Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 53.33 1.50 98.20 33.00 05Mar2018 9 a.m. 55.74 1.56 93.20 114.00 05Mar2018 10 a.m. 57.29 14.27 62.35 312.00 05Mar2018 11 a.m. 61.03 16.39 39.33 714.00 05Mar2018 12 p.m. 63.43 18.82 31.27 832.00 05Mar2018 1 p.m. 64.22 15.86 27.36 882.00 05Mar2018 2 p.m. 62.55 16.60 31.33 827.00 05Mar2018 3 p.m. 62.65 17.76 26.56 761.00 05Mar2018 4 p.m. 63.10 13.89 20.33 594.00 05Mar2018 5 p.m. 62.01 11.49 17.34 380.00 05Mar2018 6 p.m. 60.24 12.60 16.61 146.00 05Mar2018 7 p.m. 49.82 18.33 31.33 5.00 05Mar2018 8 p.m. 55.87 6.14 21.25 0.00 05Mar2018 9 p.m. 51.24 4.94 78.91 0.00 05Mar2018 10 p.m. 50.47 4.28 53.62 0.00 05Mar2018 11 p.m. 49.37 2.55 60.95 0.00 06Mar2018 12 a.m. 46.74 1.71 72.37 0.00 06Mar2018 1 a.m. 41.02 0.28 84.65 0.00 06Mar2018 2 a.m. 38.07 0.29 83.80 0.00 06Mar2018 3 a.m. 41.13 2.55 73.53 0.00 06Mar2018 4 a.m. 43.45 2.10 75.13 0.00 06Mar2018 5 a.m. 41.79 4.21 71.70 0.00 06Mar2018 6 a.m. 42.46 5.35 70.85 0.00 06Mar2018 7 a.m. 43.66 4.68 60.47 3.00 Accuml. Values 1260.68 198.15 1302.44 5603.00 Num. Valid Values 24 24 24 24 Avg. Values 52.53 8.26 54.27 233.46 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 11.40 318.82 54.27 481.75 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4573 definition: xcompl = 1 - (RELH_avg/100) TdC = 2.5136 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 = 0.5753 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4247 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.7180 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 = 6.1744 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.6729 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.218 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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