Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 48.33 2.60 91.65 4.70 03Dec2017 9 a.m. 49.50 4.50 94.24 93.10 03Dec2017 10 a.m. 53.58 10.60 91.98 136.10 03Dec2017 11 a.m. 56.30 10.00 85.86 259.90 03Dec2017 12 p.m. 58.60 12.00 77.97 308.10 03Dec2017 1 p.m. 61.50 11.80 70.89 369.60 03Dec2017 2 p.m. 65.73 12.20 60.26 398.30 03Dec2017 3 p.m. 70.74 14.40 47.83 325.50 03Dec2017 4 p.m. 69.60 15.20 56.41 152.00 03Dec2017 5 p.m. 68.74 15.40 61.65 52.80 03Dec2017 6 p.m. 66.31 12.10 67.90 0.00 03Dec2017 7 p.m. 56.64 24.20 35.02 0.00 03Dec2017 8 p.m. 62.73 14.40 77.78 0.00 03Dec2017 9 p.m. 63.63 15.20 75.80 0.00 03Dec2017 10 p.m. 65.66 20.50 71.72 0.00 03Dec2017 11 p.m. 65.66 20.60 76.54 0.00 04Dec2017 12 a.m. 65.39 21.90 81.65 0.00 04Dec2017 1 a.m. 64.89 23.40 84.06 0.00 04Dec2017 2 a.m. 64.63 22.50 85.25 0.00 04Dec2017 3 a.m. 65.21 21.50 84.50 0.00 04Dec2017 4 a.m. 65.53 22.40 83.17 0.00 04Dec2017 5 a.m. 65.97 20.60 81.90 0.00 04Dec2017 6 a.m. 65.77 20.60 82.31 0.00 04Dec2017 7 a.m. 65.84 22.40 82.20 0.00 Accuml. Values 1506.47 391.00 1808.54 2100.10 Num. Valid Values 24 24 24 24 Avg. Values 62.77 16.29 75.36 87.50 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 17.09 629.12 75.36 180.57 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2464 definition: xcompl = 1 - (RELH_avg/100) TdC = 12.7591 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 = 0.6516 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3484 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1188 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 = 4.7482 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.8400 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.150 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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