Solutions_Manual_Urban_Drainage_2nded - Urban Drainage 2nd...

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1 Urban Drainage 2 nd edition SOLUTIONS MANUAL David Butler and John W Davies This solutions manual is made available free of charge. Details of the accompanying textbook Urban Drainage 2 nd edition (ISBN 0415-30606-X hbk; 0415-30607-8 pbk) are on the website of the publisher www.sponpress.com and can be ordered from Book.orders@tandf.co.uk or phone: +44 (0) 1264 343071 First published 2004 by Spon Press, an imprint of Taylor & Francis, 2 Park Square, Milton Park, Abingdon, Oxon OX14 4RN Simultaneously published in the USA and Canada by Taylor & Francis, 270 Madison Avenue, New York, NY 10016, USA @ 2004 David Butler and John W Davies All rights reserved. No part of this book may be reprinted or reproduced or utilized in any form or by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying and recording, or in any information storage or retrieval system, except for the downloading and printing of a single copy from the website of the publisher, without permission in writing from the publishers. Publisher's note This book has been produced from camera ready copy provided by the authors Contents of this solutions manual Chapter Page Number Chapter 3--------------------------------------------- 2 Chapter 5--------------------------------------------- 3 Chapter 6--------------------------------------------- 3 Chapter 7--------------------------------------------- 5 Chapter 8--------------------------------------------- 5 Chapter 9--------------------------------------------- 6 Chapter 10 ------------------------------------------- 7 Chapter 11 ------------------------------------------- 8 Chapter 12 ------------------------------------------10 Chapter 13 ------------------------------------------11 Chapter 14 ------------------------------------------12 Chapter 15 ------------------------------------------12 Chapter 16 ------------------------------------------13 Chapter 17 ------------------------------------------15 Chapter 18 ------------------------------------------16 Chapter 21 ------------------------------------------16 Chapter 23 ------------------------------------------16 Note: For chapters 1, 2, 4, 19, 20, 22 and 24 the problems are simply issues to think about. Solutions are only provided to problems with numerical solutions for these chapters and all others.
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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)
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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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Solutions_Manual_Urban_Drainage_2nded - Urban Drainage 2nd...

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