Detailed Weather Data for Project: ELDR

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 7.95 5.60 63.87 0.00 02Jan2018 9 a.m. 8.56 4.10 59.40 38.30 02Jan2018 10 a.m. 9.97 2.00 56.05 146.60 02Jan2018 11 a.m. 13.44 1.80 46.61 226.50 02Jan2018 12 p.m. 15.73 3.00 41.12 269.80 02Jan2018 1 p.m. 18.48 3.70 36.72 311.20 02Jan2018 2 p.m. 20.52 3.60 35.07 325.40 02Jan2018 3 p.m. 21.42 4.00 33.76 314.20 02Jan2018 4 p.m. 23.34 3.70 31.54 272.50 02Jan2018 5 p.m. 24.40 4.40 31.15 128.50 02Jan2018 6 p.m. 22.32 3.30 35.54 0.70 02Jan2018 7 p.m. 28.35 5.10 54.59 0.00 02Jan2018 8 p.m. 18.97 3.50 43.02 0.00 02Jan2018 9 p.m. 18.66 4.40 44.16 0.00 02Jan2018 10 p.m. 18.27 4.50 45.52 0.00 02Jan2018 11 p.m. 17.35 4.00 48.33 0.00 03Jan2018 12 a.m. 17.67 4.40 49.38 0.00 03Jan2018 1 a.m. 17.92 4.00 50.17 0.10 03Jan2018 2 a.m. 17.76 3.20 51.64 0.00 03Jan2018 3 a.m. 16.66 2.90 54.45 0.10 03Jan2018 4 a.m. 15.93 3.60 56.52 0.00 03Jan2018 5 a.m. 15.87 8.60 57.23 0.00 03Jan2018 6 a.m. 15.53 11.80 63.07 0.00 03Jan2018 7 a.m. 17.55 11.90 69.66 0.00 Accuml. Values 422.62 111.10 1158.57 2033.90 Num. Valid Values 24 24 24 24 Avg. Values 17.61 4.63 48.27 84.75 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.00 178.76 48.27 174.87 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5173 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.0717 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 = 0.2845 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7155 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.3979 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 = 1.7550 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5394 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.048 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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