Detailed Weather Data for Project:  KEYS

Date       Time       TAIR     WSPD     RELH     SRAD
14Jan2018  8 a.m.    28.49     5.06    50.14     5.00
14Jan2018  9 a.m.    30.25     4.47    48.25    72.00
14Jan2018 10 a.m.    33.89     5.26    43.86   188.00
14Jan2018 11 a.m.    35.53     6.24    43.18   242.00
14Jan2018 12 p.m.    39.70     6.61    37.80   558.00
14Jan2018  1 p.m.    42.22     8.69    35.36   596.00
14Jan2018  2 p.m.    43.11     8.66    35.67    62.00
14Jan2018  3 p.m.    46.63     6.43    30.78    99.00
14Jan2018  4 p.m.    47.73     9.34    33.16   268.00
14Jan2018  5 p.m.    48.06     8.30    33.41   139.00
14Jan2018  6 p.m.    45.19     5.80    38.72    15.00
14Jan2018  7 p.m.    18.48    15.29    64.68     0.00
14Jan2018  8 p.m.    43.11     2.52    38.90     0.00
14Jan2018  9 p.m.    39.49     2.15    47.58     0.00
14Jan2018 10 p.m.    38.37     3.90    50.32     0.00
14Jan2018 11 p.m.    38.48     4.29    46.96     0.00
15Jan2018 12 a.m.    37.72     2.90    49.35     0.00
15Jan2018  1 a.m.    40.03     3.02    45.74     0.00
15Jan2018  2 a.m.    40.14     4.08    46.71     0.00
15Jan2018  3 a.m.    39.36     2.48    47.88     0.00
15Jan2018  4 a.m.    38.26     2.16    53.32     0.00
15Jan2018  5 a.m.    39.15     9.24    52.46     0.00
15Jan2018  6 a.m.    37.83     0.66    64.74     0.00
15Jan2018  7 a.m.    40.14     5.59    69.81     0.00

Accuml.
 Values             931.37   133.14  1108.78  2244.00
Num. Valid
 Values                 24       24       24       24
Avg. Values          38.81     5.55    46.20    93.50

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

Converted Values      3.78   214.22    46.20   192.94

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

  xcompl = 0.5380   
   definition: xcompl = 1 - (RELH_avg/100)

  TdC =   -6.7924   
   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 =    0.4619   
   definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)

  del_lambda2 =    0.5381   
   definition: del_lambda2 = 1 - del_lambda1

  Qn =    0.8203   
   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 =    4.3558   
   definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))

  Ea =    3.8013   
   definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)

Daily Evap:    0.095 inches
   definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4