Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 37.71 1.23 98.75 13.50 03Dec2017 9 a.m. 41.36 1.49 99.00 49.33 03Dec2017 10 a.m. 47.52 3.58 98.00 146.75 03Dec2017 11 a.m. 52.76 5.74 86.33 122.00 03Dec2017 12 p.m. 59.18 10.85 63.50 236.00 03Dec2017 1 p.m. 66.92 12.68 50.00 435.00 03Dec2017 2 p.m. 72.77 13.65 43.00 403.00 03Dec2017 3 p.m. 75.20 20.08 40.25 383.25 03Dec2017 4 p.m. 74.39 18.23 43.75 251.00 03Dec2017 5 p.m. 72.36 18.17 48.25 103.75 03Dec2017 6 p.m. 67.64 19.68 59.00 0.00 03Dec2017 7 p.m. 65.66 20.36 65.00 0.00 03Dec2017 8 p.m. 64.04 19.46 70.00 0.00 03Dec2017 9 p.m. 62.78 17.67 74.00 0.00 03Dec2017 10 p.m. 62.15 15.77 78.00 0.00 03Dec2017 11 p.m. 62.19 17.95 83.00 0.00 04Dec2017 12 a.m. 61.47 20.75 85.50 0.00 04Dec2017 1 a.m. 60.44 21.03 87.75 0.00 04Dec2017 2 a.m. 59.49 20.97 90.50 0.00 04Dec2017 3 a.m. 59.18 22.29 92.00 0.00 04Dec2017 4 a.m. 59.00 22.15 92.50 0.00 04Dec2017 5 a.m. 58.91 21.70 92.00 0.00 04Dec2017 6 a.m. 57.74 21.53 93.00 0.00 04Dec2017 7 a.m. 57.29 21.70 94.00 0.00 Accuml. Values 1458.15 388.71 1827.08 2143.58 Num. Valid Values 24 24 24 24 Avg. Values 60.76 16.20 76.13 89.32 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 15.98 625.43 76.13 184.31 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2387 definition: xcompl = 1 - (RELH_avg/100) TdC = 11.8252 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 = 0.6373 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3627 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1234 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 = 4.2891 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.0448 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.143 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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