Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 45.75 13.00 57.29 79.80 05Mar2018 9 a.m. 47.26 15.60 51.32 328.40 05Mar2018 10 a.m. 50.11 21.80 36.73 558.20 05Mar2018 11 a.m. 52.66 22.60 25.98 739.90 05Mar2018 12 p.m. 54.64 21.60 19.99 859.90 05Mar2018 1 p.m. 56.17 18.90 16.37 902.70 05Mar2018 2 p.m. 57.63 18.00 14.03 887.40 05Mar2018 3 p.m. 59.11 16.30 13.29 780.20 05Mar2018 4 p.m. 59.43 18.50 12.95 586.20 05Mar2018 5 p.m. 59.56 15.60 12.04 394.70 05Mar2018 6 p.m. 58.71 12.80 12.39 161.20 05Mar2018 7 p.m. 46.60 19.00 28.16 5.00 05Mar2018 8 p.m. 51.78 1.70 19.58 0.00 05Mar2018 9 p.m. 47.26 1.60 32.15 0.00 05Mar2018 10 p.m. 44.13 1.40 29.64 0.00 05Mar2018 11 p.m. 44.96 4.50 40.62 0.00 06Mar2018 12 a.m. 42.73 6.50 38.00 0.00 06Mar2018 1 a.m. 41.74 6.90 33.53 0.00 06Mar2018 2 a.m. 40.17 5.80 35.80 0.00 06Mar2018 3 a.m. 39.85 6.70 37.31 0.00 06Mar2018 4 a.m. 37.24 5.70 38.39 0.00 06Mar2018 5 a.m. 36.46 7.40 40.51 0.00 06Mar2018 6 a.m. 38.43 9.50 41.37 0.00 06Mar2018 7 a.m. 38.73 11.30 43.01 0.00 Accuml. Values 1151.13 282.70 730.45 6283.60 Num. Valid Values 24 24 24 24 Avg. Values 47.96 11.78 30.44 261.82 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.87 454.86 30.44 540.26 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6956 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.7231 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 = 0.5387 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4613 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.3045 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 = 7.9899 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.8284 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.309 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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