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<br /> FLOODPLAIN MODELING<br /> USING HEC-RAS<br /> FirstEdition<br /> Authors<br /> Bentley Systems<br /> Gary Dyhouse<br /> Jennifer Hatchett<br /> Jeremy Benn<br /> Managing Editor<br /> Colleen Totz<br /> Editors<br /> David Klotz, Adam Strafaci,<br /> Annaleis Hogan, and Kristen Dietrich<br /> Contributing Authors<br /> David Ford Consulting,<br /> Houjong Rhee<br /> Exton, Pennsylvania USA<br /> FLOODPLAIN MODELING USING HEC-RAS<br /> First Edition<br /> Copyright © 2007 by Bentley Institute Press<br /> Bentley Systems, Incorporated.<br /> 685 Stockton Drive<br /> Exton, Pennsylvania 19341<br /> www.bentley.com<br /> Copyright © 2003 by Haestad Press<br /> Haestad Methods, Incorporated<br /> 27 Siemon Company Drive, Suite 200W<br /> Watertown, Connecticut 06795<br /> All rights reserved. Printed in the United States of America. No part of this publication may be reproduced, stored in a r<a title="floodplain free preview.pdf page 1" href="http://viewer.zmags.com/publication/52b2eae8?page=1"> FLOODPLAIN MODELING USING HEC-</a> <a title="floodplain free preview.pdf page 2" href="http://viewer.zmags.com/publication/52b2eae8?page=2"> FLOODPLAIN MODELING USING HEC-RAS First Edition C</a> <a title="floodplain free preview.pdf page 3" href="http://viewer.zmags.com/publication/52b2eae8?page=3"> “An ounce of action is worth a ton of theory.” -</a> <a title="floodplain free preview.pdf page 4" href="http://viewer.zmags.com/publication/52b2eae8?page=4"> </a> <a title="floodplain free preview.pdf page 5" href="http://viewer.zmags.com/publication/52b2eae8?page=5"> This book reflects my four decades of experi- enc</a> <a title="floodplain free preview.pdf page 6" href="http://viewer.zmags.com/publication/52b2eae8?page=6"> </a> <a title="floodplain free preview.pdf page 7" href="http://viewer.zmags.com/publication/52b2eae8?page=7"> “The consulting engineering community and governm</a> <a title="floodplain free preview.pdf page 8" href="http://viewer.zmags.com/publication/52b2eae8?page=8"> </a> <a title="floodplain free preview.pdf page 9" href="http://viewer.zmags.com/publication/52b2eae8?page=9"> Acknowledgments Floodplain Modeling Usin</a> <a title="floodplain free preview.pdf page 10" href="http://viewer.zmags.com/publication/52b2eae8?page=10"> The illustrations and graphs throughout the book </a> <a title="floodplain free preview.pdf page 11" href="http://viewer.zmags.com/publication/52b2eae8?page=11"> Authors and Contributing Authors Bentley Syst</a> <a title="floodplain free preview.pdf page 12" href="http://viewer.zmags.com/publication/52b2eae8?page=12"> including videos prepared by the PBS Nova series </a> <a title="floodplain free preview.pdf page 13" href="http://viewer.zmags.com/publication/52b2eae8?page=13"> Jeremy Benn, CEng, FICE, FCIWEM Jeremy Benn is a</a> <a title="floodplain free preview.pdf page 14" href="http://viewer.zmags.com/publication/52b2eae8?page=14"> </a> <a title="floodplain free preview.pdf page 15" href="http://viewer.zmags.com/publication/52b2eae8?page=15"> Foreword My first exposure to an instruc</a> <a title="floodplain free preview.pdf page 16" href="http://viewer.zmags.com/publication/52b2eae8?page=16"> notoriously lacking) of commanding the interest o</a> <a title="floodplain free preview.pdf page 17" href="http://viewer.zmags.com/publication/52b2eae8?page=17"> Table of Contents Preface </a> <a title="floodplain free preview.pdf page 18" href="http://viewer.zmags.com/publication/52b2eae8?page=18"> ii Table of Contents 2.3 Fundame</a> <a title="floodplain free preview.pdf page 19" href="http://viewer.zmags.com/publication/52b2eae8?page=19"> iii 3.8 Physical Models </a> <a title="floodplain free preview.pdf page 20" href="http://viewer.zmags.com/publication/52b2eae8?page=20"> iv Table of Contents Regional Analys</a> <a title="floodplain free preview.pdf page 21" href="http://viewer.zmags.com/publication/52b2eae8?page=21"> v Parallel Bridges .........................