Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 52.00 4.44 90.38 12.00 04Mar2018 9 a.m. 51.57 4.65 96.79 25.00 04Mar2018 10 a.m. 53.44 5.65 84.15 54.00 04Mar2018 11 a.m. 52.56 11.05 94.22 54.00 04Mar2018 12 p.m. 52.21 6.32 97.89 75.00 04Mar2018 1 p.m. 52.66 7.62 99.05 119.00 04Mar2018 2 p.m. 55.18 10.61 93.37 356.00 04Mar2018 3 p.m. 55.74 7.48 93.80 153.00 04Mar2018 4 p.m. 56.52 6.41 90.94 128.00 04Mar2018 5 p.m. 56.07 9.19 89.83 117.00 04Mar2018 6 p.m. 55.96 8.42 92.76 12.00 04Mar2018 7 p.m. 55.29 11.10 96.85 -2.00 04Mar2018 8 p.m. 56.30 7.17 91.36 -2.00 04Mar2018 9 p.m. 56.39 6.43 92.39 -2.00 04Mar2018 10 p.m. 55.63 4.58 96.36 -2.00 04Mar2018 11 p.m. 56.17 6.14 88.54 -2.00 05Mar2018 12 a.m. 56.84 7.71 85.43 -2.00 05Mar2018 1 a.m. 56.95 4.59 87.32 -2.00 05Mar2018 2 a.m. 57.94 6.90 89.89 -2.00 05Mar2018 3 a.m. 58.95 8.46 95.70 -2.00 05Mar2018 4 a.m. 59.14 5.84 98.93 -2.00 05Mar2018 5 a.m. 60.80 9.12 99.41 -3.00 05Mar2018 6 a.m. 62.56 8.11 100.04 -2.00 05Mar2018 7 a.m. 64.31 13.06 100.09 4.00 Accuml. Values 1351.18 181.05 2245.49 1084.00 Num. Valid Values 24 24 24 24 Avg. Values 56.30 7.54 93.56 45.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.50 291.31 93.56 93.20 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0644 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.4591 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 = 0.6045 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3955 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0142 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 = 1.0183 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.2852 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.020 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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