A developer has recently purchased a 7 mi area of land north of Houston. She is interested in determining the impact that development will have on the hydrologic response of the area. There is one main channel running through the area and the length along it from the outlet to the divide is 6 mi. The aver- age slope in this area is 100 ft/mi. To determine the comparison hydrographs, a storm with duration of 3 hr will be used. Pre-development, the area is 40% wooded (good condition), 30% good con- dition meadow, and 30% cultivated land with conservation treatment. Post- development, the watershed will be 10% wooded (good condition), 5% good condition meadow, 30% cultivated land with conservation treatment, 30% residential with an average lot size of 1/8 acre, and 25% commercial area. The area has 40% soil type A and 60% soil type C. Using the SCS method of unit hydrograph construction and Excel to aid in your calculations and graphing, plot the resulting triangular hydro- graphs on the same graph for comparison and note the differences in a few short sentences. How does development affect the hydrograph? What do the resulting hydrographs tell you about the effects of high or low curve numbers?

A developer has recently purchased a 7 mi area of land north of Houston. She is interested in determining the impact that development will have on the hydrologic response of the area. There is one main channel running through the area and the length along it from the outlet to the divide is 6 mi. The aver- age slope in this area is 100 ft/mi. To determine the comparison hydrographs, a storm with duration of 3 hr will be used. Pre-development, the area is 40% wooded (good condition), 30% good con- dition meadow, and 30% cultivated land with conservation treatment. Post- development, the watershed will be 10% wooded (good condition), 5% good condition meadow, 30% cultivated land with conservation treatment, 30% residential with an average lot size of 1/8 acre, and 25% commercial area. The area has 40% soil type A and 60% soil type C. Using the SCS method of unit hydrograph construction and Excel to aid in your calculations and graphing, plot the resulting triangular hydro- graphs on the same graph for comparison and note the differences in a few short sentences. How does development affect the hydrograph? What do the resulting hydrographs tell you about the effects of high or low curve numbers?

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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Concept explainers

Highway Drainage

Highway drainage is the process of extracting and regulating the excess surface water on the pavement by giving the desired slope. The construction of a highway drain helps to divert the water present on the surface, and sub-grade by the means of slope. Highway drainage systems are a necessary part of smooth functioning of traffic, since the highway drainage systems provide proper disposal of unwanted substances from the highways.

Question

A developer has recently purchased a 7 mi area of land north of Houston.
She is interested in determining the impact that development will have on the
hydrologic response of the area. There is one main channel running through
the area and the length along it from the outlet to the divide is 6 mi. The aver-
age slope in this area is 100 ft/mi. To determine the comparison hydrographs,
a storm with duration of 3 hr will be used.
Pre-development, the area is 40% wooded (good condition), 30% good con-
dition meadow, and 30% cultivated land with conservation treatment. Post-
development, the watershed will be 10% wooded (good condition), 5% good
condition meadow, 30% cultivated land with conservation treatment, 30%
residential with an average lot size of 1/8 acre, and 25% commercial area. The
area has 40% soil type A and 60% soil type C.
Using the SCS method of unit hydrograph construction and Excel to aid
in your calculations and graphing, plot the resulting triangular hydro-
graphs on the same graph for comparison and note the differences in a
few short sentences. How does development affect the hydrograph? What
do the resulting hydrographs tell you about the effects of high or low curve
numbers?

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