</a> <a title="floodplain free preview.pdf page 22" href="http://viewer.zmags.com/publication/52b2eae8?page=22"> vi Table of Contents Chapter 8 </a> <a title="floodplain free preview.pdf page 23" href="http://viewer.zmags.com/publication/52b2eae8?page=23"> vii 9.3 Publications Used in the NFIP </a> <a title="floodplain free preview.pdf page 24" href="http://viewer.zmags.com/publication/52b2eae8?page=24"> viii Table of Contents Guidance for </a> <a title="floodplain free preview.pdf page 25" href="http://viewer.zmags.com/publication/52b2eae8?page=25"> ix Channel Transitions ......................</a> <a title="floodplain free preview.pdf page 26" href="http://viewer.zmags.com/publication/52b2eae8?page=26"> x Table of Contents 12.4 Inline </a> <a title="floodplain free preview.pdf page 27" href="http://viewer.zmags.com/publication/52b2eae8?page=27"> xi 13.5 Computing Scour with HEC-RAS </a> <a title="floodplain free preview.pdf page 28" href="http://viewer.zmags.com/publication/52b2eae8?page=28"> xii Table of Contents Chapter 15 </a> <a title="floodplain free preview.pdf page 29" href="http://viewer.zmags.com/publication/52b2eae8?page=29"> Preface As evidenced by the development o</a> <a title="floodplain free preview.pdf page 30" href="http://viewer.zmags.com/publication/52b2eae8?page=30"> xiv Preface Overview Each chapter i</a> <a title="floodplain free preview.pdf page 31" href="http://viewer.zmags.com/publication/52b2eae8?page=31"> xv way overtopping. It outlines procedures fo</a> <a title="floodplain free preview.pdf page 32" href="http://viewer.zmags.com/publication/52b2eae8?page=32"> xvi Preface reader insights into the</a> <a title="floodplain free preview.pdf page 33" href="http://viewer.zmags.com/publication/52b2eae8?page=33"> xvii book contains a full version of HEC-Pack</a> <a title="floodplain free preview.pdf page 34" href="http://viewer.zmags.com/publication/52b2eae8?page=34"> </a> <a title="floodplain free preview.pdf page 35" href="http://viewer.zmags.com/publication/52b2eae8?page=35"> About the Software The CD in the back of </a> <a title="floodplain free preview.pdf page 36" href="http://viewer.zmags.com/publication/52b2eae8?page=36"> xx About the Software · Conduct </a> <a title="floodplain free preview.pdf page 37" href="http://viewer.zmags.com/publication/52b2eae8?page=37"> xxii · Work with hydrographs on-screen, pri</a> <a title="floodplain free preview.pdf page 38" href="http://viewer.zmags.com/publication/52b2eae8?page=38"> </a> <a title="floodplain free preview.pdf page 39" href="http://viewer.zmags.com/publication/52b2eae8?page=39"> CHAPTER 1 Introduction to Floodplain Modeling a</a> <a title="floodplain free preview.pdf page 40" href="http://viewer.zmags.com/publication/52b2eae8?page=40"> 2 </a> <a title="floodplain free preview.pdf page 41" href="http://viewer.zmags.com/publication/52b2eae8?page=41"> Section 1.1 </a> <a title="floodplain free preview.pdf page 42" href="http://viewer.zmags.com/publication/52b2eae8?page=42"> 4 </a> <a title="floodplain free preview.pdf page 43" href="http://viewer.zmags.com/publication/52b2eae8?page=43"> Section 1.1 </a> <a title="floodplain free preview.pdf page 44" href="http://viewer.zmags.com/publication/52b2eae8?page=44"> 6 </a> <a title="floodplain free preview.pdf page 45" href="http://viewer.zmags.com/publication/52b2eae8?page=45"> Section 1.3 </a> <a title="floodplain free preview.pdf page 46" href="http://viewer.zmags.com/publication/52b2eae8?page=46"> 8 </a> <a title="floodplain free preview.pdf page 47" href="http://viewer.zmags.com/publication/52b2eae8?page=47"> Section 1.3 </a> <a title="floodplain free preview.pdf page 48" href="http://viewer.zmags.com/publication/52b2eae8?page=48"> 10 </a> <a title="floodplain free preview.pdf page 49" href="http://viewer.zmags.com/publication/52b2eae8?page=49"> Section 1.4 </a> <a title="floodplain