Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 34.21 1.24 61.11 21.30 06Dec2017 9 a.m. 36.28 2.73 52.58 172.17 06Dec2017 10 a.m. 38.82 3.02 48.18 277.19 06Dec2017 11 a.m. 42.89 1.92 43.85 447.30 06Dec2017 12 p.m. 46.63 2.21 40.74 513.72 06Dec2017 1 p.m. 49.28 5.25 38.58 520.20 06Dec2017 2 p.m. 51.17 8.69 35.87 467.69 06Dec2017 3 p.m. 51.96 8.52 34.48 362.12 06Dec2017 4 p.m. 52.52 8.45 32.70 214.72 06Dec2017 5 p.m. 51.93 9.68 33.97 53.22 06Dec2017 6 p.m. 49.48 8.86 38.66 0.00 06Dec2017 7 p.m. 32.04 5.92 46.69 0.00 06Dec2017 8 p.m. 45.09 5.81 42.22 0.00 06Dec2017 9 p.m. 43.92 5.01 38.54 0.00 06Dec2017 10 p.m. 42.94 3.53 36.30 0.00 06Dec2017 11 p.m. 42.01 4.03 39.08 0.00 07Dec2017 12 a.m. 41.56 12.03 51.99 0.00 07Dec2017 1 a.m. 38.95 12.03 62.34 0.00 07Dec2017 2 a.m. 36.81 14.73 70.64 0.00 07Dec2017 3 a.m. 33.91 14.79 67.95 0.00 07Dec2017 4 a.m. 31.95 13.74 63.75 0.00 07Dec2017 5 a.m. 30.09 10.48 66.79 0.00 07Dec2017 6 a.m. 27.54 12.61 69.47 0.00 07Dec2017 7 a.m. 26.15 11.15 73.77 0.00 Accuml. Values 978.11 186.43 1190.25 3049.63 Num. Valid Values 24 24 24 24 Avg. Values 40.75 7.77 49.59 127.07 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.86 299.97 49.59 262.21 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5041 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.8350 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 = 0.4785 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5215 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.5943 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 = 4.3930 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 4.7445 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.127 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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