Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 63.82 7.53 81.34 23.08 05Mar2018 9 a.m. 58.57 12.72 72.66 149.54 05Mar2018 10 a.m. 53.15 11.83 58.66 358.61 05Mar2018 11 a.m. 56.35 15.16 42.76 604.16 05Mar2018 12 p.m. 57.04 14.30 38.97 705.70 05Mar2018 1 p.m. 57.02 13.36 35.62 737.84 05Mar2018 2 p.m. 57.60 13.56 31.49 685.58 05Mar2018 3 p.m. 59.27 12.51 20.44 620.11 05Mar2018 4 p.m. 60.10 12.97 15.04 483.13 05Mar2018 5 p.m. 60.01 11.40 14.04 303.69 05Mar2018 6 p.m. 58.71 10.97 15.24 86.10 05Mar2018 7 p.m. 41.45 19.03 45.93 0.17 05Mar2018 8 p.m. 53.58 5.12 21.28 0.00 05Mar2018 9 p.m. 51.73 3.08 22.20 0.00 05Mar2018 10 p.m. 49.59 2.19 27.45 0.00 05Mar2018 11 p.m. 46.00 1.90 38.00 0.00 06Mar2018 12 a.m. 44.58 2.07 40.78 0.00 06Mar2018 1 a.m. 43.47 1.12 46.48 0.00 06Mar2018 2 a.m. 42.94 1.80 43.01 0.00 06Mar2018 3 a.m. 41.95 2.26 47.26 0.00 06Mar2018 4 a.m. 41.11 2.77 45.73 0.00 06Mar2018 5 a.m. 40.62 3.04 42.65 0.00 06Mar2018 6 a.m. 38.48 1.83 49.96 0.00 06Mar2018 7 a.m. 38.50 2.18 48.12 0.95 Accuml. Values 1215.64 184.70 945.11 4758.66 Num. Valid Values 24 24 24 24 Avg. Values 50.65 7.70 39.38 198.28 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.36 297.18 39.38 409.15 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6062 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.9824 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 = 0.5604 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4396 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.6629 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 = 7.6978 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.7238 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.214 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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