Detailed Weather Data for Project: MERE

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 3.33 3.00 65.00 11.00 07Nov2017 9 a.m. 5.00 5.00 54.00 68.00 07Nov2017 10 a.m. 6.11 8.00 48.00 156.00 07Nov2017 11 a.m. 7.22 9.00 50.00 220.00 07Nov2017 12 p.m. 8.89 10.00 47.00 372.00 07Nov2017 1 p.m. 8.33 9.00 42.00 345.00 07Nov2017 2 p.m. 9.44 9.00 36.00 374.00 07Nov2017 3 p.m. 7.78 9.00 36.00 225.00 07Nov2017 4 p.m. 7.22 7.00 34.00 126.00 07Nov2017 5 p.m. 6.11 7.00 34.00 46.00 07Nov2017 6 p.m. -901.00 -901.00 -901.00 -901.00 07Nov2017 7 p.m. 5.00 3.00 69.00 2.00 07Nov2017 8 p.m. 3.89 8.00 41.00 0.00 07Nov2017 9 p.m. 3.89 5.00 42.00 0.00 07Nov2017 10 p.m. 2.78 6.00 48.00 0.00 07Nov2017 11 p.m. 2.22 4.00 53.00 0.00 08Nov2017 12 a.m. -0.56 8.00 89.00 0.00 08Nov2017 1 a.m. -1.11 6.00 92.00 0.00 08Nov2017 2 a.m. -1.11 4.00 96.00 0.00 08Nov2017 3 a.m. -1.67 4.00 96.00 0.00 08Nov2017 4 a.m. -1.67 4.00 96.00 0.00 08Nov2017 5 a.m. -1.67 3.00 95.00 0.00 08Nov2017 6 a.m. -1.67 0.00 95.00 0.00 08Nov2017 7 a.m. -1.11 1.00 94.00 1.00 Accuml. Values 76.67 132.00 1452.00 1946.00 Num. Valid Values 23 22 23 23 Avg. Values 3.33 6.00 63.13 84.61 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -15.93 231.70 63.13 174.59 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3687 definition: xcompl = 1 - (RELH_avg/100) TdC = -21.3040 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 = 0.1835 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8165 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.3107 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 = 0.6544 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.7518 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.026 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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