Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 48.92 5.20 90.75 73.75 03Mar2018 9 a.m. 54.92 7.83 79.33 253.67 03Mar2018 10 a.m. 60.57 12.30 66.50 457.00 03Mar2018 11 a.m. 64.64 15.29 59.67 559.33 03Mar2018 12 p.m. 69.08 22.65 53.00 686.25 03Mar2018 1 p.m. 72.08 24.31 48.33 786.67 03Mar2018 2 p.m. 71.82 23.21 48.50 640.00 03Mar2018 3 p.m. 73.04 22.42 46.00 587.00 03Mar2018 4 p.m. 73.85 21.31 41.75 522.25 03Mar2018 5 p.m. 72.90 19.07 43.00 354.25 03Mar2018 6 p.m. 68.72 17.00 45.00 81.00 03Mar2018 7 p.m. 64.22 16.11 51.00 0.00 03Mar2018 8 p.m. 62.96 15.10 52.50 0.00 03Mar2018 9 p.m. 61.04 14.17 59.67 0.00 03Mar2018 10 p.m. 59.36 11.56 68.33 0.00 03Mar2018 11 p.m. 59.72 14.99 75.00 0.00 04Mar2018 12 a.m. 59.04 10.90 78.50 0.00 04Mar2018 1 a.m. 59.63 11.97 80.00 0.00 04Mar2018 2 a.m. 59.36 9.90 82.00 0.00 04Mar2018 3 a.m. 58.52 10.44 85.33 0.00 04Mar2018 4 a.m. 57.83 7.77 87.00 0.00 04Mar2018 5 a.m. 57.83 9.28 88.00 0.00 04Mar2018 6 a.m. 58.32 7.83 88.75 0.00 04Mar2018 7 a.m. 58.64 9.73 91.00 0.00 Accuml. Values 1507.01 340.34 1608.91 5001.17 Num. Valid Values 24 24 24 24 Avg. Values 62.79 14.18 67.04 208.38 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.11 547.61 67.04 430.00 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3296 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.0240 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 = 0.6517 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3483 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.4719 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 = 6.3593 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.2277 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.255 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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