Detailed Weather Data for Project: MARI

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 4.51 15.04 66.45 5.00 31Dec2017 9 a.m. 4.64 17.52 69.33 122.00 31Dec2017 10 a.m. 4.96 20.06 70.11 402.00 31Dec2017 11 a.m. 5.29 16.80 69.94 308.00 31Dec2017 12 p.m. 5.74 16.75 66.70 487.00 31Dec2017 1 p.m. 7.27 16.46 60.64 567.00 31Dec2017 2 p.m. 8.60 16.64 57.78 519.00 31Dec2017 3 p.m. 9.46 15.57 58.57 414.00 31Dec2017 4 p.m. 9.14 16.57 56.98 258.00 31Dec2017 5 p.m. 8.37 14.06 55.45 60.00 31Dec2017 6 p.m. 7.16 12.90 59.85 0.00 31Dec2017 7 p.m. 8.04 4.03 45.62 0.00 31Dec2017 8 p.m. 3.97 12.89 65.78 0.00 31Dec2017 9 p.m. 2.44 11.39 69.57 0.00 31Dec2017 10 p.m. 1.22 12.07 72.69 0.00 31Dec2017 11 p.m. 0.25 13.17 75.37 0.00 01Jan2018 12 a.m. -1.08 10.45 75.56 0.00 01Jan2018 1 a.m. -2.07 11.77 75.68 0.00 01Jan2018 2 a.m. -2.72 8.35 77.08 0.00 01Jan2018 3 a.m. -3.50 8.16 76.17 0.00 01Jan2018 4 a.m. -4.27 9.25 73.36 0.00 01Jan2018 5 a.m. -4.59 8.37 72.99 0.00 01Jan2018 6 a.m. -5.48 9.89 72.69 0.00 01Jan2018 7 a.m. -5.37 8.04 74.95 0.00 Accuml. Values 61.99 306.20 1619.31 3142.00 Num. Valid Values 24 24 24 24 Avg. Values 2.58 12.76 67.47 130.92 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -16.34 492.68 67.47 270.15 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3253 definition: xcompl = 1 - (RELH_avg/100) TdC = -20.9371 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 = 0.1789 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8211 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1026 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 = 0.5570 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1047 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.043 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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