1. The New York City water supply system is one of the most extensive municipal water systems in theworld. This complex system relies on a combination of tunnels, aqueducts and reservoirs to meet thedaily needs of millions of residents of the city. The watersheds that feed into NYC reservoirs have atotal surface area of 1,969 mi?, and receive an average annual rainfall of 47 inches per year.a. If all of the rain falling on the watersheds is collected in reservoirs, how much water will becollected in the reservoirs?billion gallons per dayCheckb. Would you expect all of the rain falling on the watersheds to reach the reservoirs? Brieflyexplain.c. If 35% of the rain falling on the watersheds is collected in reservoirs (i.e., the surface runoffcoefficient = 0.35), how much water will be collected in the reservoirs?billion gallons per dayd. If we experienced a prolonged period of drought with an annual rainfall of 22 inches per year,(For this part, again consider that 35% of the rain falling on the watersheds is collected inreservoirs.)billion gallons per dayChecke. Would there be enough water falling on the watershed to meet the current water demand ofNYC of 1.1 billion gallons per day under our average rainfall (part c) and under a prolongeddrought (part d)? Briefly explain.

Average rainfall= 47 in/year ςA= 1.969 mi2ςA=1.969×63360ςA=7.90×109 in2

1. The New York City water supply system is one of the most extensive municipal water systems in the world. This complex system relies on a combination of tunnels, aqueducts and reservoirs to meet the daily needs of millions of residents of the city. The watersheds that feed into NYC reservoirs have a total surface area of 1,969 mi?, and receive an average annual rainfall of 47 inches per year. a. If all of the rain falling on the watersheds is collected in reservoirs, how much water will be collected in the reservoirs? billion gallons per day Check b. Would you expect all of the rain falling on the watersheds to reach the reservoirs? Briefly

1. The New York City water supply system is one of the most extensive municipal water systems in the world. This complex system relies on a combination of tunnels, aqueducts and reservoirs to meet the daily needs of millions of residents of the city. The watersheds that feed into NYC reservoirs have a total surface area of 1,969 mi?, and receive an average annual rainfall of 47 inches per year. a. If all of the rain falling on the watersheds is collected in reservoirs, how much water will be collected in the reservoirs? billion gallons per day Check b. Would you expect all of the rain falling on the watersheds to reach the reservoirs? Briefly

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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Question

1. The New York City water supply system is one of the most extensive municipal water systems in the
world. This complex system relies on a combination of tunnels, aqueducts and reservoirs to meet the
daily needs of millions of residents of the city. The watersheds that feed into NYC reservoirs have a
total surface area of 1,969 mi?, and receive an average annual rainfall of 47 inches per year.
a. If all of the rain falling on the watersheds is collected in reservoirs, how much water will be
collected in the reservoirs?
billion gallons per day
Check
b. Would you expect all of the rain falling on the watersheds to reach the reservoirs? Briefly
explain.
c. If 35% of the rain falling on the watersheds is collected in reservoirs (i.e., the surface runoff
coefficient = 0.35), how much water will be collected in the reservoirs?
billion gallons per day
d. If we experienced a prolonged period of drought with an annual rainfall of 22 inches per year,
(For this part, again consider that 35% of the rain falling on the watersheds is collected in
reservoirs.)
billion gallons per day
Check
e. Would there be enough water falling on the watershed to meet the current water demand of
NYC of 1.1 billion gallons per day under our average rainfall (part c) and under a prolonged
drought (part d)? Briefly explain.

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