Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 11.10 0.60 51.33 0.00 02Jan2018 9 a.m. 11.14 0.50 51.44 36.50 02Jan2018 10 a.m. 13.21 1.60 47.91 141.20 02Jan2018 11 a.m. 14.56 3.20 44.04 362.60 02Jan2018 12 p.m. 15.33 5.20 43.00 463.70 02Jan2018 1 p.m. 16.27 7.50 44.06 327.90 02Jan2018 2 p.m. 17.85 7.80 43.58 313.30 02Jan2018 3 p.m. 19.17 8.50 41.64 245.50 02Jan2018 4 p.m. 20.19 4.40 38.84 104.80 02Jan2018 5 p.m. 21.09 4.70 38.03 67.00 02Jan2018 6 p.m. 21.06 3.70 37.40 5.30 02Jan2018 7 p.m. 34.18 2.40 41.03 0.00 02Jan2018 8 p.m. 16.92 5.80 41.43 0.00 02Jan2018 9 p.m. 15.84 6.80 44.70 0.00 02Jan2018 10 p.m. 16.12 8.40 46.30 0.00 02Jan2018 11 p.m. 16.84 7.80 45.10 0.00 03Jan2018 12 a.m. 16.41 8.10 48.26 0.00 03Jan2018 1 a.m. 16.74 10.10 50.09 0.00 03Jan2018 2 a.m. 16.97 11.60 54.45 0.00 03Jan2018 3 a.m. 17.46 14.40 58.83 0.00 03Jan2018 4 a.m. 16.81 9.90 61.99 0.00 03Jan2018 5 a.m. 17.31 11.30 61.63 0.00 03Jan2018 6 a.m. 18.00 9.80 63.29 0.00 03Jan2018 7 a.m. 18.18 5.90 66.83 0.00 Accuml. Values 418.73 160.00 1165.20 2067.80 Num. Valid Values 24 24 24 24 Avg. Values 17.45 6.67 48.55 86.16 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.09 257.44 48.55 177.79 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5145 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.0849 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 = 0.2832 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7168 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.4220 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 = 1.7333 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.8929 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.058 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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