Table 1 No Area Туре Path Length Slope |(acres) 1 24 Grass, Fair Condition AE (ft) (%) 1600 4 2 15 Rangeland - Natural BF 1490 3 3 16 Asphalt 4 12 Concrete DF 1250 2 CE 1280 2 EF 1300 1.5 FG 1510 1.5 An urban watershed in Jefferson County is shown in Figure 1 below, along with the travel paths from the most remote points in each subarea. The details of the subareas are given in Table 1 below. Determine the 50 year peak flow for the drainage outlet G. Use the IDF chart for Jefferson County that is shown below. Use the NRCS Method (TR55) to determine time of concentration and estimate runoff coefficients using Table 15.2.3 (provided in Lesson Notes). Figure 1 Table 1 No Area (acres) Туре Path Length Slope (ft) (%) 1 24 Grass, Fair Condition AE 1600 4 2 15 Rangeland - Natural BF 1490 3 B G

Table 1 No Area Туре Path Length Slope |(acres) 1 24 Grass, Fair Condition AE (ft) (%) 1600 4 2 15 Rangeland - Natural BF 1490 3 3 16 Asphalt 4 12 Concrete DF 1250 2 CE 1280 2 EF 1300 1.5 FG 1510 1.5 An urban watershed in Jefferson County is shown in Figure 1 below, along with the travel paths from the most remote points in each subarea. The details of the subareas are given in Table 1 below. Determine the 50 year peak flow for the drainage outlet G. Use the IDF chart for Jefferson County that is shown below. Use the NRCS Method (TR55) to determine time of concentration and estimate runoff coefficients using Table 15.2.3 (provided in Lesson Notes). Figure 1 Table 1 No Area (acres) Туре Path Length Slope (ft) (%) 1 24 Grass, Fair Condition AE 1600 4 2 15 Rangeland - Natural BF 1490 3 B G

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter16: Highway Drainage

Section: Chapter Questions

Problem 9P

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