Solutions_Manual_Urban_Drainage_2nded

# Solutions_Manual_Urban_Drainage_2nded - Urban Drainage 2nd...

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2 CHAPTER 3 3.1 Volumetric concentration, C v = V s /V , where V s is volume of solid and V is sample volume. So: 3 3 6 / 10 20 20 m m ppm V V C s v × = = = Density of solid, ρ = M/V , where M is its mass and = 2650 kg/m 3 . So: l mg m kg C V M C v / 53 / 10 20 2650 3 6 = × × = = = 3.2 Time (hrs) Flow (l/s) COD (mg/l) COD (mg/s) 0.5 80 50 4000 1 170 160 27200 1.5 320 380 121600 2 610 400 244000 2.5 670 230 154100 3 590 130 76700 3.5 380 70 26600 4 220 40 8800 4.5 100 20 2000 5 50 0 0 Sum 3190 665000 Av 319 148 From equation 3.1: l mg Q QC C av av / 208 3190 665000 = = Σ = 0 100 200 300 400 500 600 700 800 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Time (hrs) Flow (l/s) or COD (mg/l) Flow (l/s) COD (mg/l)
3 3.3 Gram atomic weight of N is 14.0 g gram atomic weight of H is 1.0 g gram molecular weight of ammonium is 14 + (4 × 1) = 18 g From equation 3.2: l N mgNH l mgNH / 27 18 14 35 / 35 4 4 = × = + + So, total N conc = 15 + 27 = 42 mgN / l 3.12 Taken over a 10-year period, there were 11 violations, whereas only up to 10 are permitted, so this water is not in compliance with the standard. CHAPTER 5 Ministry of health (equation 5.2): h mm b D a i / 0 . 20 20 30 1000 = + = + = Bilham (5.3): h mm D I i mm I I I N / 2 . 18 5 . 0 1 . 9 1 . 9 ) 1 . 0 4 . 25 / ( 5 . 0 25 . 1 10 ) 1 . 0 4 . 25 / ( 25 . 1 55 . 3 55 . 3 = = = = + × × = = + = Holland (5.4) h mm i mm I I I D N / 6 . 19 8 . 9 ) 4 . 25 / ( 5 . 0 10 ) 4 . 25 / ( 14 . 3 14 . 3 = = × = = = CHAPTER 6 6.4 From equation 6.2: t t t k c o c t e f e f f f f + = + = 9 1 ) ( 2 Time (min) 0-10 20 30 40 Time (hour) 0.167 0.333 0.500 0.667 f t (mm/h) calc 8.6 7.4 6.5 5.6 f t (mm/h) appl 8.6 7.4 6.5 Net rain (mm/h) 0 9 18 6 Eff rain (mm/h) 0 0.4 10.6 0

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4 Assumes Horton infiltration starts when net rain begins.
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## This note was uploaded on 10/07/2010 for the course ELECTRICAL eem701 taught by Professor Saini during the Spring '10 term at Indian Institute of Technology, Delhi.

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Solutions_Manual_Urban_Drainage_2nded - Urban Drainage 2nd...

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