1. The 1-hr unit hydrograph for a watershed is given below. Determine the runoff for the third time interval from this watershed for the storm pattern given. The abstractions have a constant rate of 0.3 in/h. Time (hr) Precipitation (in) Unit hydrograph (cfs) 2 1.0 3 4 0.5 150 5 6 0.5 1.5 10 100 200 100 50

1. The 1-hr unit hydrograph for a watershed is given below. Determine the runoff for the third time interval from this watershed for the storm pattern given. The abstractions have a constant rate of 0.3 in/h. Time (hr) Precipitation (in) Unit hydrograph (cfs) 2 1.0 3 4 0.5 150 5 6 0.5 1.5 10 100 200 100 50

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter16: Highway Drainage

Section: Chapter Questions

Problem 8P

See similar textbooks

Similar questions

The ordinates of a hydrograph of surface runoff resulting from 4.5cm of rainfall excess of duration 8 hours in a catchment are as follows. Determine the ordinates of the 8h unit hydrograph for this catchment. Tabulate your solution and plot the 8H-UH.
Compute the diameter (cm) of the outfall required to drain storm water from the watershed described in figure below. Use rainfall intensity = 4 cm/hr. Average velocity of flow is 1 m/s. Other data are for: Area 1: C=0.5, area=0.005 km2. Area 2: C=0.4, area =0.01 km2. Area 3: C=0.7, area=0.015 km2.
The ordiantes of a 6h-UH of a watershed having a drainage area of 393 km^2 are given below. For a storm over the watershed having excess rainfall of 5cm for the first six hours and 15cm for the second six hours, compute the direct runoff hydrograph ordiantes and plot the hydrograph. (List all the DRH ordiantes in order)
Estimate ∅-index for a watershed having an area 5 acres. The runoff volume caused by the rainfall is 56000 ft^3. Round off your answer to the nearest whole number. Indicate the unit. Plot the hyetograph and superimpose the final ∅-index. (1 acre = 43560 ft^2) * Using the rounded-off ∅-index, estimate the volume of infiltration losses in cubic feet. *
R The following table show the precipitation in (mm/hr.) observed at the rain gages (A, B, and C) which shown in figure belo 1. Find the average precipitation each hr. over the catchment by Thiessen method . 2. Draw a graphical relation between the average precipitation each hr. and the time. - 3. Find the (& and W- index), if the runoff volume=104.4 cm.km® thr.) 1 2 3 a 5 Rain gage A 5 | [45 [ | & 8 3 7 [35 = [ 2 % a 9 |20 | 12 | & ain gage c i 10km rain gage - ain gge 106m
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
A triangular direct runoff hydrograph due to a storm has a time base of 90 hours. The peak flow of 60 m³/s occurs at 20 hours from the start of the storm, the area of catchment is 300 km². The rainfall excess of the storm (in cm), is
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
hydrology question 1- The mean rainfall over a catchment is presented in 20-min time intervals. If the D-index is 8 mm/hr, what are the runoff depth and runoff coefficient respectively? Time (min) Rainfall intensity (mm/hr) 0 15 20 21 40 25 60 17 80 8 100 6 120 10 140
A watershed of 37 km2 was subjected to a storm of 2-h duration from which the following information are recorded in Table Q3. a) Obtain a Unit Hydrograph for this watershed knowing that the base flow in the stream is estimated at 2 m3 /s. [10] b) Derive and plot 6-h Unit Hydrograph for the catchment area. Time (hours) 0 1 2 3 4 5 6 7 8 Discharge (m3 /s) 2 15 30 37 30 22 16 12 2
Flow rate in a stream discharging water shed runoff is 50 cubic meters per second after five days without rain. The flow rate in the stream reaches half that amount after 20 days without rain. Determine the equation of basal flow hydrograph. Find the amount of flow rate after a period of six months in the watercourse.
Average runoff from a 600 km2 catchment area was measured as 60 m3/s 3 points for a 3-hr period .If the depression storage is 10 cm and infiltration is 0.8 in what is the depth of rainfall (precipitation) in m ?