Detailed Weather Data for Project: ROBE

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 53.65 0.91 81.59 12.00 03Dec2017 9 a.m. 57.52 1.35 75.37 77.00 03Dec2017 10 a.m. 62.78 1.84 68.40 262.00 03Dec2017 11 a.m. 64.99 2.43 66.70 281.00 03Dec2017 12 p.m. 71.26 1.50 56.43 522.00 03Dec2017 1 p.m. 72.36 6.49 55.70 492.00 03Dec2017 2 p.m. 71.26 8.02 58.63 299.00 03Dec2017 3 p.m. 72.12 4.57 56.98 254.00 03Dec2017 4 p.m. 71.47 3.28 58.14 188.00 03Dec2017 5 p.m. 70.68 3.77 56.79 113.00 03Dec2017 6 p.m. 67.28 5.91 62.53 2.00 03Dec2017 7 p.m. 64.87 3.06 86.22 0.00 03Dec2017 8 p.m. 62.44 6.94 72.30 0.00 03Dec2017 9 p.m. 60.46 5.07 76.57 0.00 03Dec2017 10 p.m. 60.69 2.60 75.48 0.00 03Dec2017 11 p.m. 59.58 3.03 77.43 0.00 04Dec2017 12 a.m. 59.36 1.99 76.82 0.00 04Dec2017 1 a.m. 60.67 1.67 71.19 0.00 04Dec2017 2 a.m. 59.38 0.88 73.84 0.00 04Dec2017 3 a.m. 58.26 1.67 78.77 0.00 04Dec2017 4 a.m. 59.14 1.91 79.87 0.00 04Dec2017 5 a.m. 64.09 3.71 75.42 0.00 04Dec2017 6 a.m. 63.23 3.97 80.07 0.00 04Dec2017 7 a.m. 63.64 4.85 81.09 0.00 Accuml. Values 1531.20 81.42 1702.33 2502.00 Num. Valid Values 24 24 24 24 Avg. Values 63.80 3.39 70.93 104.25 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.67 131.00 70.93 215.12 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2907 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.4079 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 = 0.6587 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3413 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.5812 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 = 5.8016 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.7581 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.092 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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