Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 29.10 7.70 55.12 0.00 29Dec2017 9 a.m. 29.46 8.10 54.76 10.80 29Dec2017 10 a.m. 29.95 6.90 54.93 42.00 29Dec2017 11 a.m. 31.46 7.60 56.08 88.60 29Dec2017 12 p.m. 33.40 7.70 55.24 150.30 29Dec2017 1 p.m. 36.41 8.50 52.52 249.30 29Dec2017 2 p.m. 40.17 6.30 48.05 118.00 29Dec2017 3 p.m. 41.59 7.00 47.79 149.30 29Dec2017 4 p.m. 42.75 8.00 50.81 248.10 29Dec2017 5 p.m. 41.54 5.60 57.75 72.60 29Dec2017 6 p.m. 39.31 2.60 63.63 0.00 29Dec2017 7 p.m. 22.87 7.70 71.96 0.00 29Dec2017 8 p.m. 38.46 1.40 70.75 0.00 29Dec2017 9 p.m. 38.52 1.80 71.01 0.00 29Dec2017 10 p.m. 38.34 0.90 73.76 0.00 29Dec2017 11 p.m. 37.90 0.20 77.91 0.00 30Dec2017 12 a.m. 37.67 1.40 81.12 0.00 30Dec2017 1 a.m. 37.49 1.70 80.76 0.00 30Dec2017 2 a.m. 37.13 2.40 84.52 0.00 30Dec2017 3 a.m. 37.35 2.60 84.62 0.00 30Dec2017 4 a.m. 37.53 3.00 82.95 0.00 30Dec2017 5 a.m. 37.53 4.40 82.48 0.00 30Dec2017 6 a.m. 35.20 11.50 83.03 0.00 30Dec2017 7 a.m. 30.18 14.20 87.12 0.00 Accuml. Values 861.31 129.20 1628.67 1129.00 Num. Valid Values 24 24 24 24 Avg. Values 35.89 5.38 67.86 47.04 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 2.16 207.88 67.86 97.07 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3214 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.1235 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 = 0.4369 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5631 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1525 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 = 2.2961 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.1256 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.045 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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