Detailed Weather Data for Project: JOHN

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 20.05 6.40 95.06 0.00 29Dec2017 9 a.m. 22.82 7.80 91.26 6.10 29Dec2017 10 a.m. 27.21 7.50 83.97 18.00 29Dec2017 11 a.m. 29.71 11.90 78.68 58.60 29Dec2017 12 p.m. 32.54 8.80 71.75 74.00 29Dec2017 1 p.m. 34.23 10.10 70.76 103.10 29Dec2017 2 p.m. 36.01 13.00 72.24 94.80 29Dec2017 3 p.m. 37.09 16.30 76.54 62.70 29Dec2017 4 p.m. 37.02 12.40 81.49 24.10 29Dec2017 5 p.m. 36.59 9.20 86.54 0.40 29Dec2017 6 p.m. 36.70 5.20 85.94 0.00 29Dec2017 7 p.m. 11.52 11.00 50.35 0.00 29Dec2017 8 p.m. 35.35 2.10 91.35 0.00 29Dec2017 9 p.m. 34.90 4.90 94.03 0.00 29Dec2017 10 p.m. 34.48 10.40 91.61 0.00 29Dec2017 11 p.m. 31.87 21.80 93.22 0.00 30Dec2017 12 a.m. 25.02 25.10 100.24 0.00 30Dec2017 1 a.m. 21.96 23.40 100.24 0.00 30Dec2017 2 a.m. 20.55 19.70 99.18 0.00 30Dec2017 3 a.m. 18.12 22.90 92.68 0.00 30Dec2017 4 a.m. 16.57 25.80 87.01 0.00 30Dec2017 5 a.m. 14.61 26.10 81.54 0.00 30Dec2017 6 a.m. 11.52 25.10 82.71 0.00 30Dec2017 7 a.m. 10.22 19.60 83.26 0.00 Accuml. Values 636.67 346.50 2041.65 441.80 Num. Valid Values 24 24 24 24 Avg. Values 26.53 14.44 85.07 18.41 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -3.04 557.52 85.07 37.99 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1493 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.2114 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 = 0.3571 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6429 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.7128 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 = 0.7411 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5648 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.030 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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