Detailed Weather Data for Project: WAUR

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 46.36 0.00 37.05 3.00 05Dec2017 9 a.m. 49.44 0.00 39.56 20.00 05Dec2017 10 a.m. 72.73 0.00 48.65 55.00 05Dec2017 11 a.m. 69.22 0.00 51.21 80.00 05Dec2017 12 p.m. 75.15 0.00 53.17 119.00 05Dec2017 1 p.m. 63.61 0.00 47.25 191.00 05Dec2017 2 p.m. 67.24 0.00 44.99 306.00 05Dec2017 3 p.m. 52.41 0.00 36.75 215.00 05Dec2017 4 p.m. 64.38 0.00 39.98 97.00 05Dec2017 5 p.m. 71.74 0.00 45.11 34.00 05Dec2017 6 p.m. 77.90 0.00 49.08 3.00 05Dec2017 7 p.m. 76.91 0.00 59.27 0.00 05Dec2017 8 p.m. 85.91 0.00 61.84 0.00 05Dec2017 9 p.m. 71.74 0.00 49.69 0.00 05Dec2017 10 p.m. 81.19 0.00 61.41 0.00 05Dec2017 11 p.m. 86.25 0.00 75.88 0.00 06Dec2017 12 a.m. 48.56 0.00 40.47 0.00 06Dec2017 1 a.m. 46.47 0.00 46.33 0.00 06Dec2017 2 a.m. 42.08 0.00 44.93 0.00 06Dec2017 3 a.m. 45.05 0.00 39.43 0.00 06Dec2017 4 a.m. 45.37 0.00 41.20 0.00 06Dec2017 5 a.m. 43.61 0.00 44.87 0.00 06Dec2017 6 a.m. 40.98 0.00 42.85 0.00 06Dec2017 7 a.m. 41.63 0.00 41.14 0.00 Accuml. Values 1465.97 0.00 1142.11 1123.00 Num. Valid Values 24 0 24 24 Avg. Values 61.08 47.59 46.79 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 16.16 0.00 47.59 96.56 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5241 definition: xcompl = 1 - (RELH_avg/100) TdC = 4.9943 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 = 0.6397 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3603 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0747 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 = 9.6514 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.0881 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.046 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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