A catchment Area of 140 km^2 received 120 cm of rainfall in a year. At the outlet of the catchment in the stream draining thecatchment was found to have an average rate of 2.0 cubic meters per second (cms) for 3months, 3.0 cms for 6 months, and 5.0cms for 3 months.(a) What is the runoff incurred in the system in Million Cubic Meters (MCM)? Blank 1(b) Amount of Losses (L) in Million cubic meters (MCM)? Blank 2(c) What is the runoff coefficient? Blank 3Blank 1Add your answerBlank 2Add your answerBlank 3Add your answer

Given data, Area = 140 km^2 = 140×10^6 m^2 Rainfall = 120 cm Run off = 2 m^3/s for 3 months , 3 cm…

Answered: A catchment Area of 140 km^2 received…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

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1.2 A catchment area of 140 km² received 120 cm of rainfall in a year. At the outlet of the catchment the flow in the stream draining the catchment was found to have an average rate of 2.0 m/s for 3 months, 3.0 m/s for 6 months and 5.0 m/s for 3 months. (i) What is the runoff coefficient of the catchment? (ii) If the afforestation of the catchment re- duces the runoff coefficient to 0.50, what is the increase in the abstraction from precipi- tation due to infiltration, evaporation and transpiration, for the same annual rainfall of 120 cm?
A catchment area of 140 km2 received 120 cm of rainfall in a year. At the outlet of the catchment the flow in the stream draining the catchment was found to have an average rate of 2.0 m/s for 3 months, 3.0 m³/s for 6 months and 5.0 m'/s for 3 months. (i) What is the runoff coefficient of the catchment? (ii) If the afforestation of the catchment re- duces the runoff coefficient to 0.50, what is the increase in the abstraction from precipi- tation due to infiltration, evaporation and transpiration, for the same annual rainfall of 120 cm?
In a year, a 120 cm of rainfall received by a watershed with an area of 140 km2. The flow in the stream draining the watershed was found to have an average rate of 2.0 m3/s for 3 months, 3.0 m3/s for 6 months and 5.0 m3/s for 3 months. a.) what is the total outflow volume within the period in m3? b.) what is the runoff coefficient of the watershed? c.) if the afforestation of the watershed reduces the runoff coefficient to 0.50, what is the increase in the abstraction from precipitation due to infiltration, evaporation and transpiration, for the same annual rainfall of 120 cm (in m3)?
A catchment area of 150 km2 received 150 cm of rainfall in a year. At the outlet of the catchment, the flow in the stream draining the catchment was found to have an average rate of (i) 2.0 m3/s for 3 months, (ii) 3.02 m3/s for 6 months, and (iii) 5.02 m3/s for 3 months. (a) What is the runoff coefficient of the catchment? (ii) If the afforestation of the catchment reduces the runoff coefficient to 0.35, what is the increase in the abstraction from precipitation due to infiltration, evaporation and transpiration for the same annual rainfall of 150 cm? please convert in m/s
The observed rainfall and discharge of a catchment is given the table. The catchment area is 0.23Km^2. Time (h) 1 2 3 4 5 6 7 8 00 9 10 11 12 13 Rainfall (mm) 0 0 2 6 10 8 2 0 0 0 0 0 0 1. Estimate the base flow. 2. Estimate the surface runoff. 3. Estimate the initial loss 4. Estimate the continuous loss using phi method. Discharge (M3/s) 20 20 20 20 30 50 40 35 25 21 20 20 20
PROBLEM 2: Using the cumulative rainfall hyetograph given below for a 150-km2 watershed, determine the abstractions and the excess rainfall hyetograph using Horton's equation with fo = 40 mm/h, fe = 10 mm/h, and k = 2 h-1. Assume that an interception storage of 10 mm is satisfied before infiltration begins. Also, determine the depth and volume of excess rainfall and its duration. Time (h) 1 2 3 4 5 6 Cumulative rainfall (mm) 25 70 115 140 160 180
In a given year, a watershed with an area of 2500 km^2 received 130 cm of precipitation. The average rate of flow measured in a gage at the outlet of the watershed was 30 m^3/s, mostly as a result of runoff. Estimate the water losses due to the combined effects of evaporation, transpiration, and infiltration to ground water. A) How much runoff reached the river for the year (in cm)? B) Compute the runoff coefficient for this watershed. Remember that the runoff coefficient is the ratio of runoff to precipitation.
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.
(a) For a given year, a catchment with an area of 3000 km? received 160 cm of precipitation. The average flow rate measured in the river draining the catchment was 40 m³/s. Find DRO" (i) How much runoff reached the river for the year (in m')? TRO = P+A (ii) Estimate the amount of water lost due to the combined effects of evapotranspiration and infiltration etc (in m')? (iii) How much precipitation is converted into river runoff (in percentage)? 26. (iv) What is the ratio of runoff to precipitation?
2.2 cm of runoff results from a storm that lasted 24 hours over an area of 195.0 km². Assume all the runoff goes into a nearby river channel that was empty at the beginning of the storm, what is the average flow of the water in the channel in ft³/s and m³/s.
Example 7. A catchment of 200 hectares area has rainfalls of 7.5 cm, 2.0 cm and 5.0 cm in three consecutive days. The average index can be assumed to be 2.5 cm/day. Distribution- graph percentages of the surface runoff which extended over 6 days for every rainfall of 1-day duration are 5, 15, 40, 25, 10 and 5. Determine the ordinates of the discharge hydrograph by neglecting the base flow.
Question- A peak flow of a flood hydrograph due to a 6 hour storm is 470 m³/s. The corresponding average depth of rainfall is 8 cm. Assume an Infiltration loss of 0.25 cm/hour and a constant base flow of 15 m³/s. What is the peak discharge of 6 hour unit hydrograph for this Catchment?

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