Problem 3. A 50-ha catchment has the following time-area relationship. Estimate the runoff hydrograph (cfs) using the time-area method for a 30-min rainfall hyetograph given. Time (min) Contributing area (na) 1 10 2 15 20 10 25 30 30 50 Time (min) Average rainfall intensity (cm/hr) 0-5 10 5-10 10-15 6. 15-20 4. 20-25 3 25-30 1

Problem 3. A 50-ha catchment has the following time-area relationship. Estimate the runoff hydrograph (cfs) using the time-area method for a 30-min rainfall hyetograph given. Time (min) Contributing area (na) 1 10 2 15 20 10 25 30 30 50 Time (min) Average rainfall intensity (cm/hr) 0-5 10 5-10 10-15 6. 15-20 4. 20-25 3 25-30 1

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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Similar questions

Based on 14 days runoff data given in TABLE Q3(c), determine the unit hydrograph for the catchment if the area is 4500 km². Separate the baseflow by using appropriate method.
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
5. From the 1mm 6 hour unity hydrograph given below, derive the 2 hour unit hydrograph. Time 12 18 24 30 (hrs) UH 15 8 3.6 0.6 0.0 (cumecs) What would be the peak surface runoff resulting from 3mm of rainfall falling in the space of two hours?
Please answer question 2
C9
Given the data below: Drainage area = 405 hectares Neglect base flow TIME Hr. 0 2 4 6 8 10 12 14 16 18 Determine the following a) Direct runoff depth (Dr) b) Unit hydrograph peak flow c) Effective duration ORDINATES OF FLOOD HYDROGRAPH cu.m/s 0 0.6 1.1 2.6 5.4 4 2.6 ft. 1.7 0.3 0 cm per cm of runoff ORDINATES OF 2HR UNIT HYDROGRAPH Per cm per runoff
The ordinates 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 5 cm for the first six hours and 15 cm for the second six hours, compute the direct runoff hydrograph ordinates and plot the hydrograph. Compute the depth of direct runoff in cm. Assuming constant baseflow of 100 m^3/s, compute the storm hydrograph ordinates and plot the hydrograph. (List all the DRH ordinates in order, separated by a single space.)
An 40-ha watershed was subjected to a 5- year rainfall with a depth of 122 mm with characteristics given below. Compute for the peak runoff of the watershed. Hydrologic Soil Group Land Use, Area Curve Treatment, and (ha) Number Condition Row crop, 24 82 contoured, good Woodland, good В 16 55