A catchment area of 120 sq km has three distinct zones, namely zone A with an area of 61 sq.km and an annual runoff of 52 cm, zone B an area of 39 sq.km and an annual runoff of 42 cm, and area C with an area of 20 sg.km and an annual runoff of 32 cm. The annual run-off from the catchment is: 45.4 cm Ob. 47.3 cm O c. 42 cm O d. 126 cm

A catchment area of 120 sq km has three distinct zones, namely zone A with an area of 61 sq.km and an annual runoff of 52 cm, zone B an area of 39 sq.km and an annual runoff of 42 cm, and area C with an area of 20 sg.km and an annual runoff of 32 cm. The annual run-off from the catchment is: 45.4 cm Ob. 47.3 cm O c. 42 cm O d. 126 cm

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A catchment has the Horton infiltration parameters: fo= 150 mm/h, fc = 50 mm/h, and k = 3 min¹. The design storm is given below. Estimate the time when ponding begins. Interval (min) Average rainfall (mm/hr) 20 40 80 170 90 20 0-10 10-20 20-30 30-40 40-50 50-60
If the Kuils River has a catchment area of 200 square kilometres and receives in a year 600 mm/year of rainfall, and the runoff from this catchment is 100 mm/year. Assuming that there is no loss to or gain of water from subsurface storage, the amount of evaporation isA) 400 mm/year, B) 500 mm/year, C) 300 mm/year D) 900 mm/year
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?
Solve the problem using the NRCS method for a watershed located right outside New York City, New York for a 50 year storm event. Assume the soil hydrologic group B (65%), C (25%) and D (10%). Given Am-1.29 sm. Impervious = 6.6 acres, Woods =819 acres. Overland flow: L=100 ft, s=4%, fair; Shallow Concentrated Flow: unpaved L= 2300 ft, s=2.7%, stream flow L=9000 ft, s= 3.4% The Time of Concentration is 20¹ 12¹ n = 0.035
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.
There is a reservoir covering a 500-hectare area that has a constant draft of water pumped from it. The reservoir has a constant inflow from an upstream watershed, where the annual rainfall is 550 mm and the annual runoff is 312 mm. Over a 30-day period, the reservoir depth drops 9.5 m. During this time, there was precipitation over the reservoir of 87 mm and the total evaporation was 73 mm. What is the daily draft of water from the reservoir (in hectare-meters)?
Question A 4-hour rainfall in a catchment of 250 km² produces rainfall depths of 6.2 cm and 5 ❤ cm in successive 2-hour unit periods. Assuming the index of the soil to be 1.2 cm/hour, the runoff volume is A 1.6 ha-m B D 16 ha-m 160 ha-m 1600 ha-m
Q.2 A catchment having an area of 150 km2 has the ø index 0.3 cm/hr. The base flow at the 3 outlet is 10m³/s. One hour unit hydrograph of the catchment area is triangular in shape with a time base of 20 hours. The peak ordinate occurs at 8 hours. If a rainfall of 4.5 cm occurs in 1 hour, then the peak ordinate of the flood hydrograph will be:
Problem 3. A stream of 175 liters per second was diverted from the river and 105 liters per second was delivered to the field. An area of 2 hectares was irrigated in hours. The root-zone depth was 1.8 m. The runoff averaged 50 liters per second for 3 hours. The depth of water penetration varied linearly from 1.8 m at the head of the field to 1.2 m at the end of the field. Determine the water-conveyance efficiency, the water-application efficiency, * ~ff:
A reservoir had a water surface elevation of 110 m above the datum at the beginning of the month. In the same month, the reservoir received an average inflow of 7.5 cms (m3/s) from surface runoff sources. For the same period, the outflow from the reservoir had an average value of 5 cms. Further, in the same month, the reservoir received a rainfall of 180 mm and losses due to evaporation of 5 cm. Assume the area of the lake is 50 km2 acres and assume no contribution from groundwater storage. What is the water surface elevation of the reservoir after the month?