Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 63.68 12.70 82.35 3.10 04Dec2017 9 a.m. 63.91 13.40 80.84 108.00 04Dec2017 10 a.m. 65.55 15.60 73.47 308.80 04Dec2017 11 a.m. 67.17 18.00 60.38 403.20 04Dec2017 12 p.m. 65.79 21.80 50.08 469.10 04Dec2017 1 p.m. 64.78 15.30 37.50 360.30 04Dec2017 2 p.m. 63.43 13.30 37.70 328.80 04Dec2017 3 p.m. 65.37 18.10 22.11 418.50 04Dec2017 4 p.m. 63.30 18.70 17.22 251.60 04Dec2017 5 p.m. 59.90 17.40 21.17 52.90 04Dec2017 6 p.m. 57.40 11.50 26.17 0.00 04Dec2017 7 p.m. 43.45 9.20 28.58 0.00 04Dec2017 8 p.m. 50.34 15.70 33.60 0.00 04Dec2017 9 p.m. 47.41 18.10 38.67 0.00 04Dec2017 10 p.m. 44.73 13.50 41.77 0.00 04Dec2017 11 p.m. 42.94 14.30 37.59 0.00 05Dec2017 12 a.m. 40.87 13.50 34.71 0.00 05Dec2017 1 a.m. 38.97 16.30 27.54 0.00 05Dec2017 2 a.m. 37.20 12.80 23.23 0.00 05Dec2017 3 a.m. 35.24 9.80 25.09 0.00 05Dec2017 4 a.m. 33.55 9.20 30.34 0.00 05Dec2017 5 a.m. 33.10 7.70 32.77 0.00 05Dec2017 6 a.m. 33.22 5.00 32.81 0.00 05Dec2017 7 a.m. 33.24 5.50 33.04 0.00 Accuml. Values 1214.54 326.40 928.73 2704.30 Num. Valid Values 24 24 24 24 Avg. Values 50.61 13.60 38.70 112.68 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.34 525.18 38.70 232.52 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6130 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.2448 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 = 0.5601 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4399 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.4793 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 = 7.7721 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 11.8072 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.237 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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