Detailed Weather Data for Project:  KEYS

Date       Time       TAIR     WSPD     RELH     SRAD
23Sep2018  8 a.m.    63.75     4.00    99.89     0.00
23Sep2018  9 a.m.    64.15     5.00    97.97    21.90
23Sep2018 10 a.m.    64.81     5.10    95.63    71.70
23Sep2018 11 a.m.    66.27     5.40    86.56   120.30
23Sep2018 12 p.m.    66.74     6.60    85.05   170.60
23Sep2018  1 p.m.    67.69     6.30    83.54   168.00
23Sep2018  2 p.m.    68.74     5.40    81.05   168.60
23Sep2018  3 p.m.    69.89     4.80    79.06   175.00
23Sep2018  4 p.m.    71.24     3.20    77.35   118.60
23Sep2018  5 p.m.    71.85     1.80    76.81    76.80
23Sep2018  6 p.m.    72.01     1.80    77.92    32.60
23Sep2018  7 p.m.    72.05     0.70    79.42     2.10
23Sep2018  8 p.m.    76.42     5.00    82.39     0.00
23Sep2018  9 p.m.    71.40     3.80    81.45     0.00
23Sep2018 10 p.m.    71.10     2.00    83.86     0.00
23Sep2018 11 p.m.    70.83     3.00    84.50     0.00
24Sep2018 12 a.m.    70.90     2.90    83.70     0.00
24Sep2018  1 a.m.    70.77     4.10    85.42     0.00
24Sep2018  2 a.m.    70.79     4.20    87.09     0.00
24Sep2018  3 a.m.    69.89     4.90    91.13     0.00
24Sep2018  4 a.m.    70.00     3.70    92.68     0.00
24Sep2018  5 a.m.    69.89     3.50    93.65     0.00
24Sep2018  6 a.m.    69.51     3.30    94.52     0.00
24Sep2018  7 a.m.    69.06     4.40    95.37     0.00

Accuml.
 Values            1669.76    94.90  2076.01  1126.20
Num. Valid
 Values                 24       24       24       24
Avg. Values          69.57     3.95    86.50    46.92

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

Converted Values     20.87   152.69    86.50    96.83

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

  xcompl = 0.1350   
   definition: xcompl = 1 - (RELH_avg/100)

  TdC =   18.5432   
   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 =    0.6968   
   definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)

  del_lambda2 =    0.3032   
   definition: del_lambda2 = 1 - del_lambda1

  Qn =    0.1778   
   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 =    3.3202   
   definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))

  Ea =    2.4805   
   definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)

Daily Evap:    0.034 inches
   definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4