free preview.pdf page 50" href="http://viewer.zmags.com/publication/52b2eae8?page=50"> </a> <a title="floodplain free preview.pdf page 51" href="http://viewer.zmags.com/publication/52b2eae8?page=51"> CHAPTER 2 Introduction to Open Channel Hydrauli</a> <a title="floodplain free preview.pdf page 52" href="http://viewer.zmags.com/publication/52b2eae8?page=52"> 14 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 53" href="http://viewer.zmags.com/publication/52b2eae8?page=53"> Section 2.1 </a> <a title="floodplain free preview.pdf page 54" href="http://viewer.zmags.com/publication/52b2eae8?page=54"> 16 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 55" href="http://viewer.zmags.com/publication/52b2eae8?page=55"> Section 2.1 </a> <a title="floodplain free preview.pdf page 56" href="http://viewer.zmags.com/publication/52b2eae8?page=56"> 18 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 57" href="http://viewer.zmags.com/publication/52b2eae8?page=57"> Section 2.1 </a> <a title="floodplain free preview.pdf page 58" href="http://viewer.zmags.com/publication/52b2eae8?page=58"> 20 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 59" href="http://viewer.zmags.com/publication/52b2eae8?page=59"> Section 2.1 </a> <a title="floodplain free preview.pdf page 60" href="http://viewer.zmags.com/publication/52b2eae8?page=60"> 22 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 61" href="http://viewer.zmags.com/publication/52b2eae8?page=61"> Section 2.2 </a> <a title="floodplain free preview.pdf page 62" href="http://viewer.zmags.com/publication/52b2eae8?page=62"> 24 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 63" href="http://viewer.zmags.com/publication/52b2eae8?page=63"> Section 2.2 </a> <a title="floodplain free preview.pdf page 64" href="http://viewer.zmags.com/publication/52b2eae8?page=64"> 26 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 65" href="http://viewer.zmags.com/publication/52b2eae8?page=65"> Section 2.2 </a> <a title="floodplain free preview.pdf page 66" href="http://viewer.zmags.com/publication/52b2eae8?page=66"> 28 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 67" href="http://viewer.zmags.com/publication/52b2eae8?page=67"> Section 2.3 </a> <a title="floodplain free preview.pdf page 68" href="http://viewer.zmags.com/publication/52b2eae8?page=68"> 30 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 69" href="http://viewer.zmags.com/publication/52b2eae8?page=69"> Section 2.3 </a> <a title="floodplain free preview.pdf page 70" href="http://viewer.zmags.com/publication/52b2eae8?page=70"> 32 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 71" href="http://viewer.zmags.com/publication/52b2eae8?page=71"> Section 2.3 </a> <a title="floodplain free preview.pdf page 72" href="http://viewer.zmags.com/publication/52b2eae8?page=72"> 34 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 73" href="http://viewer.zmags.com/publication/52b2eae8?page=73"> Section 2.3 </a> <a title="floodplain free preview.pdf page 74" href="http://viewer.zmags.com/publication/52b2eae8?page=74"> 36 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 75" href="http://viewer.zmags.com/publication/52b2eae8?page=75"> Section 2.4 </a> <a title="floodplain free preview.pdf page 76" href="http://viewer.zmags.com/publication/52b2eae8?page=76"> 38 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 77" href="http://viewer.zmags.com/publication/52b2eae8?page=77"> Section 2.4 </a> <a title="floodplain free preview.pdf page 78" href="http://viewer.zmags.com/publication/52b2eae8?page=78"> 40 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 79" href="http://viewer.zmags.com/publication/52b2eae8?page=79"> Section 2.4 </a> <a title="floodplain free preview.pdf page 80" href="http://viewer.zmags.com/publication/52b2eae8?page=80"> 42 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 81" href="http://viewer.zmags.com/publication/52b2eae8?page=81"> Section 2.4 </a> <a title="floodplain free preview.pdf page 82" href="http://viewer.zmags.com/publication/52b2eae8?page=82"> 44 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 83" href="http://viewer.zmags.com/publication/52b2eae8?page=83"> Section 2.5 </a> <a title="floodplain free preview.pdf page 84" href="http://viewer.zmags.com/publication/52b2eae8?page=84"> 46 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 85" href="http://viewer.zmags.com/publication/52b2eae8?page=85"> Section 2.5 </a> <a title="floodplain free preview.pdf page 86" href="http://viewer.zmags.com/publication/52b2eae8?page=86"> 48 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 87" href="http://viewer.zmags.com/publication/52b2eae8?page=87"> Section 2.5 </a> <a title="floodplain free preview.pdf page 88" href="http://viewer.zmags.com/publication/52b2eae8?page=88"> 50 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 89" href="http://viewer.zmags.com/publication/52b2eae8?page=89"> Section 2.5 </a> <a title="floodplain free preview.pdf page 90" href="http://viewer.zmags.com/publication/52b2eae8?page=90"> 52 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 91" href="http://viewer.zmags.com/publication/52b2eae8?page=91"> Section 2.6 </a> <a title="floodplain free preview.pdf page 92" href="http://viewer.zmags.com/publication/52b2eae8?page=92"> 54 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 93" href="http://viewer.zmags.com/publication/52b2eae8?page=93"> Section 2.6 </a> <a title="floodplain free preview.pdf page 94" href="http://viewer.zmags.com/publication/52b2eae8?page=94"> 56 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 95" href="http://viewer.zmags.com/publication/52b2eae8?page=95"> Section 2.6 </a> <a title="floodplain free preview.pdf page 96" href="http://viewer.zmags.com/publication/52b2eae8?page=96"> 58 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 97" href="http://viewer.zmags.com/publication/52b2eae8?page=97"> Section 2.6 </a> <a title="floodplain free preview.pdf page 98" href="http://viewer.zmags.com/publication/52b2eae8?page=98"> 60 Introduction to Open Channel Hydraulics (</a> <a title="floodplain free preview.pdf page 99" href="http://viewer.zmags.com/publication/52b2eae8?page=99"> Section 2.6 </a> <a title="floodplain free preview.pdf page 100" href="http://viewer.zmags.com/publication/52b2eae8?page=100"> 62 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 101" href="http://viewer.zmags.com/publication/52b2eae8?page=101"> Section 2.6 </a> <a title="floodplain free preview.pdf page 102" href="http://viewer.zmags.com/publication/52b2eae8?page=102"> 64 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 103" href="http://viewer.zmags.com/publication/52b2eae8?page=103"> Section 2.6 </a> <a title="floodplain free preview.pdf page 104" href="http://viewer.zmags.com/publication/52b2eae8?page=104"> 66 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 105" href="http://viewer.zmags.com/publication/52b2eae8?page=105"> Section 2.6 </a> <a title="floodplain free preview.pdf page 106" href="http://viewer.zmags.com/publication/52b2eae8?page=106"> 68 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 107" href="http://viewer.zmags.com/publication/52b2eae8?page=107"> Section 2.7 </a> <a title="floodplain free preview.pdf page 108" href="http://viewer.zmags.com/publication/52b2eae8?page=108"> 70 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 109" href="http://viewer.zmags.com/publication/52b2eae8?page=109"> Problems 71 2.4 </a> <a title="floodplain free preview.pdf page 110" href="http://viewer.zmags.com/publication/52b2eae8?page=110"> 72 Introduction to Open Channel Hydraulics </a> <a title="floodplain free preview.pdf page 111" href="http://viewer.zmags.com/publication/52b2eae8?page=111"> Problems 73 2.7 English Units – Using t</a> <a title="floodplain free preview.pdf page 112" href="http://viewer.zmags.com/publication/52b2eae8?page=112"> </a>