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A reservoir with as surface area of 300 hectares had the following average values of climate parameters during a week: • Water temperature = 36°C • Relative humidity = 30% • Wind velocity at 1.0 m above ground surface = 20 km/h Estimate the average daily evaporation from the lake by using Meyer’s Formula. ?? = ?? (?? − ??)( ? + ?? /??) ?? = coefficient accounting for various other factors 0.36 for large deep waters 0.50 for small, shallow water ?? = ? (? ^? /?)

A reservoir with as surface area of 300 hectares had the following average values of climate parameters during a week: • Water temperature = 36°C • Relative humidity = 30% • Wind velocity at 1.0 m above ground surface = 20 km/h Estimate the average daily evaporation from the lake by using Meyer’s Formula. ?? = ?? (?? − ??)( ? + ?? /??) ?? = coefficient accounting for various other factors 0.36 for large deep waters 0.50 for small, shallow water ?? = ? (? ^? /?)

Structural Analysis
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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A reservoir with as surface area of 300 hectares had the following average values of climate parameters during a week:

• Water temperature = 36°C

• Relative humidity = 30%

• Wind velocity at 1.0 m above ground surface = 20 km/h

Estimate the average daily evaporation from the lake by using Meyer’s Formula.

?? = ?? (?? − ??)( ? + ?? /??)

?? = coefficient accounting for various other factors 0.36 for large deep waters 0.50 for small, shallow water

?? = ? (? ^? /?)

