To determine the daily evaporation at Taal lake, a USWB Class A evaporation pan is maintained. The water level in the pan is 200mm at the beginning and is observed every day. Water is added if the water falls to about 17.5cm to the same depth during the first day. Estimate the daily pan evaporation for the 14-day period for which readings are summarized in the following table.

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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To determine the daily evaporation at Taal lake, a USWB Class A evaporation pan is maintained. The water level in the pan is 200mm at the beginning and is observed every day. Water is added if the water falls to about 17.5cm to the same depth during the first day. Estimate the daily pan evaporation for the 14-day period for which readings are summarized in the following table.
Rainfall
(mm)
during the
day
4.1
Evaporation
(mm)
during the
day
199.0
198.0
Rainfall
(mm)
during the
day
0.2
Evaporation
(mm)
during the
day
182.7
180.9
Day
Day
1
8.
3.8
9.
3
4.2
196.7
10
179.4
4
1.3
196.2
11
176.6
0.2
193.9
12
0.2
197.7
6.
189.3
13
196.4
7
0.5
185.5
14
0.5
194.9
Transcribed Image Text:Rainfall (mm) during the day 4.1 Evaporation (mm) during the day 199.0 198.0 Rainfall (mm) during the day 0.2 Evaporation (mm) during the day 182.7 180.9 Day Day 1 8. 3.8 9. 3 4.2 196.7 10 179.4 4 1.3 196.2 11 176.6 0.2 193.9 12 0.2 197.7 6. 189.3 13 196.4 7 0.5 185.5 14 0.5 194.9
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