Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 39.60 1.19 48.31 15.00 06Dec2017 9 a.m. 39.92 2.48 63.58 78.00 06Dec2017 10 a.m. 43.00 5.35 44.64 172.00 06Dec2017 11 a.m. 45.86 4.33 33.71 237.00 06Dec2017 12 p.m. 48.60 6.63 26.93 261.00 06Dec2017 1 p.m. 51.22 5.25 25.10 295.00 06Dec2017 2 p.m. 51.78 6.53 24.73 201.00 06Dec2017 3 p.m. 52.32 5.63 24.30 168.00 06Dec2017 4 p.m. 51.57 4.38 25.53 101.00 06Dec2017 5 p.m. 50.47 1.22 31.94 18.00 06Dec2017 6 p.m. 48.15 2.80 37.13 -2.00 06Dec2017 7 p.m. 33.76 9.50 36.40 -3.00 06Dec2017 8 p.m. 47.50 0.79 31.57 -2.00 06Dec2017 9 p.m. 45.19 2.82 39.08 -2.00 06Dec2017 10 p.m. 43.21 2.70 44.94 -3.00 06Dec2017 11 p.m. 41.58 3.28 47.39 -2.00 07Dec2017 12 a.m. 40.24 4.22 51.78 -3.00 07Dec2017 1 a.m. 39.04 1.99 53.38 -2.00 07Dec2017 2 a.m. 38.37 0.94 53.80 -2.00 07Dec2017 3 a.m. 37.38 2.08 57.71 -3.00 07Dec2017 4 a.m. 36.72 2.65 59.78 -3.00 07Dec2017 5 a.m. 35.29 4.05 67.24 -3.00 07Dec2017 6 a.m. 33.66 5.89 75.61 -2.00 07Dec2017 7 a.m. 34.41 8.60 70.90 -3.00 Accuml. Values 1028.84 95.30 1075.48 1511.00 Num. Valid Values 24 24 24 24 Avg. Values 42.87 3.97 44.81 62.96 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.04 153.34 44.81 129.92 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5519 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.1378 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 = 0.4964 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5036 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.2312 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 = 5.2273 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.7063 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.078 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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