmss aN lawm �'�S <br />Dense qrasses �'Z� <br />BermuCa qrass <br />0.�1 <br />Hanya (�umnq �'�� <br />WooCs or lorest wuh Iiq�t unOerGuth �'� <br />WoaCs of ICreit weh densa urderbrush �'� <br />•IAanninq values lor sneat Ilow oNy. Iran Overton anG MeaGows 1978 (Se� TR•55, t9B6) <br />'k' Values Used In Tnvel 7me/TG�e Of CA�ce�rt2tbn CalcWatloru <br />SAailovr ConCanlraleC Flow (Mer Ihe InM1W 70U fL M s�ee� flow. R� 0.1) M, <br />L Fcrest witn heavy grourd liner arW meaEows (n•0.10) � <br />2. Brushy qr0und wHh some tree5 (n • 0.06�) 5 <br />J. Fallcw ar minimum WWqe ttdWatbn (o �0.0+0) 0 <br />+. High �rzu (n . O.WS) 9 <br />5. Sncrt grau. pastura and �wna (n�0.0.10) �� <br />6. Nea�y Wre CmunO (n•0.025) �� <br />7. PaveE anE gravel areas (n•0.0�2) 27 <br />C4innnl Flow (Intcrminenil (At ina eoq�nnmp d vis�de channds: F•OY� <br />Fomslttf swale wnn �mW grourb Ilnar (n • 0.10) <br />FnrriM aminage cou�se,Ravine wan EafneC efunnN CeE (n •0.050) <br />Rxk.11ncU walerway (n-0.0J5) <br />Grasse0 walenvay (n•0.070) <br />EanMinoo waierviay (n.a a251 <br />CAIP pipe (n•0.021) <br />Contrele pi0e (O.Ot2) <br />C�nerwate�ways anC p�pes <br />Ct+annel Fipw (Cantinuous s�ream, R- 0.+) <br />9. bfeanCerinq stream wtln eome pods (n . 0.6W) <br />10. RockJlneC sUeam (n-0.0.75) <br />II. GrasaJineCstra�m(n•0.070) <br />t2. Otner ztreams, mammaCe clum+eis antl p�pe <br />^Seo Chapter 5, ia0�a S.J.fiC �or adaitic'ul b�aaNn9s'n'values Icr open ct+annHs <br />N� <br />5 <br />10 <br />15 <br />17 <br />20 <br />21 <br />Jt <br />0.508/n <br />k� <br />20 <br />Y] <br />27 <br />0.80�/n•• <br />3.5.2-7 1i90 /r <br />"f % <br />