Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 33.17 8.91 33.31 0.00 05Dec2017 9 a.m. 33.46 6.39 34.83 10.78 05Dec2017 10 a.m. 33.93 8.41 34.61 39.13 05Dec2017 11 a.m. 34.83 7.92 34.47 129.01 05Dec2017 12 p.m. 36.97 8.50 30.88 259.93 05Dec2017 1 p.m. 38.66 7.50 29.01 386.02 05Dec2017 2 p.m. 40.55 5.88 27.39 262.43 05Dec2017 3 p.m. 41.58 4.73 26.07 178.17 05Dec2017 4 p.m. 42.28 4.04 27.20 111.04 05Dec2017 5 p.m. 42.01 5.46 28.38 31.70 05Dec2017 6 p.m. 40.53 5.60 33.56 0.00 05Dec2017 7 p.m. 45.79 3.85 33.12 0.00 05Dec2017 8 p.m. 38.55 4.28 55.36 0.00 05Dec2017 9 p.m. 37.17 4.94 58.15 0.00 05Dec2017 10 p.m. 36.36 6.63 59.46 0.00 05Dec2017 11 p.m. 35.47 6.16 64.58 0.00 06Dec2017 12 a.m. 35.04 6.72 65.25 0.00 06Dec2017 1 a.m. 34.93 8.73 63.54 0.00 06Dec2017 2 a.m. 34.86 10.21 65.42 0.00 06Dec2017 3 a.m. 35.80 9.52 59.84 0.00 06Dec2017 4 a.m. 37.09 6.43 57.40 0.00 06Dec2017 5 a.m. 37.27 6.80 58.48 0.00 06Dec2017 6 a.m. 37.20 6.88 56.71 0.00 06Dec2017 7 a.m. 36.43 6.13 56.40 0.00 Accuml. Values 899.92 160.62 1093.42 1408.21 Num. Valid Values 24 24 24 24 Avg. Values 37.50 6.69 45.56 58.68 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.05 258.44 45.56 121.08 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5444 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.6465 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 = 0.4507 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5493 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0883 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 = 4.1892 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.1254 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.091 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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