The eight-hour unit hydrograph (UH) of a watershed having a drainage area equal to 334.08 km² is as follows: Time (h) UH (cms/cm) 0 0 8 16 24 32 40 48 2.40 17.45 45.30 24.90 12.30 8.75 56 4.90 For a storm over the watershed having excess rainfall of 12 cm for the first eight hours and 30 cm for the second eight hours, and assuming a constant baseflow of 150 cms, determine the following: a) the total direct runoff hydrograph (DRH, m³/s), b) the total volume of direct runoff hydrograph (m²), c) the depth of direct runoff hydrograph (cm),

The eight-hour unit hydrograph (UH) of a watershed having a drainage area equal to 334.08 km² is as follows: Time (h) UH (cms/cm) 0 0 8 16 24 32 40 48 2.40 17.45 45.30 24.90 12.30 8.75 56 4.90 For a storm over the watershed having excess rainfall of 12 cm for the first eight hours and 30 cm for the second eight hours, and assuming a constant baseflow of 150 cms, determine the following: a) the total direct runoff hydrograph (DRH, m³/s), b) the total volume of direct runoff hydrograph (m²), c) the depth of direct runoff hydrograph (cm),

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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Probability, risk and uncertainty analysis for hydrological design

It gives a framework that is financially critical for finding the exceptional designs of hydrological systems with a reduced cost in total inclusive of the project cost and the disaster mitigation cost. But there would be hardly any assessment of a decent quality damage function. Hence, errors in demonstrating the hydrologic events, incorrect model parameters, and so on may occur. Here, we will discuss a specific hydrological design that of a detention basin for studying and understanding the risk-based procedure, uncertainties, and probability analysis by following a systematic framework.

Question

The eight-hour unit hydrograph (UH) of a watershed having a drainage area equal to 334.08 km² is as follows:
Time (h)
UH (cms/cm)
0
0
8
16
24
32
40
48
2.40 17.45 45.30 24.90 12.30 8.75
56
4.90
For a storm over the watershed having excess rainfall of 12 cm for the first eight hours and 30 cm for the second
eight hours, and assuming a constant baseflow of 150 cms, determine the following:
a) the total direct runoff hydrograph (DRH, m³/s),
b) the total volume of direct runoff hydrograph (m²),
c) the depth of direct runoff hydrograph (cm),

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Using the total direct runoff hydrograph given, derive a 2 hour unit hydrograph for the 2,850 acre drainage area. The rainfall duration was 2 hours and the total precipitation was 6 inches.
Figure 2.2 shows a catchment with seven rain guage stations inside it and three stations outside. The rainfall recorded by each of these stations are indicated by the figure. Draw the figure to an enlarged scale and calculate the mean precipitation method by (a) Isohyetal method and by (b) Arithmetic-mean method.
Please solve it again because previous solutions were wrong.
Problem 3 The table below contains the data for a one-hour unit hydrograph. Time Q (hr) (cfs/in) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 145 246 359 979 432 246 134 65 32 0 (a) Determine the area of the watershed to which this unit hydrograph corresponds. Report your answer in acres. (b) Assume a very intense 3-hour storm occurs shortly after a rainy period, so the ground is very saturated. The runoff from the first one-hour interval of the storm totals 0.5 in., the runoff from the second one-hour interval is 2.5 in, and the runoff from the third one-hour interval totals 1.7 in. The baseflow during and after the storm is 80 cfs. Derive the storm hydrograph for this 3-hour storm. table that clearly indicates how you used the unit hydrograph, sample calculations Provide a with sufficient explanation, explanatory sketches, and a graph of the storm hydrograph. (c) Determine the peak discharge that will occur in the river if this 3-hour storm occurs.
Can you answer please? Be fast please
For a 14 hours storm, accumulated rainfall is given below. Time (hours) 02 4 6 8 10 12 14 Accumulated rainfall (cm)| 0 | 0.8 3.0 5.8 6.9 8.1 9.6 10.8 If $index for the catchment is 0.4 cm/h, then the intensity of effective rainfall at 8th hour will be cm/h.
Figure 2.2 shows a catchment with seven rain guage stations inside it and three stations outside. The rainfall recorded by each of these stations are indicated by the figure. Draw the figure to an enlarged scale and calculate the mean precipitation method by Thiessen-mean method.