Question

A street has 1000m of length, longitudinal slope of 1%, cross-slope of 4% and n= 0.018. The street width is 20m and 6m must be kept clear at the design condition For each side of street, there are two gutters with interval distance as 500m Design these gutters to drain out a rainfall of 50mm during 2 hours if we assume that there is not any source of water flowing to the street?

Answer 1

Givem, Street 100 0 m Longitudional slape [s.]= 1/ Cro Spe O O4 Manning Conet n]= Street nidth or dlesign dear Width Average ain fal Trtemsity : 7 35 mm/hr

top width allowable the Tn the Street blocing is T slope смо the cu Maximum d T Sx (C)(o64 But Elecherge allowabl Maximum Per Mannin eaation *gu (0-2479(0.01) O' 31 (9.01( davelop Area Raquired The msec 161 is Rain tall oturaity /hr whure A loo0x 360о G. q44 x lb

A = 91 X L 7 L91 hength oadasy autr mikuting ocing betweon 500m contnikding to the the Gutter nichth under oad way

Gutter indivdual 2.35m INidth for an E : ennd ot the bottom is Connecteot Sewer Fipe Gutter 2- I67.27 X ID height Gutter the There 500 x 16. 7 Road leve oula Tnlet 83m