A catchment has the Horton infiltration parameters: fo= 150 mm/h, fc = 50 mm/h, and k = 3 min¹. The design storm is given below. Estimate the time when ponding begins. Interval (min) Average rainfall (mm/hr) 20 40 80 170 90 20 0-10 10-20 20-30 30-40 40-50 50-60

A catchment has the Horton infiltration parameters: fo= 150 mm/h, fc = 50 mm/h, and k = 3 min¹. The design storm is given below. Estimate the time when ponding begins. Interval (min) Average rainfall (mm/hr) 20 40 80 170 90 20 0-10 10-20 20-30 30-40 40-50 50-60

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: H.W a -A 3 hours storm produces a flood hydrograph as: t (hr) Q (m²/s) |0 3 6 9 | 4 9 12 18 | 12 15…

Q: 05. You have the ½h-UH due to 1 cm effective rainfall. Time (hours) ¼h - UH (m/s) 0.5 60 1.0 150 1.5…

Q: The long-term average annual precipitation (P) over a reservoir (surface area = 186 mi²) is 40…

A: (1) The long term average annual precipitation( P) over a reservoir is(2) Surface area…

Q: (1) In a given year, a catchment with an area of 2500 km² received 1.3 m of precipitation. The…

A: Given:- The catchment area = 2500 km2 The rainfall received by the area in a year = 1.3 m The…

Q: Time (hours) Rainfall (mm) 9 19 Losses (mm) 11 7 measured discharges at the catchment outfall are…

Q: The streamflow clata given in the lable was produced by a storm of 1-hour duration considered to…

Q: The Horton's infiltration equation for a basin is given by fp = 6 + 16e-2tt where fp is in mm/hr and…

A: The horton's infitration equation is fp=6+16·e-2t·tThis is in form of fp…

Q: If the runoff from an area of 22 m^2 is 16.5 L/min, determine the infiltration capacity under a…

Q: A reservoir is in a region where the average annual precipitation is 3106 mm and normal annual US…

A: Solution Given data Pan Evaporation= 3456 mm Average area= 50 km2

Q: For a two hour rainfall, the hyetograph superimposed with infiltration curve is as shown below. The…

A: For a two hour rainfall,The hyetograph superimposed with infiltration curve is as shownbelowto find…

Q: b) A 4-hour rain of an amount of 1 cm (i.e intensity of 1/4 cm/hr) falls over a catchment shown in…

A: The objective of the question is to determine the flow hydrograph at site 0 using the time-area…

Q: Question No. 04 Compute the following parameters for a storm with 60 cm of precipitation produced a…

Q: Q5: given the following 1 hr. unit hydrograph for two storms. duration each having a rainfall excess…

Q: Consider the catchment with recorded rainfall values as per the figure below (take the decimal point…

A: Hi there, the Thiessen method cannot be applied for the given problem since the area of each station…

Q: a. Using the rainfall data provided in Table 1, the two-hour unit hydrograph given in Table 2, a…

A: The rainfall data are provided in the table 1 and two hour UH is given in the table 2 we need to…

Q: Knowing that the catchment area represented in the chart below is 20.3 km², calculate the volume of…

A: Area of the catchment = 20.3km2

Q: For a catchment in India, the mean monthly temperatures are given. Estimate the runoff and annual…

A: We have to use Khosla method

Q: 150 mm of rain in 2 hours Area = 800,000 m2 L=1000 m S (average Slope = 0.01) unoff coefficients =…

A: volume of rainfall= Rainfall depth X AreaVolume of rainfall= 0.150 m X 800000 m2Volume of…

Q: For a catchment in India, the mean monthly temperatures are given. Estimate the runoff and annual…

A: It is given mean monthly temperatures and asked to estimate Runoff and annual runoff coefficient…

Q: During a 3 h storm event, it was observed that all abstractions other than infiltration are…

Q: Over a basin of area 300 km², there was a storm for 4 h with a uniform intensity of 4 cm/h. The…

A: Given Area A=300 km2 time t= 4hrs Intensity I=4 cm/h Runoff R= 40×106 m3

Q: Question 2. A 4-hour UH (GH) has the values shown below. Determine the runoff from a design downpour…

