Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 02Dec2017 8 a.m. 50.81 3.14 89.90 18.00 02Dec2017 9 a.m. 56.07 6.11 82.62 237.00 02Dec2017 10 a.m. 60.58 7.17 77.99 416.00 02Dec2017 11 a.m. 65.30 3.20 63.20 490.00 02Dec2017 12 p.m. 69.15 2.21 54.97 555.00 02Dec2017 1 p.m. 71.13 3.42 59.36 551.00 02Dec2017 2 p.m. 72.12 7.26 57.83 459.00 02Dec2017 3 p.m. 72.99 10.67 53.68 322.00 02Dec2017 4 p.m. 73.44 7.73 52.76 157.00 02Dec2017 5 p.m. 72.45 6.84 56.30 47.00 02Dec2017 6 p.m. 71.26 5.32 56.61 -2.00 02Dec2017 7 p.m. 70.23 12.62 57.64 -2.00 02Dec2017 8 p.m. 68.38 7.74 62.47 -3.00 02Dec2017 9 p.m. 66.40 8.04 71.26 -2.00 02Dec2017 10 p.m. 64.09 7.80 79.20 -3.00 02Dec2017 11 p.m. 63.64 9.72 79.26 -2.00 03Dec2017 12 a.m. 62.44 8.57 85.92 -3.00 03Dec2017 1 a.m. 61.90 10.23 86.22 -3.00 03Dec2017 2 a.m. 61.45 7.45 87.81 -2.00 03Dec2017 3 a.m. 61.02 9.08 86.41 -3.00 03Dec2017 4 a.m. 60.24 7.82 90.74 -2.00 03Dec2017 5 a.m. 59.04 3.92 94.04 -2.00 03Dec2017 6 a.m. 58.05 6.49 96.67 -2.00 03Dec2017 7 a.m. 58.37 6.85 97.46 -3.00 Accuml. Values 1550.53 169.40 1780.32 3218.00 Num. Valid Values 24 24 24 24 Avg. Values 64.61 7.06 74.18 134.08 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 18.11 272.56 74.18 276.68 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2582 definition: xcompl = 1 - (RELH_avg/100) TdC = 13.5122 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 = 0.6642 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3358 definition: del_lambda2 = 1 - del_lambda1 Qn = 2.4138 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 = 5.2989 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.2508 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.133 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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