A lake with a surface area of 525 acres was monitored over a period of time. During a one-month period, the inflow was 30 cfs, the outflow was 27 cfs, and a 1.5-in seepage loss was measured. During the same month, the total precipitation was 4.25 in. Evaporation loss was estimated as 6.0 in, a) Estimate the change in storage for the lake during the month in inches. b) What should be the outflow to produce an opposite change in storage from the computed magnitude in (a), considering that there are no changes in the other parameters?

A lake with a surface area of 525 acres was monitored over a period of time. During a one-month period, the inflow was 30 cfs, the outflow was 27 cfs, and a 1.5-in seepage loss was measured. During the same month, the total precipitation was 4.25 in. Evaporation loss was estimated as 6.0 in, a) Estimate the change in storage for the lake during the month in inches. b) What should be the outflow to produce an opposite change in storage from the computed magnitude in (a), considering that there are no changes in the other parameters?

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

A lake with a surface area of 525 acres was monitored over a period of time. During a one-month
period, the inflow was 30 cfs, the outflow was 27 cfs, and a 1.5-in seepage loss was measured.
During the same month, the total precipitation was 4.25 in. Evaporation loss was estimated as 6.0 in,
a) Estimate the change in storage for the lake during the month in inches.
b) What should be the outflow to produce an opposite change in storage from the computed
magnitude in (a), considering that there are no changes in the other parameters?

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Example Problem Water budget for a lake provides following observations: Precipitation, P = = 43 in./yr. Evaporation, E = 53 in./yr. Inflow to Lake, Qin = 1 in./yr. Outflow from Lake, Qout = 173 in./yr. Change in Lake storage, AS = -2 in./yr. Find the net groundwater flow. Solution: E SWIn GWin PPT Evap SW Out GWout
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Subject water resource