A: A 4-hour UHNet precipitation for the first 2 hours: 20 mm/hrNet precipitation for the next 2 hours:…

Q: of 15 m/s, estimate the direct runoff hydrograph (DRH) and the discharge of the 6 -h unit hydrograph…

A: Peak flow Average depth Infiltration loss =0.25 cm/h,Base flow It is required to find the peak…

Q: Q2: Estimate the peak flowrate for a catchment which has an area of 10 km². The length and slope of…

A: Given, A = 10 km2 or 1000 ha L = 1420 m S = 0.005 C = 0.30

Q: A watershed has an area of 3.9 acres, a runoff coefficient of 0.66 and an inlet time of 12.2…

A: Area of watershed, A = 3.9 acres Runoff coefficient, C = 0.66 Inlet time, Td =12.2 min Intensity,…

Q: Q3: A river catchment has a 2.0 hour unit hydrograph with the ordinates 0,3,11,35,55,66,63,40,22,9…

Q: A portion of a housing development in shown in the layout below. The maximum velocities of flow in…

A: For sewer Ainlet time t= 5.0 min then intensity i=1t+20=15+20=0.04mm/sarea A=1.2 hac and…

Q: The flow rates measured during a precipitation at the outlet of a basin with an area of 10800…

A: Surface runoff= Total flow-base flow Time(minute) Discharge (Q) Base flow surface runoff 1cm…

Q: Question1: (a) Given a rainfall duration of 1-hour and an effective precipitation of 1.5 cm and the…

A: Given: Excess precipitation = 1.5 cm Required: 1 hour unit hydrograph And resulting hydrograph from…

Q: Determine the peak flow of return period 5 years at the outlet D. The IDF equation for the area is:…

Q: Determine the direct runoff, the 0-index, and the excess rainfall Set hyetograph for the storm given…

Q: Q2: A small catchment of area 90 ha received a rainfall of 75 mm in 60 minutes due to a storm. At…

Q: The length of a parking lot is L = 100 m, and it is sloped at So = 0.02. The surface of the lot is…

A: The time of concentration (tc) represents the time it takes for the water to flow from the furthest…

Q: 3. For a 2 hour, 8 mm/h intensity rainfall, the hydrograph given in Table is observed. The area of…

A: time (hr)024681012141618202224flow rate(m3/sec)81814304538282418141088The area of watershed = 500…

Q: 3cm of net rain fell on a catchment during a one hour storm. The resulting total flow in the river…

A: Given values: 1 hour storm net rainfall = 3 cm Base-flow = 3 m3/s From the given values of time and…

Q: Calculate the rainfall intensity using the formula shown below for a rainfall duration of 13 minutes…

A: Given data Constant values Time duration To find Rainfall Intensity

Q: A gage on a small (0.75-acre) urban parking lot recorded the following incremental rainfall data.…

Q: Find the total hydrograph resulting from a storm with a gross rainfall intensity (in/hr

A: ###Finding of ordinates of total hydrogrogh or flood hydrogrogh resulting from given rainfall by…

Q: 2. of dred minutes due to a storm. At the outlet of the catchment, the stream draining the catchment…

Q: The Horton's infiltration equation for a basin is given by f= 6 + 16e-2t, where 'f' is in mm/hr and…

Q: 4-Calculate the amount of rain falling (storm water) on a water shed area, if you know the…

A: using rational method

Q: Over a basin of area 333 km², there was a storm for 6 h with a uniform intensity of 2 cm/h. The…

A: Given- Basin Area A=333 km2, 6 h storm, Intensity I=2 cm/h, Runoff- R=20×106 m3,

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

A catchment has the Horton infiltration parameters: fo= 150 mm/h, fc = 50 mm/h, and k = 3
min¹. The design storm is given below. Estimate the time when ponding begins.
Interval (min) Average rainfall (mm/hr)
20
40
80
170
90
20
0-10
10-20
20-30
30-40
40-50
50-60

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps with 3 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

