Detailed Weather Data for Project: MARI

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 62.62 18.92 88.21 10.00 04Dec2017 9 a.m. 63.39 18.71 84.85 107.00 04Dec2017 10 a.m. 63.19 17.57 78.63 118.00 04Dec2017 11 a.m. 61.20 22.23 66.78 157.00 04Dec2017 12 p.m. 53.17 24.70 58.42 277.00 04Dec2017 1 p.m. 53.74 21.54 59.16 391.00 04Dec2017 2 p.m. 56.70 24.23 55.25 490.00 04Dec2017 3 p.m. 56.14 26.52 48.16 387.00 04Dec2017 4 p.m. 52.84 29.79 56.59 137.00 04Dec2017 5 p.m. 49.23 35.60 52.32 20.00 04Dec2017 6 p.m. 45.82 31.73 57.33 0.00 04Dec2017 7 p.m. 38.35 7.07 33.64 1.00 04Dec2017 8 p.m. 40.55 31.51 59.52 0.00 04Dec2017 9 p.m. 38.48 27.20 62.77 0.00 04Dec2017 10 p.m. 35.73 28.18 54.95 0.00 04Dec2017 11 p.m. 33.19 22.14 49.51 0.00 05Dec2017 12 a.m. 31.66 25.56 55.81 1.00 05Dec2017 1 a.m. 30.34 20.24 56.60 0.00 05Dec2017 2 a.m. 29.46 17.16 55.26 0.00 05Dec2017 3 a.m. 30.67 20.39 60.87 0.00 05Dec2017 4 a.m. 28.35 13.41 55.01 0.00 05Dec2017 5 a.m. 28.69 13.26 52.27 0.00 05Dec2017 6 a.m. 28.80 13.70 48.85 0.00 05Dec2017 7 a.m. 27.91 14.40 53.00 1.00 Accuml. Values 1040.21 525.76 1403.76 2097.00 Num. Valid Values 24 24 24 24 Avg. Values 43.34 21.91 58.49 87.38 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.30 845.95 58.49 180.30 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4151 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.2145 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 = 0.5003 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4997 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.7596 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 = 3.9717 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.6710 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.205 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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