Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 21.40 1.90 70.98 0.00 29Dec2017 9 a.m. 23.45 3.20 69.97 3.80 29Dec2017 10 a.m. 25.70 5.80 66.10 55.30 29Dec2017 11 a.m. 29.23 9.10 57.39 112.80 29Dec2017 12 p.m. 30.81 10.20 63.02 113.90 29Dec2017 1 p.m. 32.22 10.00 61.26 150.60 29Dec2017 2 p.m. 33.13 10.80 57.79 170.20 29Dec2017 3 p.m. 34.50 8.90 56.65 191.50 29Dec2017 4 p.m. 36.73 7.90 56.24 156.90 29Dec2017 5 p.m. 37.42 5.50 58.27 35.00 29Dec2017 6 p.m. 36.77 4.30 63.34 0.00 29Dec2017 7 p.m. 15.94 11.30 47.49 0.00 29Dec2017 8 p.m. 35.19 2.60 71.77 0.00 29Dec2017 9 p.m. 34.68 2.10 73.72 0.00 29Dec2017 10 p.m. 34.43 2.30 74.92 0.00 29Dec2017 11 p.m. 34.05 1.10 76.39 0.00 30Dec2017 12 a.m. 33.85 3.40 77.32 0.00 30Dec2017 1 a.m. 33.51 3.70 77.32 0.00 30Dec2017 2 a.m. 31.68 4.80 74.77 0.00 30Dec2017 3 a.m. 23.74 6.50 83.40 0.00 30Dec2017 4 a.m. 20.50 6.70 87.51 0.00 30Dec2017 5 a.m. 18.93 6.00 87.68 0.00 30Dec2017 6 a.m. 17.20 5.90 86.16 0.00 30Dec2017 7 a.m. 16.27 5.40 83.31 0.00 Accuml. Values 691.34 139.40 1682.77 990.00 Num. Valid Values 24 24 24 24 Avg. Values 28.81 5.81 70.12 41.25 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -1.77 224.29 70.12 85.12 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2988 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.4732 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 = 0.3763 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6237 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3049 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 = 1.6082 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.6261 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.035 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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