Example 6. Given the ordinates of a 4-h unit hydrograph as below, derive the ordinates of a 12-h unit hydrograph for the same catchment. Time (h) 4 8 12 16 20 24 28 32 36 40 44 Ordinate of 4-h UH 0 20 80 130 150 130 90 52 27 15

Example 6. Given the ordinates of a 4-h unit hydrograph as below, derive the ordinates of a 12-h unit hydrograph for the same catchment. Time (h) 4 8 12 16 20 24 28 32 36 40 44 Ordinate of 4-h UH 0 20 80 130 150 130 90 52 27 15

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: 40 76 52 80 133 200 227 533 800 1067 2000 2667 3200 the stage for a discharge of 3500 cms.

Q: Ordinates ofg 2-hr unit hydrograph are given below.

A: Time (hour) UH (m³/s) 0 0 1 65 2 155 3 255 4 405 5 635 6 855 7 805 8 505 9 455…

Q: Using the given 6-h unit hydrograph derive the flood hydrograph due to the storm given below. UH:

A: The direct runoff hydrograph is next calculated by the method of superposition as indicated in Table…

Q: Given below in table Q4 are the ordinates of a 6-hr unit hydrograph for a catchment. Table Q4 Time…

A: time uh ordinate due to 3.5 cm first storm ordinate due to 2.5 cm second storm…

Q: For a catchment isohyets are drawn and area is calculated using planimeter as shown in figure. The…

A: as per given isohyets for a catchment area,To the average precipitation over the catchment area

Q: The ordinates of a 3 hour unit hydrograph are given below: 12 15 18 21 24 27 30 16 12 9 7 5 3 0 Time…

Q: 8.1 The storage, elevation and outflow data of a reservoir are given below: Storage 10 m² Outflow…

A: Since 8.1 and 8.2 are both separate question,so as per bartleby guidelines, solving first one…

Q: 1. The following are the ordinates of the 9-hour unit hydrograph for the entire catchment of the…

A: We have to determine the value of necessary modification for the shape of the hydrograph according…

Q: A 2-hour unit hydrograph can be approximated as trapezoidal as shown in figure. The unit hydrograph…

A: To Find :Catchment area ?

Q: The 1-hour unit hydrograph for the St. Joseph watershed at Acono is given in Table 3.1. (One unit is…

Q: linear relation between Discharge

A: Given: S. No X Y 1 18 905.7 2 6 120.66 3 1 12.86 4 3 40.5 5 1 12.86 6 20 1108.78 7…

Q: The following stream flow data was collected from a watershed of 280.35 acres. Plot the hydrograph…

A: Given:- The area of the watershed = 280.35 acres Discharge for a given time period is given To…

Q: The given table shows a unit hydrograph of 2-hour duration. Derive 6-hour unit hydrograph for the…

A: Given data- 2-hour Unit Hydrograph is given- To Find- It is needed to find the 6-hour Unit…

Q: Q4-The stream flows due to three successive storms of 2.9, 4.9 and 3.9 cm of 6 hours duration each…

A: Given;Three storm of intensity 2.9,4.9 and 3.9 cm of 6 hr. duration each. Area of basin (A) = 118.8…

Q: (b) The hydrograph resulting from an 8-hr storm over a catchment area of 4000 km² given in the table…

Q: Given below are ordinates of hydrograph, separate the base flow from direct runoff flow by using the…

Q: Sounding and current meter measurement data for Wawa River are shown below. The starting velocity…

A: Given, The starting velocity constant is 0.04 The proportionality constant is 0.7

Q: Q2/ Given below are ordinates of hydrograph, separate the base flow from direct runoff flow by using…

Q: 1: Following are the ordinates of a storm hydrograph of a river draining a catchment area of 423 kmz…

A: For any catchment when Strom occurs due to that stream flows in that catchment out of that water…

Q: What volume equalization basin is required to even outflow variations in the following data? Assume…

A: Given: Flow values and time To find: Volume of equalization basin

Q: 5. Simple triangular one-hour unit hydrographs of three different catchments [A, B and C] have been…

A: Assume depth of rainfall for unit hydrograph=1 cmthen area of each catchment =area of…

Q: 1. (a) Examine the two hydrographs presented below for an area of 5000 acres. Which of the two is a…

A: Data given Find: (a) Identify the UH (b) Find 3 hr UH

Q: 10-min unit hydrograph for a catchment is given in Table 1 below. Table 1: 10-min Unit Hydrograph…

A: Given Data is of a Unit hydrograph. Time has been given in minutes Discharge is given in m3/s…

Q: b) The given table shows a unit hydrograph of 2-hour duration. Derive 4-hour unit hydrograph for the…

A: Given data : Unit hydrograph (hereafter mentioned as UH) of 2- hour duration Time (hours) 0 2 4 6…

Q: Hydrology Flood Routing HW • Q1// hydrograph • The inflow and outflow for a river reach are as shown…

Q: One of the following not an example of fossil fuels... O a. Coal O b. Wood O c. Diesel O d. Petrol

A: Fossil fuels- It is defined as a type of non-renewable source of energy obtained from the remains of…

Q: Determine the average velocity for the stream given the following data. No need to graph. Velocity…

A: table for distance, depth and velocity is given and it has been asked in the question to find out…

Q: The given table shows a unit hydrograph of 2-hour duration. Derive 6-hour unit hydrograph for the…

