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~~ <br />~ - - <br />Table 2.25 Rctudance Coeffiuent. <br />0. senption of area Runoff coefficients <br />Business: <br />Downtown areas ............... .....................0.70 to 0.95 <br />Nclgllborllood areas . ............ .....................0.50 to 0.70 <br />Residential: <br />Single family areas .............. .....................0.30 to 0.50 <br />efulti•units, detached ............ .....................0.40 to 0.60 <br />Multi•units, attached ............ .....................0.60 l0 0.75 <br />Residential (suburban) • .............. .....................0.25 to 0.40 <br />Apanlncnt dwe0ing areas ..... ........ .....................0.50 to 0.70 <br />Industrial: <br />Light areas .................... .....................0.50 to 0.80 <br />Henry area ................... .....................0.60 to 0.90 <br />Parks, cemeteries .................... .....................0.10 l0 0.25 <br />Playgrounds ........................ .....................0.20 to 0.35 <br />Railroad yard areas .................. .....................0.20 to 0.35 <br />Unimproved areas ................... .....................0.10 to 0.30 <br />Streets: <br />Asplultic and concrete .......... .....................0.70 to 0.95 <br />8ric1 :........................ .....................0.70 to 0.85 <br />Roofs ............................ .....................O.75to 0.95 <br />I~wna; sandy soil: <br />'Flat, 2Se ...................... .....................0.05 to 0.10 <br />Average, 2% to ]% .............. .....................0.10 Io 0.15 <br />steep. 7n .................... .....................0.15 l0 0.20 .. <br />Lawns; henry soil: <br />Flat. 2% ...................... .....................0.13 to 0.17 <br />Average. 2% to 7% .............. .....................0.18 to 0.22 <br />Sleep,7% .........................................0.2510 0.35 <br />Rural Arcu <br />~ <br />topography <br />and <br />Vegetation <br /> <br /> <br />Den Sandy <br />Loam <br />Soil Texture <br /> <br />Clay anJ Silt <br />Lunn <br /> <br /> <br />igl,t <br />Clay <br />woodland <br />Flat 0•S%alope 0.10 0.30 0.40 <br />Rolling 5-10%slope 0.15 0.35 0.50 <br />Ililly 10.30%alope ~ 0.30 O.SO 0,60 <br />Panurc <br />i <br />Flat 0.10 0.30 0.40 <br />Rollins 0.16 0.36 O.SS <br />Ililly 0.22 0.42 0.60 <br />Cultivated <br />Flat 0.70 0.50 0.60 <br />Roll 0.40 0.60 0.70 <br />Surface c <br />Very smooth asphalt 0.007 <br />Tu and sand pavement 0.0073 <br />Crushed slate roofing paper O.p082 <br />Concrete 0.012 <br />Tu and gravel pavement 0.0017 <br />Closely clipped sod 0.046 <br />Dense bluegrals turf 0.060 <br />Table 2.20 Runoff Curve Numbers for Selected Agricultural, Suburban, and Urhan <br />land Use. (Antecedent Moisture Condition II). <br /> R ICROIALIC SOIL GPbI'P <br />loan Irsc orslalmoa <br />e <br />a <br />c <br />o <br />LLlal•tue lrnel/r rlaawt rennnrt ton arnteent T7 el 00 91 <br />. •ln eee..raaJen er.ra.rna 6a n le el <br />Pu twt er nnp lrna: -oar Icon la ten ee T9 ee e9 <br />aeee eene It ten ]9 ei 71 e0 <br />.rear.: aeee tonela toe !o )e Tl le <br />rooe sr rorrra ltne: tale tame, per cent, iw ea\<e \) 66 Tl e) <br />aooe eewrl/ a) Ss 10 lT <br />oR.n speru. L•nr. Pro, nett tear.... ptato bt, rlt. <br />aeN ew)1 UOw: arm emrr e. I)r er .err of Ur vu )9 e) 1\ De <br />hlr emelales aru• coot en Se[ is 1)f of oar tru \9 6b 19 e\ <br />ea_.rrs.t .ne aaa.r....rt. toss 1.9.r•Ina.) e9 9a 9t 9s <br />7Mrarlel elttrl ele 1727 leprrrlwrl. el ae rl 9, <br />hrl ernalt\:!/ <br />a•oMt let •Lt Noyt 1 Lpnleet=r <br />110 ten . Ittt es 71 es M 9a <br />\n .... se a is e) es <br />lrl .:r. sa sl la e) 6c <br />U: .en as )\ To eo es <br />1 tert h )I 6e 79 ea <br />h•re praly tear, rmrt, eel•tat-t, eae.!/ 90 ae se 9e <br />nr«ae w t.w: <br />pne su t..ee .wa ta.r.......r/ se 9e w <br />.r.•.\ la es u <br />~,,. <br />