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<br />Table 14-1. Values of Runoff Coefficient C <br />TJlpe of dTai1UJ{)t area Runoff eoeJ/icienl. C <br />Lawns: <br />Sandy soil. llat, 2%.. .......... 0.05-0.10 <br />Sandy soil. average, 2-7%....... 0.10-0.15 <br />Sandy soil, steep, 7 %........ .... 0.15--0.20 <br />Heavy soil, fiat. 2%..... ......... 0.13-0.17 <br />Heavy soil, average, 2-7 %........ .O.lS-O.22 <br />Heavy soil. steeP. 7 %..... . ... . 0.25-0.35 <br />Business: <br />Downtown areas. <br />Neighborhood areas. <br />Residential: <br />Single-family areas.. ........... <br />Multi units, detached....... ... . <br />Multi units, attached............ <br />Suburban....... .. .. . . ...... <br />Apartment dwelling areas. .. . . . . <br />Industrial: <br />Light areas. <br />Heavy areas. . . . . . . . . . . . . <br />Parks. cemeteries..... <br />Playgrounds. . . . . . . . . . . . . . <br />Railroad yard areas. ..... ... . <br />unimproved areas... . . .. .... .. <br />Streets: <br />Asphaltic. . .. . . . ....... .. <br />Concrete.. .. . . ... ...... . <br />Brick... ........ ...... ... <br />Drives and walks.................. <br />Roors..... ... ...... ....... <br /> <br />RUNOFF <br /> <br />O. 7ll-O. 95 <br />0.5O-1l.70 <br /> <br />O. 3ll-O.60 <br />o .4ll-O.60 <br />O.6<Hl.75 <br />0.25-0.40 <br />0.5<Hl.70 <br /> <br />0.5<Hl.80 <br />O.6<Hl.OO <br />O.lll-O.25 <br />0.2ll-O.35 <br />o .2ll-O.4O <br />0.10-0.30 <br /> <br />0.70-0.95 <br />0.80-0.95 <br />0.7ll-O.85 <br />0.75-0.85 <br />0.75-0.95 <br /> <br />Ref: "Handbook of App lied Hydt-o logy" by <br />Ven Te Chow <br />