Detailed Weather Data for Project:  KEYS

Date       Time       TAIR     WSPD     RELH     SRAD
22Sep2018  8 a.m.    59.47     6.00    86.42     3.40
22Sep2018  9 a.m.    59.86     6.50    87.19   125.10
22Sep2018 10 a.m.    61.52     9.00    85.17   400.70
22Sep2018 11 a.m.    63.68    10.20    81.20   598.90
22Sep2018 12 p.m.    65.08     9.60    79.30   568.70
22Sep2018  1 p.m.    67.73     8.60    74.69   537.30
22Sep2018  2 p.m.    69.04     9.70    72.95   558.00
22Sep2018  3 p.m.    69.96     9.40    72.09   366.70
22Sep2018  4 p.m.    70.99     8.70    71.19   202.40
22Sep2018  5 p.m.    71.17     8.10    71.06   166.90
22Sep2018  6 p.m.    71.29     7.00    71.94    86.70
22Sep2018  7 p.m.    71.08     7.10    72.65    34.80
22Sep2018  8 p.m.    71.49     0.70    81.29     0.00
22Sep2018  9 p.m.    69.49     6.10    76.98     0.00
22Sep2018 10 p.m.    68.88     7.60    77.78     0.00
22Sep2018 11 p.m.    67.82     8.20    79.80     0.00
23Sep2018 12 a.m.    66.45     7.50    82.55     0.00
23Sep2018  1 a.m.    65.25     6.40    86.04     0.00
23Sep2018  2 a.m.    65.28     4.00    87.09     0.00
23Sep2018  3 a.m.    65.03     5.60    88.70     0.00
23Sep2018  4 a.m.    64.06     4.00    95.93     0.00
23Sep2018  5 a.m.    63.61     3.30   100.03     0.00
23Sep2018  6 a.m.    63.73     3.70   100.06     0.00
23Sep2018  7 a.m.    63.75     3.30   100.05     0.00

Accuml.
 Values            1595.73   160.30  1982.15  3649.60
Num. Valid
 Values                 24       24       24       24
Avg. Values          66.49     6.68    82.59   152.07

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

Converted Values     19.16   257.92    82.59   313.79

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

  xcompl = 0.1741   
   definition: xcompl = 1 - (RELH_avg/100)

  TdC =   16.1505   
   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 =    0.6769   
   definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)

  del_lambda2 =    0.3231   
   definition: del_lambda2 = 1 - del_lambda1

  Qn =    2.9850   
   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 =    3.8336   
   definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))

  Ea =    3.8108   
   definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)

Daily Evap:    0.128 inches
   definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4