The Sewerage Engineers Note book Being Standard Notes On Sewer Formul And Se
The book The Sewerage Engineers Note book Being Standard Notes On Sewer Formul And Se was written by author Albert Wollheim Here you can read free online of The Sewerage Engineers Note book Being Standard Notes On Sewer Formul And Se book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Sewerage Engineers Note book Being Standard Notes On Sewer Formul And Se a good or bad book?
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A = area of drainage district in acres. In this formula Q increases with R, C and S, and diminishes as A increases ; but the formula takes no account of the shape of the watershed. It is, moreover, based on gaugings of comparatively small areas; hence, when applied to large areas it has generally proved unreliable. Hawkslry and JJazalgete adopted the following formula: 3 L g- A + Log. where D = diameter of circular sewer in inches, to carry off a rainfall of 1 in. Per hour. A = number of acres ...drained. N" = length of feet in which the sewer falls 1ft. This formula contains only two variables the area and the slope without taking account of any of the other functions entering into the problem, and, besides, only allows for a maximum rainfall of 1 in. Per hour. It is, therefore, not surprising that in a number of cases where sewers have been proportioned by this formula additional relief sewers have had to be constructed subsequently. Colonel Adams' formula, as simplified by Kuich- ling, reads : Q = 1-035 Ar */-* V A 2 r 2 where Q = maximum discharge of outlet sewer, cubic feet per second.
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