12. A new urban development is to be constructed near Pinetown KZN (coastal region), which has...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
12. A new urban development is to be constructed near Pinetown KZN (coastal region), which has a mean annual rainfall (MAP) of 1000 mm. This development lies within the catchment of a small stream that is 4.0 km long. The flow characteristics of this catchment are that over the first 500 m of the catchment, runoff flow can be considered as overland flow (grassveld with medium grass) at a slope of 4.5 %. In the next stage, runoff flows in a small natural channel that is 1500 m long with a slope of 2.5 %, and the final stage to the outlet is a concrete-lined channel Page 8 TRANSPORTATION ENGINEERING 2A TRACIA2 laid to a slope of 1.5 % over the remainder of its length. The area of the catchment has been measured as 6.5 km?. The development is made up of 15 % asphaltic streets, 32 % downtown shopping malls, 38 % single-family residential and the remainder as parkland, which may be considered for runoff purposes as lawns with sandy soil - steep >7 %. Analyse this catchment for a 50-year return period storm. 12.1. Calculate the runoff coefficient currently prevailing in the catchment 12.2. Calculate the total time of concentration associated with the flow condition in the catchment 12.3. Calculate the rainfall intensity time of concentration 12.4. Calculate the peak discharge for a 10-year return period storm 12. A new urban development is to be constructed near Pinetown KZN (coastal region), which has a mean annual rainfall (MAP) of 1000 mm. This development lies within the catchment of a small stream that is 4.0 km long. The flow characteristics of this catchment are that over the first 500 m of the catchment, runoff flow can be considered as overland flow (grassveld with medium grass) at a slope of 4.5 %. In the next stage, runoff flows in a small natural channel that is 1500 m long with a slope of 2.5 %, and the final stage to the outlet is a concrete-lined channel Page 8 TRANSPORTATION ENGINEERING 2A TRACIA2 laid to a slope of 1.5 % over the remainder of its length. The area of the catchment has been measured as 6.5 km?. The development is made up of 15 % asphaltic streets, 32 % downtown shopping malls, 38 % single-family residential and the remainder as parkland, which may be considered for runoff purposes as lawns with sandy soil - steep >7 %. Analyse this catchment for a 50-year return period storm. 12.1. Calculate the runoff coefficient currently prevailing in the catchment 12.2. Calculate the total time of concentration associated with the flow condition in the catchment 12.3. Calculate the rainfall intensity time of concentration 12.4. Calculate the peak discharge for a 10-year return period storm
Expert Answer:
Answer rating: 100% (QA)
Solution Rainfall coefficients for different areas are given below Residential single family areas 0... View the full answer
Related Book For
Principles of Foundation Engineering
ISBN: 9781337705028
9th edition
Authors: Braja M. Das, Nagaratnam Sivakugan
Posted Date:
Students also viewed these civil engineering questions
-
A box with an open top is to be constructed from a rectangular piece of cardboard with dimensions 12 in. by 20 in. by cutting out equal squares of side at each corner and then folding up the sides as...
-
A box with an open top is to be constructed from a rectangular piece of cardboard with dimensions 12 in. by 20 in. by cutting out equal squares of side at each corner and then folding up the sides as...
-
A wall 2 cm thick is to be constructed from material that has an average thermal conductivity of 1.3 W/m C. The wall is to be insulated with material having an average thermal conductivity of 0.35...
-
Derive a formula for the second-best relative standard to regulate a polluting monopolist.
-
In January 1995, the Office of University Evaluation at Arizona State University surveyed faculty and staff members to find out their reaction to the closure of the university during Winter Break,...
-
Thierry, Ute, and Vishal are getting ready for their last period in the MBA program. Following the final exams, they intend to throw a big party with many of their friends from back home. Presently,...
-
Estimate the overall odds ratio of the set of tables in Problem3.6 and test whether the odds ratios are the same across the tables. Problem3.6 is: 3.6 Use the DOS data to test whether there is gender...
-
I know headquarters wants us to add that new product line, said Fred Halloway, manager of Kirsi Products East Division. But I want to see the numbers before I make a move. Our divisions return on...
-
Netflix estimates that North American demand for its streaming service has an elasticity of approximately -1.5. In 2022, 74 million subscribers generated revenues of just over $14 billion at an...
-
1. Discuss the main issues faced by Yalla Momos. 2. Evaluate the current financial performance of Yalla Momos and compare his performance to the industry ratios. 3. Elaborate on the relevant factors...
-
A multiple regression model is run on a sample of data. Partial results are shown below. SUMMARY OUTPUT Regression Statistics Multiple R R Square Adjusted R Square Standard Error Observations ANOVA...
-
3. Firm ABC is going to pay an annual dividend of $2.00 per share. Management just announced that future dividends will increase by 10 percent annually in the first three years and 5 percent annually...
-
Suppose there is a 5.5 x 106 N/C electric field in some region.
-
After Niles died, his employer paid his estate $2,000 of salary still owed to Niles. The board of directors of Niles employer also decided to give his widow Daphne the $10,000 it expected to give to...
-
Assume a processor with 3 DDR DRAM channels of width 64 bit, operating at 1.4 GHz. All channels support up to 4 ranks of DIMMS. A DIMM contains multiple chips with the following properties. Banks...
-
Do the following contracts need to be in writing to be enforceable? Explain why or why not. A contract whereby the president of NewCo. Gives a personal guarantee (i.e., uses personal assets as...
-
Discuss how leadership, recruitment, communication as well as diversity management strategies/processes contribute to the culture of a corporation.
-
How can NAFTA be beneficial to suppliers of Walmart?
-
Solve Problem 12.23 using the method of Broms. Assume that the pile is flexible and free-headed. Let the soil unit weight, = 16 kN/m 3 ; the soil friction angle, ' = 30; and the yield stress of the...
-
From the test specifications given in Table 5.2, show that the compactive energy in method C is 2700 kN m/m 3 . Table 5.2 Item Method A Method B Method C Diameter of mold 101.6 mm 101.6 mm 152.4 mm...
-
The results of a refraction survey (Figure 3.45a) at a site are given in the following table. Determine the thickness and the P-wave velocity of the materials encountered. Distance from the source of...
-
Consider an open economy with flexible exchange rates. Suppose output is at the natural level, but there is a trade deficit. The goal of policy is to reduce the trade deficit and leave the level of...
-
Flexible exchange rates and foreign macroeconomic events Consider an open economy with flexible exchange rates. Let UIP stand for the uncovered interest parity condition. a. In an IS-LM-UIP diagram,...
-
We showed that a reduction in the interest rate in an economy operating under flexible exchange rates leads to an increase in output and a depreciation of the domestic currency. a. How does the...
Study smarter with the SolutionInn App