Q.24 Over a basin of area 333 km², there was a storm for 6 h with a uniform intensity of 2 cm/h. The observed runoff was 20×106 m³. The average rate of 3 infiltration for the basin was A 5 mm/h B 10 mm/h C 20 mm/h D 40 mm/h
The rainfall intensity for each 20 min period are given below for a storm. The direct runoff from the basin is 2.5cm 20 MINUTES RAINFALL RAINFALL 1 2.5 2 5 a) What is the total storm rain? cm b) What is the Phi Ø index for the basin? 3 6.5 _cm/hr 4 3.5 5 1
Question 03 In a given year, a catchment with an area of 9536 km? received 1.3 m of precipitation. The average rate of flow measured in a river draining the catchment was 30 m³s1. a. How much total river runoff occurred in the year (in m³)? b. What is the runoff coefficient? c. How much water is lost due to the combined effects of evaporation, transpiration, and infiltration. (Express in m).
The flow rates measured during a precipitation at the outlet of a basin with an area of 32400 hectares are given below. It is assumed that the precipitation intensity is constant 60 mm/hr and the infiltration index of the basin is 10 mm/hr. Determine the duration of the unit hydrograph and obtain the 60-minute unit hydrograph of the basin. You can take the base flow as 100 m³/s.
Net Storm Rainfall Example 2-1 Rain falls as shown in the rainfall hyetograph (intensity Vs. time) in Fig. E2-1 (a). The o index for the Storm is 0.5 in./hr and is constant over 5 hr. Plot the net rainfall on the hydrograph (flow vs. time) given in Fig. E2-1 (a). Determine the total volume of runoff and the watershed area. 1cfs = 1.008 ac-in/hr 2.0 1.5 1.0 0.5 1 3. 4 Time (hr) 700 600 500 400 300 200 100 4 8 12 16 20 24 Time (hr) Time (hr) Q (cfs) Volume (cfs-hr) 0-2 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20 20-22 22-24 24-26 16 Q (cfs) iT (in./hr)
Problem 2 A watershed having an area of 28 km² records the following rainfall data. Time Rainfall Time Rainfall (mm) 0.6 (mins) 150 180 210 (mins) 30 (mm) 3.4 60 1.1 2.2 90 1.7 1.3 120 2.5 240 0.2 Determine the infiltration rate (in mm/hr) using the o-index method if the runoff volume was found to be 224,000 m³.
The infiltration rate f in a basin under ponding condition is given by f= 30 + 10e 2t where, f is in mm/h and t is time in hour. Total depth of infiltration (in mm, up to one decimal place) during the last 20 minutes of a storm of 30 minutes duration is
A drainage basin has a area of 7322 km2. The average annual precipitation for this area is 909 mm. The average surface water flow at the outlet of the catchment is 21.4 x 108 m3/year and the average groundwater flow out of the basin is 94.6 mm/year. Assume trailing zeros are significant if present. Determine the annual average evaporation in mm/year. (give your answer to one decimal place)
Determine the required area (in ft ) of a bioretention basin to service runoff from a shopping complex with 4 .2 acres of paved parking, 1.1 acre of sidewalks, 0.5 acre of landscaping. The 24-hr design storm is 1 inch. Use the empirical coefficients in Small Storm Hydrology method. There is no underdrain pipe for the bioretention basin. Use the following guidelines for the design: Ponding depth = 12 inch Media bed: 36 inches deep, porosity = 0.30 Gravel bed: 24 inches deep, porosity = 0.36
For the following rainfall rate, find the net runoff in cm, total rainfall and the value of W-index. Take Ø-index = 3. Time (min) 10 20 30 40 50 60 70 Rain rate (cm/hr) 2.5 2.5 10 7.5 1.25 1.25 5
Show full solution.According to rainfall data collected by a laboratory during storm events, the precipitation level in inches (X) varies jointly with runoff in cubic feet per second (Y). The joint probability mass function (PMF) of both variables are given by the following Table: Y 1 2 3 10 0.05 0.15 0 20 0.1 0.25 0.25 30 0 0.1 0.1 a. Determine and plot the marginal PMF of runoff.b. Determine the correlation coefficient between X and Y.