Detailed Weather Data for Project: MARI

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. -6.03 6.21 73.42 9.00 01Jan2018 9 a.m. -4.49 6.12 69.88 159.00 01Jan2018 10 a.m. -1.75 7.46 63.70 325.00 01Jan2018 11 a.m. 1.00 5.75 59.55 461.00 01Jan2018 12 p.m. 4.30 5.40 56.37 547.00 01Jan2018 1 p.m. 7.05 3.22 49.29 389.00 01Jan2018 2 p.m. 8.47 2.60 47.27 256.00 01Jan2018 3 p.m. 10.67 3.73 44.16 417.00 01Jan2018 4 p.m. 12.65 3.23 39.39 265.00 01Jan2018 5 p.m. 11.98 4.83 39.69 42.00 01Jan2018 6 p.m. 8.91 3.99 43.23 0.00 01Jan2018 7 p.m. 16.93 5.50 40.24 1.00 01Jan2018 8 p.m. 8.15 3.56 49.16 0.00 01Jan2018 9 p.m. 8.15 4.27 50.81 0.00 01Jan2018 10 p.m. 6.94 4.27 53.62 0.00 01Jan2018 11 p.m. 5.50 4.42 58.57 0.00 02Jan2018 12 a.m. 6.06 2.07 57.16 0.00 02Jan2018 1 a.m. 4.73 2.42 61.55 0.00 02Jan2018 2 a.m. 2.77 2.88 65.29 0.00 02Jan2018 3 a.m. 1.44 3.22 67.24 0.00 02Jan2018 4 a.m. 0.79 3.10 67.49 0.00 02Jan2018 5 a.m. 0.68 3.12 68.89 0.00 02Jan2018 6 a.m. 0.01 2.14 71.83 0.00 02Jan2018 7 a.m. 0.12 3.14 69.20 0.00 Accuml. Values 115.05 96.65 1367.00 2871.00 Num. Valid Values 24 24 24 24 Avg. Values 4.79 4.03 56.96 119.63 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -15.11 155.51 56.96 246.85 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4304 definition: xcompl = 1 - (RELH_avg/100) TdC = -21.7299 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 = 0.1928 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8072 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9183 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 = 0.8195 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.7310 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.030 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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