Detailed Weather Data for Project: WDMA

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 29.16 1.50 68.18 0.00 29Dec2017 9 a.m. 29.82 1.40 64.86 11.50 29Dec2017 10 a.m. 31.17 1.80 61.95 74.70 29Dec2017 11 a.m. 32.45 2.30 60.63 106.30 29Dec2017 12 p.m. 34.68 2.10 58.95 136.10 29Dec2017 1 p.m. 37.58 2.50 55.73 294.50 29Dec2017 2 p.m. 40.64 2.50 51.86 226.00 29Dec2017 3 p.m. 41.95 3.20 51.79 110.80 29Dec2017 4 p.m. 42.80 3.10 52.49 51.00 29Dec2017 5 p.m. 44.44 5.20 57.51 7.30 29Dec2017 6 p.m. 44.42 2.90 62.62 0.00 29Dec2017 7 p.m. 32.25 6.10 73.19 0.00 29Dec2017 8 p.m. 43.34 0.60 65.04 0.00 29Dec2017 9 p.m. 42.51 0.50 67.13 0.00 29Dec2017 10 p.m. 41.77 1.10 69.25 0.00 29Dec2017 11 p.m. 42.31 0.80 66.97 0.00 30Dec2017 12 a.m. 41.63 0.40 68.85 0.00 30Dec2017 1 a.m. 40.89 0.10 72.33 0.00 30Dec2017 2 a.m. 40.86 0.40 72.72 0.00 30Dec2017 3 a.m. 40.73 0.90 75.78 0.00 30Dec2017 4 a.m. 40.10 0.80 77.50 0.00 30Dec2017 5 a.m. 40.30 0.40 77.53 0.00 30Dec2017 6 a.m. 40.80 2.10 76.59 0.00 30Dec2017 7 a.m. 41.45 2.80 74.99 0.00 Accuml. Values 938.06 45.50 1584.44 1018.20 Num. Valid Values 24 24 24 24 Avg. Values 39.09 1.90 66.02 42.42 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.94 73.21 66.02 87.54 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3398 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.7938 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 = 0.4643 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5357 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2191 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 = 2.7515 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5408 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.028 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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