Detailed Weather Data for Project: TOMS

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 4.96 17.28 66.25 9.00 01Jan2018 9 a.m. 5.42 15.58 64.67 135.00 01Jan2018 10 a.m. 8.60 13.09 57.25 320.00 01Jan2018 11 a.m. 11.54 14.17 52.67 462.67 01Jan2018 12 p.m. 15.31 11.46 46.75 566.25 01Jan2018 1 p.m. 17.54 10.59 41.67 602.67 01Jan2018 2 p.m. 19.40 8.39 38.00 572.75 01Jan2018 3 p.m. 20.66 8.22 36.75 480.00 01Jan2018 4 p.m. 20.75 8.44 38.25 341.00 01Jan2018 5 p.m. 19.58 6.82 40.50 161.00 01Jan2018 6 p.m. 16.70 7.83 48.00 0.00 01Jan2018 7 p.m. 15.80 8.95 51.00 0.00 01Jan2018 8 p.m. 15.26 8.28 52.00 0.00 01Jan2018 9 p.m. 14.54 6.04 55.50 0.00 01Jan2018 10 p.m. 13.34 6.19 56.67 0.00 01Jan2018 11 p.m. 12.70 7.21 57.00 0.00 02Jan2018 12 a.m. 11.53 6.43 61.25 0.00 02Jan2018 1 a.m. 10.72 7.27 61.25 0.00 02Jan2018 2 a.m. 10.40 6.04 63.00 0.00 02Jan2018 3 a.m. 10.40 7.61 64.00 0.00 02Jan2018 4 a.m. 10.13 5.54 65.50 0.00 02Jan2018 5 a.m. 9.86 7.16 66.50 0.00 02Jan2018 6 a.m. 10.04 4.59 68.50 0.00 02Jan2018 7 a.m. 11.84 5.70 66.50 0.00 Accuml. Values 317.02 208.88 1319.43 3650.34 Num. Valid Values 24 24 24 24 Avg. Values 13.21 8.70 54.98 152.10 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.44 336.09 54.98 313.86 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4502 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.7593 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 = 0.2510 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7490 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.6048 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 = 1.2564 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.7049 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.066 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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