Answered: A 927-acre catchment has been monitored…

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 927-acre catchment has been monitored for many years. It has been found that the average annual rainfall over the catchment is 37 inch and that the average streamflow is 1.0 cfs. Geologic investigations reveal a bedrock underlying the catchment that effectively prevents any deep seepage or groundwater recharge. Estimate the average annual evapotranspiration in inches for this catchment.

Expert Solution

Step 1

Given data

Area of catchment,

A=927 acre

A= $927 \times 43560$

A= $40.38 \times 10^{6} sq . feet$

Average depth of rainfall over catchment is given as

P=37 inch

P= $37 \times \frac{1}{12} feet$

P=3.0833 ft/year

Surface Runoff, R=1.0cfs

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