Detailed Weather Data for Project:  KEYS

Date       Time       TAIR     WSPD     RELH     SRAD
14Jul2018  8 a.m.    76.93     1.81    94.57    36.00
14Jul2018  9 a.m.    76.17     2.11   100.38   110.00
14Jul2018 10 a.m.    79.77     1.26    96.89   360.00
14Jul2018 11 a.m.    84.31     1.46    73.64   394.00
14Jul2018 12 p.m.    86.05     1.92    68.02   707.00
14Jul2018  1 p.m.    91.00     1.23    56.60   935.00
14Jul2018  2 p.m.    92.30     1.18    48.41   617.00
14Jul2018  3 p.m.    84.29     5.10    74.30   440.00
14Jul2018  4 p.m.    81.12     5.75    76.81    75.00
14Jul2018  5 p.m.    81.64     1.04    75.89    79.00
14Jul2018  6 p.m.    81.23     4.89    82.79   162.00
14Jul2018  7 p.m.    82.76     3.69    78.58   139.00
14Jul2018  8 p.m.    89.80     1.49    69.24    63.00
14Jul2018  9 p.m.    81.10     3.40    92.80    14.00
14Jul2018 10 p.m.    80.22     3.96    92.80     0.00
14Jul2018 11 p.m.    79.03     3.94    95.74     0.00
15Jul2018 12 a.m.    78.04     4.12    99.10     0.00
15Jul2018  1 a.m.    79.68     4.94   100.38     0.00
15Jul2018  2 a.m.    74.41    12.40   100.38     0.00
15Jul2018  3 a.m.    73.74     6.54   100.31     0.00
15Jul2018  4 a.m.    74.08     3.31   100.44     0.00
15Jul2018  5 a.m.    75.16     8.02   100.31     0.00
15Jul2018  6 a.m.    76.48     5.58    98.60     0.00
15Jul2018  7 a.m.    75.72     4.51   100.32     3.00

Accuml.
 Values            1935.07    93.65  2077.30  4134.00
Num. Valid
 Values                 24       24       24       24
Avg. Values          80.63     3.90    86.55   172.25

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

Converted Values     27.02   150.68    86.55   355.44

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

  xcompl = 0.1345   
   definition: xcompl = 1 - (RELH_avg/100)

  TdC =   24.5977   
   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 =    0.7604   
   definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1)

  del_lambda2 =    0.2396   
   definition: del_lambda2 = 1 - del_lambda1

  Qn =    4.1875   
   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 =    4.7571   
   definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8))

  Ea =    3.3809   
   definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg)

Daily Evap:    0.157 inches
   definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4