Detailed Weather Data for Project: ARBU

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 39.56 16.05 32.25 4.75 05Dec2017 9 a.m. 39.14 14.39 32.67 22.33 05Dec2017 10 a.m. 39.38 11.41 32.00 43.75 05Dec2017 11 a.m. 39.44 9.47 32.00 91.67 05Dec2017 12 p.m. 40.37 13.59 29.00 195.00 05Dec2017 1 p.m. 41.54 12.08 28.00 240.00 05Dec2017 2 p.m. 42.84 12.81 25.75 271.50 05Dec2017 3 p.m. 43.88 7.72 26.25 282.50 05Dec2017 4 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 5 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 6 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 7 p.m. -901.00 -901.00 -901.00 -901.00 05Dec2017 8 p.m. 37.40 0.89 51.00 0.00 05Dec2017 9 p.m. 37.22 2.91 59.00 0.00 05Dec2017 10 p.m. 36.23 2.01 62.00 0.00 05Dec2017 11 p.m. 35.82 1.79 63.25 0.00 06Dec2017 12 a.m. 35.33 1.79 67.25 0.00 06Dec2017 1 a.m. 34.16 1.17 70.75 0.00 06Dec2017 2 a.m. 33.75 1.12 77.75 0.00 06Dec2017 3 a.m. 34.28 1.42 77.00 0.00 06Dec2017 4 a.m. 34.34 2.52 76.00 0.00 06Dec2017 5 a.m. 34.61 2.80 71.50 0.00 06Dec2017 6 a.m. 34.97 1.17 66.25 0.00 06Dec2017 7 a.m. 34.16 1.01 75.50 0.00 Accuml. Values 748.42 118.12 1055.17 1151.50 Num. Valid Values 20 20 20 20 Avg. Values 37.42 5.91 52.76 57.58 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.01 228.07 52.76 118.81 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4724 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.7140 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 = 0.4500 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5500 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0657 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 = 3.6112 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.3475 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.074 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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