Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 64.31 14.51 100.27 105.00 05Mar2018 9 a.m. 63.88 14.15 100.10 251.00 05Mar2018 10 a.m. 67.73 17.22 63.58 464.00 05Mar2018 11 a.m. 63.21 17.59 35.85 725.00 05Mar2018 12 p.m. 64.74 18.19 24.67 828.00 05Mar2018 1 p.m. 65.86 17.79 21.13 864.00 05Mar2018 2 p.m. 66.40 15.98 20.03 822.00 05Mar2018 3 p.m. 65.28 14.46 15.45 663.00 05Mar2018 4 p.m. 65.19 13.35 14.11 499.00 05Mar2018 5 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 6 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 7 p.m. 57.70 13.30 5.66 0.00 05Mar2018 8 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 9 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 10 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 11 p.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 12 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 1 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 2 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 3 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 4 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 5 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 6 a.m. -901.00 -901.00 -901.00 -901.00 06Mar2018 7 a.m. 38.97 3.60 40.16 0.00 Accuml. Values 683.27 160.14 441.01 5221.00 Num. Valid Values 11 11 11 11 Avg. Values 62.12 14.56 40.09 474.64 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 16.73 562.18 40.09 979.42 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5991 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.0038 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 = 0.6470 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3530 definition: del_lambda2 = 1 - del_lambda1 Qn = 13.4205 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 = 11.4777 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 17.5587 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.586 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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