WATER RESOURCES ENGINEERING
3rd Edition
ISBN: 9781119490579
Author: Mays
Publisher: WILEY
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Chapter 2, Problem 2.6.4P
To determine
The answer for water resources sustainability.
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A reservoir is proposed for a city’s water supply. It has been sized so that wet season flows can be saved to provide water in the dry season. The population of 100,000 and the economic activity in the city are stable – no substantial change is expected for the next 20 years. The per capita water demand was taken to be 300 liters/person/day, and it does not change by the time of year. Based on 30 years of historical river flow data and the projected monthly demand for the next 20 years, it is estimated that a storage equal to 4 months of demand is adequate.
a) What is the storage capacity of the reservoir?
b) The capital cost of providing the storage is $20/m3, and the annual operating and maintenance cost is 5% of the capital cost. The maximum the residents are willing to pay for the water is $2/m3. What is the projected rate of return on this investment over the 20 years project plan.
Discuss the hydrologic cycle in terms of water on land areas (that is, the source of land-area surface and subsurface water, movement patterns, and change of location).
The average travel time for water to pass through a subsystem of the hydrologic cycle
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