Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 53.38 2.60 91.27 24.10 05Mar2018 9 a.m. 55.26 2.50 88.91 131.80 05Mar2018 10 a.m. 59.99 5.00 77.44 316.70 05Mar2018 11 a.m. 62.31 10.20 53.07 613.20 05Mar2018 12 p.m. 63.64 10.80 38.48 715.80 05Mar2018 1 p.m. 66.16 10.40 29.22 763.10 05Mar2018 2 p.m. 66.36 11.20 23.80 715.90 05Mar2018 3 p.m. 65.61 10.40 21.48 641.50 05Mar2018 4 p.m. 64.08 10.60 22.39 506.10 05Mar2018 5 p.m. 63.86 8.90 17.95 294.90 05Mar2018 6 p.m. 62.35 6.30 15.33 85.40 05Mar2018 7 p.m. 54.27 17.10 23.35 0.10 05Mar2018 8 p.m. 56.28 2.60 19.82 0.00 05Mar2018 9 p.m. 54.18 2.60 21.88 0.00 05Mar2018 10 p.m. 49.37 1.00 28.31 0.00 05Mar2018 11 p.m. 44.65 1.10 39.71 0.00 06Mar2018 12 a.m. 41.58 0.70 61.42 0.00 06Mar2018 1 a.m. 39.70 0.40 66.80 0.00 06Mar2018 2 a.m. 39.94 0.60 70.45 0.00 06Mar2018 3 a.m. 38.05 0.60 68.12 0.00 06Mar2018 4 a.m. 38.21 0.80 67.52 0.00 06Mar2018 5 a.m. 36.21 0.90 71.61 0.00 06Mar2018 6 a.m. 35.55 1.50 80.27 0.00 06Mar2018 7 a.m. 34.39 0.90 82.06 0.60 Accuml. Values 1245.38 119.70 1180.66 4809.20 Num. Valid Values 24 24 24 24 Avg. Values 51.89 4.99 49.19 200.38 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.05 192.60 49.19 413.50 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5081 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.7716 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 = 0.5703 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4297 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.7693 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 = 6.7246 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.2350 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.173 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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