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Problem 1 (Problem 15.2.1-Mays Textbook) Determine the pipe diameters for the storm sewer system in Figure P15.2.1a, which is located in Phoenix, Arizona. The rainfall-intensity-duration frequency relationship for the Phoenix metro area is given in Figure P15.2.1b. Characteristics of the catchments are listed in Table P15.2.1. Use a return period of two years (n = 0.014). Use the velocity criteria in Table 15.2.2 (below) to check the velocity in all the sewer pipes 1.1 200 m Table P15.2.1 Catchment Characteristics, Problem 15.2.1 2.1 150 m 1.2 150 m Ground elevation Area Runoff Inlet time 3.1 Catchment (m) (km²) coefficient (min) 1.1 300 0.01 0.60 1.2 298 0.008 0.75 20 2.1 296 0.005 0.80 15 2255 3.1 294.5 Velocity: Table 15.2.2 Technical Items and Limitations to Consider in Storm Sewer Design Minimum design velocity Maximum design velocity 2-3 ft/s (0.6-0.9 m/s) Rigid pipe Flexible pipe 15-21 ft/s (4.6-6.4 m/s) 10-15 ft/s (3.0-4.6 m/s) 5 min 10 15 20 30 10 100 200 300 500 1000 min 543 2 1.0 10 10 yr 5 yr Rainfall intensity (inch/hr) 543 .2 2 yr 100 yr 50 yr 25 yr 58 .05 .04 5 min 10 15 20 30 100 200 300 500 1000 min 1 hr 2 3 6 12 24 hr Duration (b)

Problem 1 (Problem 15.2.1-Mays Textbook) Determine the pipe diameters for the storm sewer system in Figure P15.2.1a, which is located in Phoenix, Arizona. The rainfall-intensity-duration frequency relationship for the Phoenix metro area is given in Figure P15.2.1b. Characteristics of the catchments are listed in Table P15.2.1. Use a return period of two years (n = 0.014). Use the velocity criteria in Table 15.2.2 (below) to check the velocity in all the sewer pipes 1.1 200 m Table P15.2.1 Catchment Characteristics, Problem 15.2.1 2.1 150 m 1.2 150 m Ground elevation Area Runoff Inlet time 3.1 Catchment (m) (km²) coefficient (min) 1.1 300 0.01 0.60 1.2 298 0.008 0.75 20 2.1 296 0.005 0.80 15 2255 3.1 294.5 Velocity: Table 15.2.2 Technical Items and Limitations to Consider in Storm Sewer Design Minimum design velocity Maximum design velocity 2-3 ft/s (0.6-0.9 m/s) Rigid pipe Flexible pipe 15-21 ft/s (4.6-6.4 m/s) 10-15 ft/s (3.0-4.6 m/s) 5 min 10 15 20 30 10 100 200 300 500 1000 min 543 2 1.0 10 10 yr 5 yr Rainfall intensity (inch/hr) 543 .2 2 yr 100 yr 50 yr 25 yr 58 .05 .04 5 min 10 15 20 30 100 200 300 500 1000 min 1 hr 2 3 6 12 24 hr Duration (b)

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Problem 1 (Problem 15.2.1-Mays Textbook) Determine the pipe diameters for the storm sewer system in Figure P15.2.1a, which is located in Phoenix, Arizona. The rainfall-intensity-duration frequency relationship for the Phoenix metro area is given in Figure P15.2.1b. Characteristics of the catchments are listed in Table P15.2.1. Use a return period of two years (n = 0.014). Use the velocity criteria in Table 15.2.2 (below) to check the velocity in all the sewer pipes 1.1 200 m Table P15.2.1 Catchment Characteristics, Problem 15.2.1 2.1 150 m 1.2 150 m Ground elevation Area Runoff Inlet time 3.1 Catchment (m) (km²) coefficient (min) 1.1 300 0.01 0.60 1.2 298 0.008 0.75 20 2.1 296 0.005 0.80 15 2255 3.1 294.5 Velocity: Table 15.2.2 Technical Items and Limitations to Consider in Storm Sewer Design Minimum design velocity Maximum design velocity 2-3 ft/s (0.6-0.9 m/s) Rigid pipe Flexible pipe 15-21 ft/s (4.6-6.4 m/s) 10-15 ft/s (3.0-4.6 m/s)
Transcribed Image Text:Problem 1 (Problem 15.2.1-Mays Textbook) Determine the pipe diameters for the storm sewer system in Figure P15.2.1a, which is located in Phoenix, Arizona. The rainfall-intensity-duration frequency relationship for the Phoenix metro area is given in Figure P15.2.1b. Characteristics of the catchments are listed in Table P15.2.1. Use a return period of two years (n = 0.014). Use the velocity criteria in Table 15.2.2 (below) to check the velocity in all the sewer pipes 1.1 200 m Table P15.2.1 Catchment Characteristics, Problem 15.2.1 2.1 150 m 1.2 150 m Ground elevation Area Runoff Inlet time 3.1 Catchment (m) (km²) coefficient (min) 1.1 300 0.01 0.60 1.2 298 0.008 0.75 20 2.1 296 0.005 0.80 15 2255 3.1 294.5 Velocity: Table 15.2.2 Technical Items and Limitations to Consider in Storm Sewer Design Minimum design velocity Maximum design velocity 2-3 ft/s (0.6-0.9 m/s) Rigid pipe Flexible pipe 15-21 ft/s (4.6-6.4 m/s) 10-15 ft/s (3.0-4.6 m/s)
5 min 10 15 20 30 10 100 200 300 500 1000 min 543 2 1.0 10 10 yr 5 yr Rainfall intensity (inch/hr) 543 .2 2 yr 100 yr 50 yr 25 yr 58 .05 .04 5 min 10 15 20 30 100 200 300 500 1000 min 1 hr 2 3 6 12 24 hr Duration (b)
Transcribed Image Text:5 min 10 15 20 30 10 100 200 300 500 1000 min 543 2 1.0 10 10 yr 5 yr Rainfall intensity (inch/hr) 543 .2 2 yr 100 yr 50 yr 25 yr 58 .05 .04 5 min 10 15 20 30 100 200 300 500 1000 min 1 hr 2 3 6 12 24 hr Duration (b)
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