Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 50.36 2.14 73.84 12.00 04Mar2018 9 a.m. 50.68 2.41 73.04 37.00 04Mar2018 10 a.m. 51.26 2.42 70.43 55.00 04Mar2018 11 a.m. 51.57 4.11 71.45 133.00 04Mar2018 12 p.m. 51.13 3.32 76.65 138.00 04Mar2018 1 p.m. 52.02 3.16 79.21 114.00 04Mar2018 2 p.m. 52.45 3.98 79.70 87.00 04Mar2018 3 p.m. 53.44 3.19 79.94 106.00 04Mar2018 4 p.m. 53.76 2.84 81.78 102.00 04Mar2018 5 p.m. 54.10 2.24 81.90 63.00 04Mar2018 6 p.m. 54.75 1.62 78.54 20.00 04Mar2018 7 p.m. 57.27 8.17 21.25 6.00 04Mar2018 8 p.m. 54.55 1.68 78.92 0.00 04Mar2018 9 p.m. 52.79 1.24 87.53 0.00 04Mar2018 10 p.m. 52.79 1.68 84.16 0.00 04Mar2018 11 p.m. 52.23 1.96 88.19 0.00 05Mar2018 12 a.m. 52.12 1.71 89.12 0.00 05Mar2018 1 a.m. 52.56 2.97 86.72 0.00 05Mar2018 2 a.m. 52.23 1.93 89.41 0.00 05Mar2018 3 a.m. 52.23 1.14 90.20 0.00 05Mar2018 4 a.m. 52.23 1.59 93.07 0.00 05Mar2018 5 a.m. 52.34 1.07 95.27 0.00 05Mar2018 6 a.m. 52.56 1.26 96.56 0.00 05Mar2018 7 a.m. 53.22 1.17 98.02 0.00 Accuml. Values 1264.66 59.00 1944.90 873.00 Num. Valid Values 24 24 24 24 Avg. Values 52.69 2.46 81.04 36.38 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.50 94.93 81.04 75.06 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1896 definition: xcompl = 1 - (RELH_avg/100) TdC = 8.3719 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 = 0.5766 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4234 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2437 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 = 2.5664 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5936 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.021 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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