2. A 15mm rainfall is recorded over a small catchment according to the table below. Infiltration tests in the area have given the following Horton equation parameters: a. Calculate the infiltration capacity as a function of time. It is assumed that the soil surface is always ponded with water. Can the Horton equation be applied to calculate infiltration for this rainfall event? fo=27 mm/hr, f.=6 mm/hr; k=3.5 hr. %3D

2. A 15mm rainfall is recorded over a small catchment according to the table below. Infiltration tests in the area have given the following Horton equation parameters: a. Calculate the infiltration capacity as a function of time. It is assumed that the soil surface is always ponded with water. Can the Horton equation be applied to calculate infiltration for this rainfall event? fo=27 mm/hr, f.=6 mm/hr; k=3.5 hr. %3D

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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</o:p> Use Horton’s infiltration equation to compute the total infiltrated water (in inch per unit area) during a period of 75 minutes from the beginning of a rainfall event having a constant rainfall intensity of 1.2 in/hr. The soil has parameters fo = 1.0 in/hr, fc = 0.25 in /h and k = 0.26 hr-1 . When does ponding occur during this storm?</o:p>
A catchment soil has a Horton infiltration parameter: f0=240 mm/hr, fc=30 mm/hr and k=0.2 min^-1. Calculate the infiltration rate right after two hours. Assuming a rain of constant intensity of 50 mm/hr occurs and lasts fo 3 hours, calculate the amount of rain that infiltrates into the soil.
For a small catchment, the infiltration rate at the beginning of rain was observed to be 90 mm/hr and decreased exponentially to a constant rate of 8 mm/hr after 2.5 hr was 50 mm. Develop the Horton's equation for the infiltration rate at any time t < 2.5 hr.
Problem 3.2. Assuming that Horton infiltration Eq. 3.4 is valid, determine the constant infiltration rate if fo = 50 mm/h (2.0 iph), ƒ at 10 min is 13 mm/h (0.5 iph), and k = 12.9. What is the infiltration rate at 20 min?
Q3: An infiltration capacity curve prepared for a catchment indicated an initial infiltration rate of 2.5 cm/hr and attains a constant value of 0.5 cm/hr after 10 hours of rainfall with the Horton’s constant k = 1 per week. What will be the infiltration rate after 5 hours of rainfall? What will be the Infiltration loss in first 5 hours? Determine the total Infiltration loss.?
The Horton's infiltration equation for a basin is given by f = 6 + 16e-²t, where ' f' is in mm / hr and t is in hours. What are the values of fo. fc and k? If a storm occurs on this basin with an intensity of more than 22 mm/hr, determine the depth of infiltration for first 45 minutes and the average infiltration rate for the first 75 minutes ?
The Horton's infiltration equation for a basin is given by f = 6 + 15 e ²t where fis in mm/hr and t is in hour. (i) What are the values of f f and k. (ii) A storm occurs on this basin with an intensity of more than 22 mm/hr, determine the depth of infiltration for the first 40 min and average infiltration for first 75 min.
An infiltration capacity curve prepared for a catchment indicated an initial infiltration capacity of 2.5 cm/hr and attains a constant value of 0.5 cm/hr in 10hrs of rainfall with a Horton's constant k=6/day. Determine the following: 1. Draw the infiltration curve and provide labels 2. Calculate the infiltration rate at 3.5hrs. 3. Calculate the infiltration loss at t1=3.5 hrs t2=5.0hrs. 4. Draw the infiltration curve and shade the area bounded by the infiltration loss. Refer from the previous question 5. Calculate the infiltration loss at t1=3.5hrs t2=5.0hrs (exponential function) and t1=4.5hrs t2=7.30hrs (linear function) 6. Draw the infiltration curve and shade the area bounded by the infiltration loss. Refer from the previous question
The Horton's infiltration equation for a basin is given by f= 6 + 16e-2t, where 'f' is in mm/hr and tis in hours. What are the values of fo, f and k? If a storm occurs on this basin with an intensity of more than 22 mm/hr, determine the depth of infiltration for first 45 minutes and the average infiltration rate for the first 75 minutes?
1. Parameters in Philip's equation for a clay soil are S- 45 cm-h'12 and K 10 cm/h. Determine the cumulative infiltration and the infiltration rate at 0.5-hour increments for a 3-hour period. Plot both as functions of time. Plot the infiltration rate as a function of the cumulative infiltration. Assume continuously ponded conditions. 2. A 5-hr storm over a 15-ac basin produces a 5-in. rainfall: 1.2 in./hr for the first hour, 2.1 in./hr for the second hour, 0.9 in./hr for the third hour, and 0.4 in./hr for the last two hours. Determine the infiltration that would result from the Horton model with k = 1.1/hr, fc = 0.2 in./hr, and f0 = 0.9 in./hr. Plot the overland flow for this condition in in./hr vs. t.
A 15 mm rainfall is recorded over a small catchment according to the table below.Infiltration tests in the area have given the following Horton equation parameters:fo= 27 mm/hr; fc = 6 mm/hr; k= 3.5 hr.Time (hr) Rainfall intensity (mm/hr)0.00-0.25 400.25-0.50 30.50-0.75 120.75-1.00 16(a) Calculate the infiltration capacity as a function of time. It is assumed that the soil surface is always ponded with water.(b) Can the Horton equation be applied to calculate infiltration for thisrainfall event?
Question 2: After conduct an experiment, you found that the soil for the watershed have an initial rate of infiltration equal to 1.35 in./hr and a final capacity of 0.3 in./hr. Assuming that the time constant k = 0.4, calculate the soil infiltration capacity at the times 10 min, 15 min, 30 min, 1 hr, 2 hr, 4 hr, and 6 hr using Horton's equation. Infiltration