A: To find the 6- hours unit hydrograph-

Q: The ordinates of a 6-h unit hydrograph are as given below: Time (h) 18 24 30 36 42 48 6 12 54 60 25…

A: Time (h)6-h UH Ordinates (m³/s)2 cm Rainfall Excess (First 6 hours)4cm Rainfall Excess (Second 6…

Q: The following are the ordinates of the 4-hr unit hydrograph for a watershed: 0 2 4 6 Time (hr)…

A: 4-hr unit hydrograph is shown below Time (hr) 0 2 4 6 8 10 12 Discharge (m^3/s) 0 20 50 75 90…

Q: (a) Determine the area of the watershed to which this unit hydrograph corresponds. Report your…

Q: Derive and plot 3-hour Unit hydrograph for a stream which drains an area of around (401) km2.…

Q: The following are the ordinates of the 9-bour unit hydrograph for the entire catchment of the river…

A: We have to determine the value of necessary modification for the shape of the hydrograph according…

Q: 1) Velocity Area Method Given the tabulated data taken from a section of a stream, determine what is…

Q: The ordinates of a 4-hour unit hydrograph for a 650km² catchment are given in Table Q2 below. Derive…

Q: Example 4. Following are the ordinates of a storm hydrograph of a river draining a catchment area of…

A: Ordinates of a storm hydrograph of a river having catchment area=423 km2 due to a 6-h isolated…

Q: Using Isohyetal Method, find average rainfall over a catchment. The datas are: Isohyetes (cm) 12 13…

Concept explainers

Unit Hydrograph

Hydrology is the science which deals with the study of water on the earth’s surface. The word Hydrograph is derived from the word hydro which means water. Hydrograph is basically a graph in which the discharge is plotted against the time interval at a specific point in a river or other channel. In a hydrograph, the discharge is plotted along the y-axis and time interval is plotted along the x-axis. Hydrograph is used to estimate the runoff. The variations in discharges with the change in time is shown by a hydrograph. It was revealed that the total discharge at an outlet increases with time by a kinematic wave model.

Question

Example 6. Given the ordinates of a 4-h unit hydrograph as below, derive the ordinates of a
12-h unit hydrograph for the same catchment.
Time (h)
4
12
16 20
24 28
32
36
40
44
Ordinate of 4-h UH 0
20
80 130 150 130
90
52
27
15
5

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

A watershed of (30+X) km2 was subjected to a storm of 2-h duration from which the following information are recorded in Tablea) Obtain a Unit Hydrograph for this watershed knowing that the base flow in the stream is estimated at 2 m3/s. b) Derive and plot 6-h Unit Hydrograph for the catchment area.Time (hours) 0 1 2 3 4 5 6 7 8Discharge (m3/s) 2 15 30 37 30 22 16 12 2
5. Simple triangular one-hour unit hydrographs of three different catchments [A, B and C] have been fit to data and are shown below. UH B 20 m'/s UH A 15 m'ls 2 hr 6 hr 8 hr 3 hr 40 m'/s - UH C 4 hr 12 hr (a) What is the area of each catchment? (b) Catchments A and B are similar, except that one contains a town. Which is more likely to contain a town and why (C) Net rainfall of 15 mm in the first hour, 25 mm in the second hour and 15 mm in the third hour falls on catchment A. Calculate the resulting run-off as a function of time. (d) Net rainfall of 15 mm in the first hour, 25 mm in the second hour and 15 mm in the third hour falls on catchment B. Calculate the resulting runoff as a function of time. (e) The rivers flowing out from catchments A and B meet shortly after they leave the catchments. A storm with the net rainfall given above moves across the two catchments, with the rainfall starting an hour later on catchment B than catchment A. Calculate the resulting combined run-off as…
A watershed of (30+X) km2 was subjected to a storm of 2-h duration from which the following information are recorded in Table a) Obtain a Unit Hydrograph for this watershed knowing that the base flow in the stream is estimated at 2 m3/s. b) Derive and plot 6-h Unit Hydrograph for the catchment area. Time (hours) 0 12345678 Discharge (m3/s) 2 15 30 37 30 22 16 12 2
PROBLEM 2. Ordinates ofg 2-hr unit hydrograph are given below. U (m³/s) 0 65 155 255 405 635 855 805 505 455 355 255 155 65 0 t (hr) 0 1 2 3 5 6 S 9 10 4 7 11 12 13 14 Find the ordinates of the direct runoff hydrograph resulting from the following storms i (cm/hr) t (hr) 2
Please provide a detailed solution. Subject: engineering hydrology
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.
Want in 30min
1. (a) Examine the two hydrographs presented below for an area of 5000 acres. Which of the two is a unit hydrograph? Please show how you arrived at this conclusion. (b) Using the hydrograph that you chose from part (a), assuming it is a 1-hr UH, create a 3-hr UH. Hydrograph 1 Hydrograph 2 (c) 1400 1200 1000 800 600 400 200 0 0 2 4 6 Time (hr) 8 10 12
I need the answer quickly
Question No. 22 The ordinates of a 2-h unit hydrograph at I hour intervals starting from time t = 0, are 0, 3, 8, 6, 3, 2 and 0m³/s. Use trapezoidal rule for numerical integration, if required. A storm of 6.6 cm occurs uniformly over the catchment in 3 hours. If o -index is equal to 2 mm/h and base flow is 5 m³/s, what is the peak flow due to the storm?
Solution fast
I need the answer as soon as possible