Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 12.76 0.40 71.45 1.30 02Jan2018 9 a.m. 14.47 1.40 63.66 60.10 02Jan2018 10 a.m. 16.11 1.80 58.98 132.40 02Jan2018 11 a.m. 18.52 1.00 55.56 212.30 02Jan2018 12 p.m. 20.43 1.40 50.36 281.20 02Jan2018 1 p.m. 21.60 2.70 48.27 237.20 02Jan2018 2 p.m. 22.39 2.80 42.79 139.80 02Jan2018 3 p.m. 23.68 4.30 42.64 87.40 02Jan2018 4 p.m. 24.03 10.00 41.53 42.20 02Jan2018 5 p.m. 24.10 10.70 39.69 12.10 02Jan2018 6 p.m. 24.06 10.70 43.73 0.00 02Jan2018 7 p.m. 34.02 3.70 52.16 0.00 02Jan2018 8 p.m. 23.34 7.30 39.11 0.00 02Jan2018 9 p.m. 23.23 3.60 39.52 0.00 02Jan2018 10 p.m. 21.15 0.60 43.63 0.00 02Jan2018 11 p.m. 20.43 0.10 46.48 0.00 03Jan2018 12 a.m. 17.92 1.60 51.65 0.00 03Jan2018 1 a.m. 14.81 0.40 60.52 0.00 03Jan2018 2 a.m. 15.22 0.30 63.45 0.00 03Jan2018 3 a.m. 16.57 0.90 61.27 0.00 03Jan2018 4 a.m. 13.39 1.60 67.51 0.00 03Jan2018 5 a.m. 16.63 0.30 63.52 0.00 03Jan2018 6 a.m. 13.23 4.30 68.09 0.00 03Jan2018 7 a.m. 11.08 0.40 75.14 0.00 Accuml. Values 463.15 72.30 1290.71 1206.00 Num. Valid Values 24 24 24 24 Avg. Values 19.30 3.01 53.78 50.25 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.06 116.33 53.78 103.69 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4622 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.8634 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 = 0.2978 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7022 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1963 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 = 1.6824 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1971 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.031 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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