Detailed Weather Data for Project:  KEYS

Date       Time       TAIR     WSPD     RELH     SRAD
18Mar2018  8 a.m.    42.87     5.51    76.57     5.00
18Mar2018  9 a.m.    44.29     6.27    73.39   185.00
18Mar2018 10 a.m.    49.14     6.99    63.39   428.00
18Mar2018 11 a.m.    52.97     5.37    56.60   396.00
18Mar2018 12 p.m.    56.82     8.04    51.53   601.00
18Mar2018  1 p.m.    61.23     6.36    46.90   432.00
18Mar2018  2 p.m.    63.21     4.92    45.62   230.00
18Mar2018  3 p.m.    65.39     6.45    48.91   239.00
18Mar2018  4 p.m.    64.42     5.80    54.53   123.00
18Mar2018  5 p.m.    61.00     1.86    74.61    67.00
18Mar2018  6 p.m.    62.76     4.84    68.14   196.00
18Mar2018  7 p.m.    60.01     7.63    77.05    74.00
18Mar2018  8 p.m.    46.62    19.31    81.16     4.00
18Mar2018  9 p.m.    55.94     7.96    87.19     0.00
18Mar2018 10 p.m.    55.62     8.70    93.42     0.00
18Mar2018 11 p.m.    56.39     8.67    89.57     0.00
19Mar2018 12 a.m.    56.39    11.16    82.12     0.00
19Mar2018  1 a.m.    55.96    10.27    87.81     0.00
19Mar2018  2 a.m.    55.62    10.98    94.52     0.00
19Mar2018  3 a.m.    55.40    11.80    98.80     0.00
19Mar2018  4 a.m.    55.62    13.56    97.57     0.00
19Mar2018  5 a.m.    57.94     7.38    83.54     1.00
19Mar2018  6 a.m.    57.16     8.21    43.54     0.00
19Mar2018  7 a.m.    54.30     8.82    38.65     0.00

Accuml.
 Values            1347.06   196.86  1715.13  2981.00
Num. Valid
 Values                 24       24       24       24
Avg. Values          56.13     8.20    71.46   124.21

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

Converted Values     13.40   316.75    71.46   256.31

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

  xcompl = 0.2854   
   definition: xcompl = 1 - (RELH_avg/100)

  TdC =    8.4106   
   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 =    0.6032   
   definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)

  del_lambda2 =    0.3968   
   definition: del_lambda2 = 1 - del_lambda1

  Qn =    1.9021   
   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 =    4.3492   
   definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))

  Ea =    4.8802   
   definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)

Daily Evap:    0.121 inches
   definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4