Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 18.05 13.42 89.50 0.75 30Dec2017 9 a.m. 17.24 13.05 89.33 12.67 30Dec2017 10 a.m. 16.84 13.03 86.75 51.00 30Dec2017 11 a.m. 17.24 12.75 81.33 97.67 30Dec2017 12 p.m. 17.78 10.96 75.50 114.00 30Dec2017 1 p.m. 18.14 10.51 72.00 154.00 30Dec2017 2 p.m. 18.59 10.18 70.00 167.25 30Dec2017 3 p.m. 19.27 7.83 66.25 142.50 30Dec2017 4 p.m. 19.36 6.93 64.00 82.75 30Dec2017 5 p.m. 18.77 7.72 64.25 30.75 30Dec2017 6 p.m. 17.42 10.07 68.00 0.00 30Dec2017 7 p.m. 16.52 6.26 71.00 0.00 30Dec2017 8 p.m. 16.25 5.48 74.00 0.00 30Dec2017 9 p.m. 16.22 4.47 76.67 0.00 30Dec2017 10 p.m. 16.07 4.64 81.50 0.00 30Dec2017 11 p.m. 16.12 5.70 84.75 0.00 31Dec2017 12 a.m. 16.03 6.88 85.00 0.00 31Dec2017 1 a.m. 16.48 9.73 88.00 0.00 31Dec2017 2 a.m. 16.84 12.14 86.25 0.00 31Dec2017 3 a.m. 17.00 13.87 86.00 0.00 31Dec2017 4 a.m. 16.70 11.18 83.00 0.00 31Dec2017 5 a.m. 15.08 18.12 71.50 0.00 31Dec2017 6 a.m. 14.00 13.37 64.50 0.00 31Dec2017 7 a.m. 13.19 11.30 65.00 0.00 Accuml. Values 405.20 239.59 1844.08 853.34 Num. Valid Values 24 24 24 24 Avg. Values 16.88 9.98 76.84 35.56 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.40 385.50 76.84 73.37 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2316 definition: xcompl = 1 - (RELH_avg/100) TdC = -11.7275 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 = 0.2789 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7211 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.4526 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 = 0.7577 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.2048 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.029 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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