Detailed Weather Data for Project:  KEYS

Date       Time       TAIR     WSPD     RELH     SRAD
10Jul2018  8 a.m.    77.49     2.20    92.87   174.00
10Jul2018  9 a.m.    83.43     0.24    75.34   376.00
10Jul2018 10 a.m.    83.30     1.57    75.82   562.00
10Jul2018 11 a.m.    84.72     2.28    69.35   736.00
10Jul2018 12 p.m.    86.38     3.72    65.14   782.00
10Jul2018  1 p.m.    89.80     3.10    56.11   925.00
10Jul2018  2 p.m.    92.53     2.11    50.73   962.00
10Jul2018  3 p.m.    93.40     0.77    47.01   940.00
10Jul2018  4 p.m.    93.85     2.08    43.35   748.00
10Jul2018  5 p.m.    94.06     1.06    42.37   668.00
10Jul2018  6 p.m.    93.96     1.81    43.77   477.00
10Jul2018  7 p.m.    92.19     4.89    49.45   298.00
10Jul2018  8 p.m.    91.31     5.88    55.56    98.00
10Jul2018  9 p.m.    88.36     3.46    60.07    16.00
10Jul2018 10 p.m.    85.50     0.68    68.25     0.00
10Jul2018 11 p.m.    82.85     1.92    76.31     1.00
11Jul2018 12 a.m.    81.10     2.08    81.75     0.00
11Jul2018  1 a.m.    82.09     1.30    78.51     0.00
11Jul2018  2 a.m.    79.02     1.86    90.42     0.00
11Jul2018  3 a.m.    80.20     0.12    85.52     0.00
11Jul2018  4 a.m.    79.34     1.06    86.94     0.00
11Jul2018  5 a.m.    79.66     0.51    86.69     0.00
11Jul2018  6 a.m.    75.83     1.92    98.05     0.00
11Jul2018  7 a.m.    76.28     2.48    98.06    29.00

Accuml.
 Values            2046.65    49.10  1677.44  7792.00
Num. Valid
 Values                 24       24       24       24
Avg. Values          85.28     2.05    69.89   324.67

 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS:
SRAD  == CAL / SQUARE CENTIMETER
WSPD  == KILOMETERS PER DAY
TAIR  == DEGREES CELSIUS
RELH  == PERCENT  

Converted Values     29.60    79.00    69.89   669.96

Now start computations towards evaporation in inches per day
Each intermediate calculation step will be shown.

  xcompl = 0.3011   
   definition: xcompl = 1 - (RELH_avg/100)

  TdC =   23.6605   
   definition: TdC = TAIR_avg -  ((14.55 + (0.114*TAIR_avg))*xcompl +pow((2.5 + 0.007*TAIR_avg)*xcompl, 3) + (15.9 +0.117*TAIR_avg)*pow(xcompl, 14))

  del_lambda1 =    0.7835   
   definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)

  del_lambda2 =    0.2165   
   definition: del_lambda2 = 1 - del_lambda1

  Qn =    9.7879   
   definition: Qn = 0.00714*SRAD_avg + 0.00000526*SRAD_avg*pow(TAIR_avg+17.8, 1.87) +0.00000394*pow(SRAD_avg, 2) - 0.00000000239*pow(SRAD_avg, 2)*pow(TAIR_avg-7.2, 2) - 1.02

  es_ea =   12.2239   
   definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))

  Ea =    5.8757   
   definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)

Daily Evap:    0.352 inches
   definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4