Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 03Dec2017 8 a.m. 58.82 7.02 96.49 35.00 03Dec2017 9 a.m. 61.34 8.05 88.30 241.00 03Dec2017 10 a.m. 63.12 8.66 87.03 209.00 03Dec2017 11 a.m. 65.75 10.97 83.85 386.00 03Dec2017 12 p.m. 68.94 11.16 75.60 536.00 03Dec2017 1 p.m. 71.78 14.47 67.60 613.00 03Dec2017 2 p.m. 73.65 13.37 59.42 419.00 03Dec2017 3 p.m. 74.43 14.88 51.29 308.00 03Dec2017 4 p.m. 74.10 14.32 50.38 198.00 03Dec2017 5 p.m. 73.54 9.79 52.15 26.00 03Dec2017 6 p.m. 72.45 10.12 52.58 -2.00 03Dec2017 7 p.m. 72.34 14.48 85.12 -3.00 03Dec2017 8 p.m. 69.15 14.21 60.09 -3.00 03Dec2017 9 p.m. 67.50 11.94 65.16 -2.00 03Dec2017 10 p.m. 66.72 13.36 64.24 -3.00 03Dec2017 11 p.m. 64.63 11.72 69.49 -2.00 04Dec2017 12 a.m. 63.21 9.79 77.31 -2.00 04Dec2017 1 a.m. 62.01 10.84 84.57 -3.00 04Dec2017 2 a.m. 61.66 10.40 93.42 -3.00 04Dec2017 3 a.m. 62.22 9.49 98.99 -2.00 04Dec2017 4 a.m. 62.02 8.86 99.06 -3.00 04Dec2017 5 a.m. 61.90 9.82 99.23 -2.00 04Dec2017 6 a.m. 62.55 10.76 99.35 -3.00 04Dec2017 7 a.m. 63.43 10.87 99.35 -2.00 Accuml. Values 1597.26 269.35 1860.07 2936.00 Num. Valid Values 24 24 24 24 Avg. Values 66.55 11.22 77.50 122.33 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 19.20 433.38 77.50 252.44 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2250 definition: xcompl = 1 - (RELH_avg/100) TdC = 15.2220 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 = 0.6773 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3227 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.1481 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 = 4.9417 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.8406 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.144 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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