Detailed Weather Data for Project: KAWL

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 48.78 4.60 100.19 0.00 04Nov2017 9 a.m. 49.46 4.10 100.19 7.40 04Nov2017 10 a.m. 50.47 5.30 100.19 32.20 04Nov2017 11 a.m. 51.44 5.00 100.19 51.10 04Nov2017 12 p.m. 52.61 4.30 100.19 79.90 04Nov2017 1 p.m. 53.65 3.40 100.19 103.60 04Nov2017 2 p.m. 54.37 1.90 100.17 110.80 04Nov2017 3 p.m. 55.45 2.60 94.93 164.20 04Nov2017 4 p.m. 57.88 2.40 86.24 182.80 04Nov2017 5 p.m. 58.50 6.30 85.17 196.60 04Nov2017 6 p.m. 58.17 8.30 86.74 73.10 04Nov2017 7 p.m. 57.61 5.10 86.96 1.00 04Nov2017 8 p.m. 51.35 7.10 77.59 0.00 04Nov2017 9 p.m. 55.80 7.50 92.33 0.00 04Nov2017 10 p.m. 54.64 7.80 94.10 0.00 04Nov2017 11 p.m. 54.46 8.30 95.73 0.00 05Nov2017 12 a.m. 53.96 3.20 97.69 0.00 05Nov2017 1 a.m. 53.98 5.90 99.58 0.00 05Nov2017 2 a.m. 56.21 6.20 99.60 0.00 05Nov2017 3 a.m. 56.39 5.30 99.89 0.00 05Nov2017 4 a.m. 57.33 5.90 99.53 0.00 05Nov2017 5 a.m. 59.79 6.90 94.43 0.00 05Nov2017 6 a.m. 59.99 7.60 91.15 0.00 05Nov2017 7 a.m. 59.45 5.30 89.47 0.00 Accuml. Values 1321.75 130.30 2272.44 1002.70 Num. Valid Values 24 24 24 24 Avg. Values 55.07 5.43 94.68 41.78 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 12.82 209.65 94.68 86.21 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0532 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.9647 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 = 0.5951 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4049 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1032 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 = 0.8077 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8519 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.011 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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