Detailed Weather Data for Project:  KEYS

Date       Time       TAIR     WSPD     RELH     SRAD
13Jul2018  8 a.m.    76.26     2.85    85.90   140.00
13Jul2018  9 a.m.    77.92     2.92    82.00   312.00
13Jul2018 10 a.m.    78.80     3.16    79.06   277.00
13Jul2018 11 a.m.    82.87     3.92    69.06   730.00
13Jul2018 12 p.m.    86.04     5.80    59.89   900.00
13Jul2018  1 p.m.    87.60     5.75    52.39   953.00
13Jul2018  2 p.m.    89.35     7.49    52.44   949.00
13Jul2018  3 p.m.    90.55     6.69    48.60   715.00
13Jul2018  4 p.m.    91.98     4.97    45.73   812.00
13Jul2018  5 p.m.    93.18     5.69    43.96   661.00
13Jul2018  6 p.m.    92.53     5.69    45.97   485.00
13Jul2018  7 p.m.    92.43     6.60    47.56   311.00
13Jul2018  8 p.m.    83.08     3.05    81.44    81.00
13Jul2018  9 p.m.    88.68     3.64    56.41    16.00
13Jul2018 10 p.m.    85.17     1.61    63.92     0.00
13Jul2018 11 p.m.    84.07     2.46    66.79     0.00
14Jul2018 12 a.m.    84.07     3.34    65.03     0.00
14Jul2018  1 a.m.    82.20     4.69    70.09     1.00
14Jul2018  2 a.m.    82.31     2.96    70.27     0.00
14Jul2018  3 a.m.    80.76     3.49    74.36     0.00
14Jul2018  4 a.m.    81.00     2.39    74.79     0.00
14Jul2018  5 a.m.    80.01     2.14    80.89     0.00
14Jul2018  6 a.m.    79.23     7.37    87.30     0.00
14Jul2018  7 a.m.    76.82    11.16    91.64     2.00

Accuml.
 Values            2026.92   109.83  1595.49  7345.00
Num. Valid
 Values                 24       24       24       24
Avg. Values          84.45     4.58    66.48   306.04

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

Converted Values     29.14   176.72    66.48   631.52

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

  xcompl = 0.3352   
   definition: xcompl = 1 - (RELH_avg/100)

  TdC =   22.4060   
   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 =    0.7795   
   definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)

  del_lambda2 =    0.2205   
   definition: del_lambda2 = 1 - del_lambda1

  Qn =    9.0396   
   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 =   13.2806   
   definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))

  Ea =    9.0797   
   definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)

Daily Evap:    0.356 inches
   definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4