The incremental rainfall intensity data given in the table below were recorded at a gage located on a small urban watershed. Using a 0.5-hour time step: (a) Plot the rainfall Hyetograph. (b) Determine the total rainfall depth during the storm event. (c) If the runoff depth is 4.65 mm, find the phi- index in mm/ hr. Rainfall intensity data- Time (hr) 0- 0.5- 1.0- 1.5- 2.0- 2.5- 3.0- 3.5- 4.0- 4.5- 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Rainfall Intensity 2 2.5 5 1.5 1 0.5 (mm/hr)

The incremental rainfall intensity data given in the table below were recorded at a gage located on a small urban watershed. Using a 0.5-hour time step: (a) Plot the rainfall Hyetograph. (b) Determine the total rainfall depth during the storm event. (c) If the runoff depth is 4.65 mm, find the phi- index in mm/ hr. Rainfall intensity data- Time (hr) 0- 0.5- 1.0- 1.5- 2.0- 2.5- 3.0- 3.5- 4.0- 4.5- 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Rainfall Intensity 2 2.5 5 1.5 1 0.5 (mm/hr)

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter16: Highway Drainage

Section: Chapter Questions

Problem 9P

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A gage on a small (0.75-acre) urban parking lot recorded the following incremental rainfall data. Time (hr) 0 1 Rainfall (cm) 0 5 0.5 4.7 1.5 10 2 12 2.5 3 3.5 10 4.5 3 4 2.3 4.5 0 a. Determine the total storm rainfall depth (in inches). Be careful with units. b. If all of the rainfall occurs as runoff (no losses) and the time base of a triangular hydrograph is 3 hours, find the peak flow of the hydrograph in cfs. Be careful with units.
a) 7 c) d) 300 8 The ordinates of the hyetograph of a 6-hr duration rainfall is given below. If the direct runoff is 33 mm, estimate the D-index in mm/hr. Time (hr) Rainfall intensity 10 0 (mm/hr) 0 1 7 2 18 3 25 14 10 5 3 6 12
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.
From the the given table, determine the direct runoff if the effective rainfall during 1-hr is 5 mm if the 1-hr UH due to 1 mm effective rainfall is known: Time (hr) UH (m^3/s) Q direct 3. 2. 3. 1. 4. Write the answer and attach the solution.
Assume ID:116644
The following Tables show the rainfall hyetograph for 2 hours rainfall storm and the resultant hydrograph from a watershed with an area of 100 Km². The rainfall depth P = 2 mm and the discharge Q = 5.5 m'/s. Answer the following questions by selecting the correct answer for each: Rainfall heytograph Period (hr) Runoff Hydrograph Time (hr) a (m3/s) P (mm) 0-0.5 0.5-1 2*P 1 1-1.5 3*P 2"Q 1.5-2 4*p 3 3*Q 4 4"Q 3"Q 6 1. What is the peak clischarge for this stom, Qp? 2. What is the total rainfall dlepth for this storm, P? 3. Calculate the rainfall intensity in the third period (1-1.5 hr), i. 4. Calculate the depth of runoff, R. 5. Calculate the phi-Index for this watershed. 6. Calculate the peak discharge for the Unit hydrograph, QP-UH in m3/s.
Subject water resources
QUESTION 3 10 A storm with 10 cm precipitation produced a direct surface runoff of 5.8 cm in the equivalent depth unit. The time distribution of the storm is given in Table below. Estimate the @-index of the storm and the excess rainfall hyetograph. Time from start (hr) Incremental 0.4 rainfall in each hr (cm) 4 6. 0.9 1.5. 3.3 T.7 1.6 1.0 0.5
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02: Table below shows a rainfall data gathered from a storm occurred on a watershed area 2851 km² with direct runoff 856 m³/sec. Determine the W and index for this area and check the validity of your solution. Time (hrs) Rainfall 14.3 8.0 7.2 3.8 2.0 (mm) 1 2 3 4 5 6 7 8 1.3 1.0 0.0 9 0.8 10 11 12 13 0.0 13.9 17.2 2.0 14 15 0.9 1.5
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Question 7 The total rainfall hyetograph of a storm, which took place over a basin is given below. Ordinates of Total Storm Hydrograph (TSH) obtained for the basin is given in the table below. The baseflow is constant and is 4 m³/s. If the depth of excess rainfall is 8 cm, determine: i (mm/hr) a) depth of direct runoff, b) depth of infiltrated water, c) -index, d) equation of surface runoff hydrograph in terms of UH₂ and lag times. e) UH2 ordinates of this basin, f) area of the basin. t TSH (hr) (m³/s) 0 4 24.68 뜨뜨뜨뜨뜨뜨 10 36 40 12 39 16 8 14 31 20 16 22 26 22 18 13 24 8 COL 4 5 20 Els 15 10 5 028 12 16 t (hr)