Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 64.54 1.96 83.73 3.00 04Dec2017 9 a.m. 66.29 4.34 81.28 73.00 04Dec2017 10 a.m. 67.17 8.07 80.24 89.00 04Dec2017 11 a.m. 68.05 10.21 78.16 103.00 04Dec2017 12 p.m. 69.04 14.06 76.04 111.00 04Dec2017 1 p.m. 70.14 15.47 74.19 189.00 04Dec2017 2 p.m. 71.89 12.96 70.71 267.00 04Dec2017 3 p.m. 72.55 12.16 69.19 344.00 04Dec2017 4 p.m. 72.77 13.63 69.54 112.00 04Dec2017 5 p.m. 72.88 9.40 70.52 33.00 04Dec2017 6 p.m. 66.18 7.79 81.22 0.00 04Dec2017 7 p.m. 39.60 5.63 40.67 0.00 04Dec2017 8 p.m. 63.75 12.33 49.64 0.00 04Dec2017 9 p.m. 62.55 8.89 47.26 0.00 04Dec2017 10 p.m. 61.02 14.44 33.52 0.00 04Dec2017 11 p.m. 56.28 14.44 43.96 0.00 05Dec2017 12 a.m. 52.66 9.14 40.49 0.00 05Dec2017 1 a.m. 50.23 9.16 39.38 0.00 05Dec2017 2 a.m. 48.04 6.53 40.91 0.00 05Dec2017 3 a.m. 45.63 8.53 48.36 0.00 05Dec2017 4 a.m. 44.40 11.46 49.40 0.00 05Dec2017 5 a.m. 43.65 6.88 50.68 0.00 05Dec2017 6 a.m. 42.66 9.34 51.41 0.00 05Dec2017 7 a.m. 40.89 9.22 56.91 0.00 Accuml. Values 1412.87 236.04 1427.41 1324.00 Num. Valid Values 24 24 24 24 Avg. Values 58.87 9.84 59.48 55.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.93 379.79 59.48 113.84 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4052 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.1657 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 = 0.6236 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3764 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2495 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 = 6.8440 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.2664 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.129 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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