Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 44.37 13.81 47.75 89.00 05Mar2018 9 a.m. 48.32 22.82 36.00 288.00 05Mar2018 10 a.m. 52.43 25.39 21.75 471.75 05Mar2018 11 a.m. 55.58 23.11 17.00 647.00 05Mar2018 12 p.m. 58.77 23.04 12.00 808.50 05Mar2018 1 p.m. 60.14 21.33 9.00 827.33 05Mar2018 2 p.m. 61.70 18.90 8.25 819.25 05Mar2018 3 p.m. 62.46 19.85 6.75 753.00 05Mar2018 4 p.m. 61.83 16.55 6.50 597.75 05Mar2018 5 p.m. 60.93 13.14 7.00 399.50 05Mar2018 6 p.m. 57.02 11.63 9.00 81.00 05Mar2018 7 p.m. -901.00 -901.00 -901.00 -901.00 05Mar2018 8 p.m. 45.32 2.68 16.00 0.00 05Mar2018 9 p.m. 41.09 4.25 21.50 0.00 05Mar2018 10 p.m. 36.20 4.25 29.67 0.00 05Mar2018 11 p.m. 32.63 1.62 40.75 0.00 06Mar2018 12 a.m. 31.01 5.93 41.00 0.00 06Mar2018 1 a.m. 31.96 6.38 38.50 0.00 06Mar2018 2 a.m. 32.04 8.00 38.50 0.00 06Mar2018 3 a.m. 31.04 6.71 36.67 0.00 06Mar2018 4 a.m. 27.95 8.44 44.75 0.00 06Mar2018 5 a.m. 28.67 4.36 43.50 0.00 06Mar2018 6 a.m. 28.22 3.52 44.75 0.00 06Mar2018 7 a.m. 29.21 6.15 43.50 2.00 Accuml. Values 1018.89 271.86 620.09 5784.08 Num. Valid Values 23 23 23 23 Avg. Values 44.30 11.82 26.96 251.48 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.83 456.44 26.96 518.94 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.7304 definition: xcompl = 1 - (RELH_avg/100) TdC = -11.0129 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 = 0.5084 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4916 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.8382 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 = 7.2991 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.0263 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.291 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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