Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 11.30 2.46 60.25 2.25 02Jan2018 9 a.m. 11.90 1.04 61.00 41.00 02Jan2018 10 a.m. 13.42 3.47 58.00 71.50 02Jan2018 11 a.m. 14.54 2.16 54.33 132.00 02Jan2018 12 p.m. 17.00 3.28 49.33 250.67 02Jan2018 1 p.m. 18.44 3.73 44.67 302.33 02Jan2018 2 p.m. 20.53 3.52 41.75 287.50 02Jan2018 3 p.m. 22.87 3.30 37.50 387.50 02Jan2018 4 p.m. 24.67 1.79 34.75 292.00 02Jan2018 5 p.m. 24.58 2.24 33.50 149.75 02Jan2018 6 p.m. 17.60 5.59 47.00 0.00 02Jan2018 7 p.m. 14.36 6.93 53.00 0.00 02Jan2018 8 p.m. 11.30 9.17 61.00 0.00 02Jan2018 9 p.m. 10.58 6.71 61.00 0.00 02Jan2018 10 p.m. 10.46 5.37 63.33 0.00 02Jan2018 11 p.m. 12.47 6.65 59.50 0.00 03Jan2018 12 a.m. 11.66 4.59 61.25 0.00 03Jan2018 1 a.m. 8.15 3.52 71.00 0.00 03Jan2018 2 a.m. 7.93 3.63 74.50 0.00 03Jan2018 3 a.m. 7.52 3.28 75.67 0.00 03Jan2018 4 a.m. 12.16 8.33 70.25 0.00 03Jan2018 5 a.m. 13.10 7.27 67.00 0.00 03Jan2018 6 a.m. 15.17 7.72 65.50 0.00 03Jan2018 7 a.m. 18.50 9.95 58.50 0.00 Accuml. Values 350.21 115.70 1363.58 1916.50 Num. Valid Values 24 24 24 24 Avg. Values 14.59 4.82 56.82 79.85 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -9.67 186.16 56.82 164.78 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4318 definition: xcompl = 1 - (RELH_avg/100) TdC = -16.6372 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 = 0.2613 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7387 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2887 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 = 1.2798 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1926 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.038 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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