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#1 The maximum and minimum temperature recorded at a Lake is 18°C and 15°C in February. The mean air temperature (T), pan evaporation (EP), wind speed (uz), relative humidity (RH), and net radiation (Rn) in a nearby weather station were found to be 23°C, 15 mm/day, 23 m/s, 47%, 20.54 MJ/m²/day, respectively. Estimate Lake evaporation (mm/day) using: (b) Aerodynamic method, Data you may need: (19.65 T Saturation vapor pressure, es = 611 e 273+T) where T is temperature in °C and e, in Pa (You can also use table to read off the value of e, from internet or textbook (Table 2.9 or Appendix A) Assume, Pan Coefficient = 0.7 Bulk evaporation coefficient, CE = 1.3×10-3 Vapor pressure at elevation Z; ez = RH*es Atmospheric pressure at sea level = 101.3 kPa Density of air = 1.19 kg/m³ and for water = 1000 kg/m³ Bowen ratio = 0.1 Latent heat of vaporization (2) = 2.447 MJ/kg Disregard the soil head index (G= 0) Constants for the Penman method (Table 2.9): at 23°C, A = 0.17 and y = 0.0669 kPa/°C

#1 The maximum and minimum temperature recorded at a Lake is 18°C and 15°C in February. The mean air temperature (T), pan evaporation (EP), wind speed (uz), relative humidity (RH), and net radiation (Rn) in a nearby weather station were found to be 23°C, 15 mm/day, 23 m/s, 47%, 20.54 MJ/m²/day, respectively. Estimate Lake evaporation (mm/day) using: (b) Aerodynamic method, Data you may need: (19.65 T Saturation vapor pressure, es = 611 e 273+T) where T is temperature in °C and e, in Pa (You can also use table to read off the value of e, from internet or textbook (Table 2.9 or Appendix A) Assume, Pan Coefficient = 0.7 Bulk evaporation coefficient, CE = 1.3×10-3 Vapor pressure at elevation Z; ez = RH*es Atmospheric pressure at sea level = 101.3 kPa Density of air = 1.19 kg/m³ and for water = 1000 kg/m³ Bowen ratio = 0.1 Latent heat of vaporization (2) = 2.447 MJ/kg Disregard the soil head index (G= 0) Constants for the Penman method (Table 2.9): at 23°C, A = 0.17 and y = 0.0669 kPa/°C

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Aerodynamic Method
#1 The maximum and minimum temperature recorded at a Lake is 18°C and 15°C in February. The mean air temperature (T), pan evaporation (Ep), wind speed (uz), relative humidity (RH), and net radiation (Rn) in a nearby weather station were found to be 23°C, 15 mm/day, 23 m/s, 47%, 20.54 MJ/m²/day, respectively. Estimate Lake evaporation (mm/day) using: (b) Aerodynamic method, Data you may need: (19.65 T Saturation vapor pressure, es = 611 e (2347) where T is temperature in °C and e, in Pa (You can also use table to read off the value of e, from internet or textbook (Table 2.9 or Appendix A) Assume, Pan Coefficient = 0.7 Bulk evaporation coefficient, CE = 1.3×10-3 Vapor pressure at elevation Z; ez = RH*es Atmospheric pressure at sea level = 101.3 kPa Density of air = 1.19 kg/m³ and for water = 1000 kg/m³ Bowen ratio = 0.1 Latent heat of vaporization (2) = 2.447 MJ/kg Disregard the soil head index (G= 0) Constants for the Penman method (Table 2.9): at 23°C, A = 0.17 and y = 0.0669 kPa/°C
Transcribed Image Text:#1 The maximum and minimum temperature recorded at a Lake is 18°C and 15°C in February. The mean air temperature (T), pan evaporation (Ep), wind speed (uz), relative humidity (RH), and net radiation (Rn) in a nearby weather station were found to be 23°C, 15 mm/day, 23 m/s, 47%, 20.54 MJ/m²/day, respectively. Estimate Lake evaporation (mm/day) using: (b) Aerodynamic method, Data you may need: (19.65 T Saturation vapor pressure, es = 611 e (2347) where T is temperature in °C and e, in Pa (You can also use table to read off the value of e, from internet or textbook (Table 2.9 or Appendix A) Assume, Pan Coefficient = 0.7 Bulk evaporation coefficient, CE = 1.3×10-3 Vapor pressure at elevation Z; ez = RH*es Atmospheric pressure at sea level = 101.3 kPa Density of air = 1.19 kg/m³ and for water = 1000 kg/m³ Bowen ratio = 0.1 Latent heat of vaporization (2) = 2.447 MJ/kg Disregard the soil head index (G= 0) Constants for the Penman method (Table 2.9): at 23°C, A = 0.17 and y = 0.0669 kPa/°C
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