Detailed Weather Data for Project: MARI

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 7.48 16.04 79.76 6.00 30Dec2017 9 a.m. 7.83 17.00 75.67 152.00 30Dec2017 10 a.m. 8.91 16.58 73.89 267.00 30Dec2017 11 a.m. 10.00 14.00 71.69 467.00 30Dec2017 12 p.m. 10.67 12.78 68.32 446.00 30Dec2017 1 p.m. 12.54 12.50 64.72 542.00 30Dec2017 2 p.m. 14.52 9.76 60.94 503.00 30Dec2017 3 p.m. 14.63 9.87 58.55 327.00 30Dec2017 4 p.m. 15.28 10.01 57.39 264.00 30Dec2017 5 p.m. 13.96 7.23 54.52 32.00 30Dec2017 6 p.m. 11.10 8.27 55.56 0.00 30Dec2017 7 p.m. 5.63 15.22 64.61 0.00 30Dec2017 8 p.m. 7.81 9.92 62.83 0.00 30Dec2017 9 p.m. 7.38 10.12 64.79 0.00 30Dec2017 10 p.m. 7.38 12.30 68.93 0.00 30Dec2017 11 p.m. 7.16 14.93 69.61 0.00 31Dec2017 12 a.m. 6.82 15.65 71.51 0.00 31Dec2017 1 a.m. 6.28 16.75 70.71 0.00 31Dec2017 2 a.m. 5.95 13.80 71.69 0.00 31Dec2017 3 a.m. 5.40 11.68 70.60 0.00 31Dec2017 4 a.m. 5.18 14.03 72.62 0.00 31Dec2017 5 a.m. 4.96 13.34 70.23 0.00 31Dec2017 6 a.m. 4.19 12.97 68.77 0.00 31Dec2017 7 a.m. 4.64 17.55 65.04 0.00 Accuml. Values 205.70 312.30 1612.95 3006.00 Num. Valid Values 24 24 24 24 Avg. Values 8.57 13.01 67.21 125.25 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -13.02 502.49 67.21 258.46 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3279 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.7941 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 = 0.2179 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7821 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.0487 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 = 0.7403 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.4407 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.053 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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