Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. -901.00 -901.00 -901.00 -901.00 29Dec2017 9 a.m. -901.00 -901.00 -901.00 -901.00 29Dec2017 10 a.m. -901.00 -901.00 -901.00 -901.00 29Dec2017 11 a.m. 37.27 13.16 53.26 185.00 29Dec2017 12 p.m. 39.16 10.76 54.73 165.00 29Dec2017 1 p.m. 40.80 13.80 57.47 233.00 29Dec2017 2 p.m. 42.01 12.42 52.52 148.00 29Dec2017 3 p.m. 43.02 11.03 57.54 135.00 29Dec2017 4 p.m. 43.77 10.96 58.63 63.00 29Dec2017 5 p.m. 43.86 5.83 58.99 13.00 29Dec2017 6 p.m. -901.00 -901.00 -901.00 -901.00 29Dec2017 7 p.m. -901.00 -901.00 -901.00 -901.00 29Dec2017 8 p.m. -901.00 -901.00 -901.00 -901.00 29Dec2017 9 p.m. -901.00 -901.00 -901.00 -901.00 29Dec2017 10 p.m. -901.00 -901.00 -901.00 -901.00 29Dec2017 11 p.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 12 a.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 1 a.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 2 a.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 3 a.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 4 a.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 5 a.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 6 a.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 7 a.m. -901.00 -901.00 -901.00 -901.00 Accuml. Values 289.90 77.96 393.14 942.00 Num. Valid Values 7 7 7 7 Avg. Values 41.41 11.14 56.16 134.57 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.23 430.07 56.16 277.69 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4384 definition: xcompl = 1 - (RELH_avg/100) TdC = -2.7848 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 = 0.4841 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5159 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.7811 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 = 3.9027 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.5257 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.146 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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