Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 63.16 9.50 99.03 1.70 04Dec2017 9 a.m. 63.90 9.80 98.64 11.00 04Dec2017 10 a.m. 65.55 11.70 94.54 64.00 04Dec2017 11 a.m. 67.48 12.20 88.53 137.60 04Dec2017 12 p.m. 69.66 13.00 81.90 316.30 04Dec2017 1 p.m. 72.45 14.00 72.55 489.50 04Dec2017 2 p.m. 73.74 12.70 67.34 322.10 04Dec2017 3 p.m. 74.34 11.10 64.02 169.30 04Dec2017 4 p.m. 73.63 10.20 66.31 91.20 04Dec2017 5 p.m. 72.90 9.00 68.15 22.80 04Dec2017 6 p.m. 67.80 9.20 57.66 0.00 04Dec2017 7 p.m. 36.23 1.30 44.22 0.00 04Dec2017 8 p.m. 61.65 10.60 37.67 0.00 04Dec2017 9 p.m. 59.50 14.60 31.27 0.00 04Dec2017 10 p.m. 54.03 17.40 39.07 0.00 04Dec2017 11 p.m. 50.20 14.30 40.23 0.00 05Dec2017 12 a.m. 47.21 12.70 41.94 0.00 05Dec2017 1 a.m. 44.19 10.40 46.32 0.00 05Dec2017 2 a.m. 41.76 6.80 53.32 0.00 05Dec2017 3 a.m. 41.36 8.40 52.34 0.00 05Dec2017 4 a.m. 39.70 10.00 56.39 0.00 05Dec2017 5 a.m. 37.44 9.20 57.04 0.00 05Dec2017 6 a.m. 35.85 9.50 56.06 0.00 05Dec2017 7 a.m. 35.02 10.00 50.20 0.00 Accuml. Values 1348.73 257.60 1464.74 1625.50 Num. Valid Values 24 24 24 24 Avg. Values 56.20 10.73 61.03 67.73 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.44 414.48 61.03 139.76 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3897 definition: xcompl = 1 - (RELH_avg/100) TdC = 6.1426 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 = 0.6037 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3963 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.5118 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 = 5.9782 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.8240 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.134 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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