Detailed Weather Data for Project:  KEYS

Date       Time       TAIR     WSPD     RELH     SRAD
17Mar2018  8 a.m.    41.67    12.21    70.16     6.00
17Mar2018  9 a.m.    41.45    10.76    69.98    83.00
17Mar2018 10 a.m.    41.88    10.75    66.87   211.00
17Mar2018 11 a.m.    43.86     7.99    62.71   633.00
17Mar2018 12 p.m.    46.17     6.24    60.76   798.00
17Mar2018  1 p.m.    49.80     5.38    55.75   851.00
17Mar2018  2 p.m.    54.09     5.50    46.71   708.00
17Mar2018  3 p.m.    56.73     4.55    42.26   505.00
17Mar2018  4 p.m.    58.14     5.25    38.04   474.00
17Mar2018  5 p.m.    61.34     2.39    33.46   296.00
17Mar2018  6 p.m.    61.77     3.95    32.60   169.00
17Mar2018  7 p.m.    61.11     3.88    34.62    66.00
17Mar2018  8 p.m.    58.15     6.93    82.62     8.00
17Mar2018  9 p.m.    57.61     5.65    41.46     0.00
17Mar2018 10 p.m.    56.28     5.67    44.69     0.00
17Mar2018 11 p.m.    55.40     4.14    45.37     0.00
18Mar2018 12 a.m.    52.75     2.52    51.47     0.00
18Mar2018  1 a.m.    51.87     4.67    54.16     1.00
18Mar2018  2 a.m.    49.35     7.61    62.22     0.00
18Mar2018  3 a.m.    46.83     4.34    66.32     0.00
18Mar2018  4 a.m.    45.50     4.25    70.09     0.00
18Mar2018  5 a.m.    44.74     5.60    72.42     1.00
18Mar2018  6 a.m.    44.31     5.96    72.73     1.00
18Mar2018  7 a.m.    43.09     5.88    75.96     1.00

Accuml.
 Values            1223.90   142.07  1353.43  4812.00
Num. Valid
 Values                 24       24       24       24
Avg. Values          51.00     5.92    56.39   200.50

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

Converted Values     10.55   228.59    56.39   413.74

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

  xcompl = 0.4361   
   definition: xcompl = 1 - (RELH_avg/100)

  TdC =    2.2698   
   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 =    0.5632   
   definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)

  del_lambda2 =    0.4368   
   definition: del_lambda2 = 1 - del_lambda1

  Qn =    3.7365   
   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 =    5.5587   
   definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))

  Ea =    4.8997   
   definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)

Daily Evap:    0.167 inches
   definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4