SATURATION VAPOUR PRESSURE OF WATER Temperature ew (°C) A A (mm/°C) 0.30 0 4.58 5.0 6.54 0.45 7.5 7.78 0.54 10.0 9.21 0.60 12.5 10.87 0.71 15.0 12.79 0.80 17.5 15.00 0.95 20.0 17.54 1.05 22.5 20.44 1.24 25.0 23.76 1.40 27.5 27.54 1.61 30.0 31.82 1.85 32.5 36.68 2.07 35.0 42.81 2.35 37.5 48.36 2.62 40.0 55.32 2.95 45.5 71.20 3.66 TABLE 3.6 VALUES OF K FOR SELECTED CROPS CROP AVERAGE VALUE OF K Rice 1.10 Wheat 0.65 Maize 0.65 Sugarcane 0.90 Cotton 0.65 Potatoes 0.70 Natural vegetation: a) Very dense 1.30 b) Dense 1.20 c) Medium 1.00 d) Light 0.80 TABLE 3.4 MEAN MONTHLY SOALR RADIATION OF TOP OF ATMOSPHERE, H, in mm of evaporable water per day North Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec latitude 0° 14.5 15.0 15.2 14.7 13.9 13.4 13.5 14.2 14.9 15.0 14.6 14.3 20° 30° 10° 12.8 13.9 14.8 15.2 15.0 14.8 14.8 15.0 14.9 14.1 13.1 12.4 10.8 12.3 13.9 15.2 15.7 15.8 15.7 15.3 14.4 12.9 11.2 10.3 8.5 10.5 12.7 14.8 16.0 16.5 16.2 15.3 13.5 11.3 9.1 7.9 6.0 8.3 11.0 13.9 15.9 16.7 16.3 14.8 12.2 9.3 6.7 5.4 16.1 13.9 10.5 7.1 4.3 3.0 40° 50° 3.6 5.9 9.1 12.7 15.4 16.7 TABLE 3.5 MEAN MONTHLY VALUES OF POSSIBLE SUNSHINE HOURS, N North Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec latitude 0° 10° 20° 12.1 12.1 12.1 12.1 12.1 12.1 12.1 12.1 12.1 12.1 12.1 12.1 11.6 11.8 12.1 12.4 12.6 12.7 12.6 12.4 12.9 11.9 11.7 11.5 11.1 11.5 12.0 12.6 13.1 13.3 13.2 12.8 12.3 11.7 11.2 10.9 10.4 11.1 12.0 12.9 13.7 14.1 13.9 13.2 12.4 11.5 10.6 10.2 9.6 10.7 11.9 13.2 14.4 15.0 14.7 13.8 12.5 11.2 10.0 9.4 10.1 11.8 13.8 13.8 15.4 16.4 16.0 14.5 12.7 10.8 9.1 8.1 30° 40° 50° 8.6 TABLE 3.7 MONTHLY DAYTIME HOURS PERCENTAGES, Ph, for use in Blaney-Criddle Formula latitude Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0° 8.49 8.21 8.50 8.22 8.50 8.49 8.21 8.50 8.22 8.50 8.50 7.66 7.47 8.45 10° 8.13 7.47 8.45 8.37 8.81 8.60 8.86 15° 7.94 7.36 8.43 8.44 8.98 8.52 9.15 20⁰ 8.71 8.25 8.34 7.91 8.10 8.83 8.28 8.26 7.75 7.88 8.96 8.30 8.18 7.58 7.66 8.80 9.00 9.23 7.74 7.25 8.41 9.05 9.25 9.45 25° 7.53 7.14 8.39 8.61 9.33 9.09 8.32 8.09 7.40 7.42 30° 9.49 9.67 35° 7.30 7.03 8.38 8.72 9.53 9.22 8.33 7.99 7.19 7.15 6.88 8.35 8.83 9.76 9.77 9.93 9.37 8.36 7.87 6.97 6.86 8.95 10.02 10.08 10.22 9.54 8.39 7.75 6.72 6.52 7.05 6.88 6.76 6.72 8.33 40° Tu +
Transcribed Image Text:SATURATION VAPOUR PRESSURE OF WATER Temperature ew (°C) A A (mm/°C) 0.30 0 4.58 5.0 6.54 0.45 7.5 7.78 0.54 10.0 9.21 0.60 12.5 10.87 0.71 15.0 12.79 0.80 17.5 15.00 0.95 20.0 17.54 1.05 22.5 20.44 1.24 25.0 23.76 1.40 27.5 27.54 1.61 30.0 31.82 1.85 32.5 36.68 2.07 35.0 42.81 2.35 37.5 48.36 2.62 40.0 55.32 2.95 45.5 71.20 3.66 TABLE 3.6 VALUES OF K FOR SELECTED CROPS CROP AVERAGE VALUE OF K Rice 1.10 Wheat 0.65 Maize 0.65 Sugarcane 0.90 Cotton 0.65 Potatoes 0.70 Natural vegetation: a) Very dense 1.30 b) Dense 1.20 c) Medium 1.00 d) Light 0.80 TABLE 3.4 MEAN MONTHLY SOALR RADIATION OF TOP OF ATMOSPHERE, H, in mm of evaporable water per day North Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec latitude 0° 14.5 15.0 15.2 14.7 13.9 13.4 13.5 14.2 14.9 15.0 14.6 14.3 20° 30° 10° 12.8 13.9 14.8 15.2 15.0 14.8 14.8 15.0 14.9 14.1 13.1 12.4 10.8 12.3 13.9 15.2 15.7 15.8 15.7 15.3 14.4 12.9 11.2 10.3 8.5 10.5 12.7 14.8 16.0 16.5 16.2 15.3 13.5 11.3 9.1 7.9 6.0 8.3 11.0 13.9 15.9 16.7 16.3 14.8 12.2 9.3 6.7 5.4 16.1 13.9 10.5 7.1 4.3 3.0 40° 50° 3.6 5.9 9.1 12.7 15.4 16.7 TABLE 3.5 MEAN MONTHLY VALUES OF POSSIBLE SUNSHINE HOURS, N North Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec latitude 0° 10° 20° 12.1 12.1 12.1 12.1 12.1 12.1 12.1 12.1 12.1 12.1 12.1 12.1 11.6 11.8 12.1 12.4 12.6 12.7 12.6 12.4 12.9 11.9 11.7 11.5 11.1 11.5 12.0 12.6 13.1 13.3 13.2 12.8 12.3 11.7 11.2 10.9 10.4 11.1 12.0 12.9 13.7 14.1 13.9 13.2 12.4 11.5 10.6 10.2 9.6 10.7 11.9 13.2 14.4 15.0 14.7 13.8 12.5 11.2 10.0 9.4 10.1 11.8 13.8 13.8 15.4 16.4 16.0 14.5 12.7 10.8 9.1 8.1 30° 40° 50° 8.6 TABLE 3.7 MONTHLY DAYTIME HOURS PERCENTAGES, Ph, for use in Blaney-Criddle Formula latitude Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0° 8.49 8.21 8.50 8.22 8.50 8.49 8.21 8.50 8.22 8.50 8.50 7.66 7.47 8.45 10° 8.13 7.47 8.45 8.37 8.81 8.60 8.86 15° 7.94 7.36 8.43 8.44 8.98 8.52 9.15 20⁰ 8.71 8.25 8.34 7.91 8.10 8.83 8.28 8.26 7.75 7.88 8.96 8.30 8.18 7.58 7.66 8.80 9.00 9.23 7.74 7.25 8.41 9.05 9.25 9.45 25° 7.53 7.14 8.39 8.61 9.33 9.09 8.32 8.09 7.40 7.42 30° 9.49 9.67 35° 7.30 7.03 8.38 8.72 9.53 9.22 8.33 7.99 7.19 7.15 6.88 8.35 8.83 9.76 9.77 9.93 9.37 8.36 7.87 6.97 6.86 8.95 10.02 10.08 10.22 9.54 8.39 7.75 6.72 6.52 7.05 6.88 6.76 6.72 8.33 40° Tu +
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