1986-10-07_PERMIT FILE - C1981008A

• Permit No: C1981008A
• IBM Index Class Name: PERMIT FILE
• Doc Date: 10/7/1986
• Doc Name: Dodson & Associates Hydraulic Programs TRAP PIPE
• Section_Exhibit Name: Tab 13 Attachment J
• Media Type: D
• Archive: Yes

TABLE OF CONTENTS
3.4.5.2 Outlet Control Headwater . . . . . . . . . . . . . . . 51
3.4.5.3 Normal Depth of Flow in the Culvert . . . . . . . . . . 52
3.4.5.4 Critical Depth of Flow in the Culvert . . . . . . . . . 52
3.4.5.5 Depth of Flow at Culvert Outlet . . . . . . . . . . . . 52
3.4.5.6 Culvert Outlet Velocity . . . . . . . . . . . . . . . . 52
3.4.5.7 Printing Reports and Graphs . . . . . . . . . . . . . . 53
3.4.6 Examples of Performance Curve Procedure . . . . . . . . . . 53
3.4.6.1 Example of Pipe Culvert Analysis . . . . . . . . . . . 53
3.4.6.1.1 Description of Example for Pine Culvert . . . . . 53
3.4.6.1.2 Example Screen Display for Pipe Culvert . . . . . 53
3.4.6.1.3 Solution of Example for Pipe Culvert . . . . . . . 53
3.4.6.2 Example of Pipe Culvert Performance Curve . . . . . . . 54
3.4.6.2.1 Description of Example for Pipe Culvert . . . . . 54
3.4.6.2.2 Example Screen Display for Pipe Culvert . . . . . 54
3.4.6.2.3 Solution of Example for Pipe Culvert . . . . . . . 55
3.4.6.2.4 Example Graph of Performance Curve . . . . . . . . 55
3.4.6.3 Example of Box Culvert Analysis . . . . . . . . . . . . 56
3.4.6.3.1 Description of Example for Box Culvert . . . . . . 56
3.4.6.3.2 Solution of Example for Box Culvert . . . . . . . 56
3.4.6.3.3 Example Screen Display for Box Culvert . . . . . . 56
3.4.6.4 Example of Box Culvert Performance Curve . . . . . . . 57
3.4.6.4.1 Description of Example for Box Culvert . . . . . . 57
3.4.6.4.2 Solution of Example for Box Culvert . . . . . . . 57
3.4.6.4.3 Example Screen Display for Box Channel . . . . . . 57
3.4.6.4.4 Example Graph of Performance Curve for Box Culvert 58
4 DETENTION BASIN SIZING . . . . . . . . . . . . . . . . . . . . . . . . 59
4.1 PURPOSE OF THE PROGRAM . . . . . . . . . . . . . . . . . . . . . 59
4.2 DETENTION SIZING PROCEDURE' 59
4.2.1 Illustration of Assumed Basin Shape . . . . . . . . . . . . 59
4.2.2 Purpose of Detention Sizing Procedure . . . . . . . . . . . 60
4.2.3 "Detention" versus "Retention" . . . . . . . . . . . . . . . 60
4.2.4 Limitations of this Procedure . . . . . . . . . . . . . . . 60
4.2.5 Required Input Data for Detention Sizing Procedure . . . . . 60
4.2.5.1 Getting Help During Data Entry . . . . . . . . . . . . 60
4.2.5.2 Detention Basin Drainage Area . . . . . . . . . . . . . 61
4.2.5.3 Peak Inflow Rate Into Basin . . . . . . . . . . . . . . 61
4.2.5.4 Peak Release Rate From Basin . . . . . . . . . . . . . 61
4.2.5.5 Total Inflow Volume Into Basin . . . . . . . . . . . . 61
4.2.5.6 Available Storage Depth of Basin . . . . . . . . . . . 61
4.2.5.7 Required Freeboard in Basin . . . . . . . . . . . . . . 62
4.2.5.8 Side Slopes of Basin . . . . . . . . . . . . . . . . . 62
4.2.5.9 Width of Maintenance Berm . . 62
4.2.6 Description of Results of Detention Sizing Procedure . . . . 63
4.2.6.1 Required Detention Volume . . . . . . . . . . . . . . . 63
4.2.6.1.1 Assumed Hydrograph Shapes . . . . . . . . . . . . 63
4.2.6.1.2 Illustration of "Maximum" Detention Volume . . . . 63
4.2.6.1.3 "Maximum" Detention Volume . . . . . . . . . . . . 63
4.2.6.1.4 Illustration of "Minimum" Detention Volume . . . . 64
4.2.6.1.5 "Minimum" Detention Volume . . . . . . . . . . . . 64
4.2.6.1.6 "Normal" Detention Volume . . . . . . . . . . . . 64
4.2.6.2 Detention Volume Per Acre . . . . . . . . . . . . . . . 65
4.2.6.3 Basin Surface Area without Maintenance Berm . . . . . . 65
4.2.6.4 Basin Surface Area with Maintenance Berm . . . . . . . 65
DODSON & ASSOCIATES, INC. THE DODSON HYDRAULICS LIBRARY