Detailed Weather Data for Project:  KEYS

Date       Time       TAIR     WSPD     RELH     SRAD
12Jul2018  8 a.m.    79.90     3.55    82.91   181.00
12Jul2018  9 a.m.    83.52     2.70    74.42   376.00
12Jul2018 10 a.m.    87.03     2.45    66.00   567.00
12Jul2018 11 a.m.    89.24     3.72    60.51   733.00
12Jul2018 12 p.m.    90.55     5.95    53.72   857.00
12Jul2018  1 p.m.    91.98     5.15    51.95   785.00
12Jul2018  2 p.m.    94.39     6.00    42.49   920.00
12Jul2018  3 p.m.    95.27     6.00    37.91   791.00
12Jul2018  4 p.m.    95.16     6.34    37.36   795.00
12Jul2018  5 p.m.    96.04     5.60    34.86   671.00
12Jul2018  6 p.m.    96.04     4.95    38.10   500.00
12Jul2018  7 p.m.    95.27     5.93    38.40   321.00
12Jul2018  8 p.m.    91.33     4.82    52.63   122.00
12Jul2018  9 p.m.    88.90     6.22    45.42    16.00
12Jul2018 10 p.m.    86.59     3.83    49.39     0.00
12Jul2018 11 p.m.    83.95     3.70    62.45     0.00
13Jul2018 12 a.m.    82.63     3.77    68.25     0.00
13Jul2018  1 a.m.    81.10     2.99    73.02     0.00
13Jul2018  2 a.m.    79.34     1.33    77.17     0.00
13Jul2018  3 a.m.    77.68     2.28    81.38     0.00
13Jul2018  4 a.m.    77.25     0.22    87.06     0.00
13Jul2018  5 a.m.    74.84     2.03    92.98     0.00
13Jul2018  6 a.m.    73.85     2.01    95.54     0.00
13Jul2018  7 a.m.    74.52     4.70    93.17    24.00

Accuml.
 Values            2066.38    96.24  1497.09  7659.00
Num. Valid
 Values                 24       24       24       24
Avg. Values          86.10     4.01    62.38   319.13

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

Converted Values     30.06   154.85    62.38   658.52

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

  xcompl = 0.3762   
   definition: xcompl = 1 - (RELH_avg/100)

  TdC =   22.2319   
   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 =    0.7873   
   definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)

  del_lambda2 =    0.2127   
   definition: del_lambda2 = 1 - del_lambda1

  Qn =    9.6466   
   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 =   15.7457   
   definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))

  Ea =    9.8300   
   definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)

Daily Evap:    0.381 inches
   definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4