Laserfiche WebLink
<br />HYDRAULIC STRUCTURES <br /> <br />DRAINAGE CRITERIA MANUAL (V. 2) <br /> <br />2.7 <br />2.8 <br /> <br />2.6.2 Foundation/Seepage Control Systems .......................................................... HS-34 <br />Simplified Minimum Design Approach for Boatable Channels ................................... HS-36 <br />Construction Concerns: Grass-Lined Channels ........................................................ HS-37 <br />2.8.1 Foundation/Seepage Control......................................................................... HS-37 <br />2.8.2 Baffle Chute Construction ..............................................................................HS-38 <br />2.8.3 Vertical Hard Basin Construction ...................................................................HS-38 <br />2.8.4 Sloping Grouted Boulder Construction .........,................................................HS-38 <br />Low-Flow Check and Wetland Structures................................................................... HS-39 <br /> <br />2.9 <br /> <br />3.0 CONDUIT OUTLET STRUCTURES ........................................................................................ HS-61 <br /> <br />3.1 General....... ........................ ......... ............................................... .......... ....................... HS-61 <br />3.2 Impact Stilling Basin .............................................................................'...................... HS-61 <br />3.2.1 Low-flow Modifications ................................................................................... HS-62 <br />3.2.2 Multiple Conduit Installations ......................................................................... HS-63 <br />3.2.3 General Design Procedure ............................................................................ HS-63 <br />3.3 Pipe Outlet to Baffle Chute ......................................................................................... HS-64 <br />3.4 Low Tailwater Basins .................................................................................................. HS-65 <br />3.4.1 General .......................................................................................................... HS-65 <br />3.4.2 Objective......................... ......... ..... ..................... ........... ................................. HS-65 <br />3.4.3 Low Tailwater Basin Design................,.......................................................... HS-65 <br />3.4.3.1 Finding Flow Depth and Velocity of Storm Sewer <br />Pipe Outlets .................................................................................... HS-65 <br />3.4.3.2 Riprap Size ..................................................................................... HS-67 <br />3.4.3.3 Basin Length ................................................................................... HS-68 <br />3.4.3.4 Basin Width..... ....,......... ..... ............................ ................................. HS-69 <br />3.4.3.5 Other Design Requirements ........................................................... HS-69 <br />3.5 Culvert Outlets ........................................................................................,................... HS-69 <br /> <br />4.0 <br /> <br />BRIDGES .... ......... ...... ..... ,......... ...... .... ...... ... ..................... ..... ..... ...... ..... .... .... ............ ......... ..... HS-80 <br />4.1 Basic Criteria .....................................................................................................,......... HS-81 <br />4.1.1 Design Approach............................................................................................ HS-81 <br />4.1.2 Bridge Opening Freeboard ............................................................................ HS-81 <br />4.2 Hydraulic Analysis........................... ..... ......... ........... .......... ......................................... HS-81 <br />4.2.1 Expression for Backwater ....................................................,......................... HS-82 <br />4.2.2 Backwater Coefficient .......................,............................................................ HS-83 <br />4.2.3 Effect of M and Abutment Shape (Base Curves)......................................,.... HS-84 <br />4.2.4 Effect of Piers (Normal Crossings)................................................................. HS-84 <br />4.3 Design Procedure ....................................................................................................... HS-85 <br />4.4 Inadequate Openings................... ......... .................. ........... ..... ...... ......... ..................... HS-86 <br /> <br />5.0 TRANSITIONS AND CONSTRICTIONS ................................................................................. HS-90 <br />5.1 Introduction ................................................................................................................. HS-90 <br />5.2 Transition Analysis.......................................................... ..... ............... ................. ....... HS-90 <br />5.2.1 Subcritical Transitions .......................,............................................................ HS-90 <br />5.2.2 Supercritical Transition Analysis .................................................................... HS-91 <br />5.3 Constriction Analysis.............. ......... .............. ..... ................ .................... ..................... HS-91 <br />5.3.1 Constrictions With Upstream Subcritical Flow............................................... HS-91 <br />5.3.2 Constrictions With Upstream Supercritical Flow............................................ HS-92 <br /> <br />6.0 <br /> <br />HS-ii <br /> <br />BENDS AND CONFLUENCES ................................................................................................ HS-94 <br /> <br />6.1 Introduction............................. ........................................ ..... ............... ........................ HS-94 <br />6.2 Bends.... ....................."......................... ......................................... ............................, HS-94 <br />6.2.1 Subcritical Bends .......................................................... ........................ ...... HS-94 <br />6.2.2 Supercritical Bends ................................................................................. ....... HS-94 <br /> <br />06/2001 <br />Urban Drainage & Flood Control District <br /> <br />e <br /> <br />e <br /> <br />e <br />