Detailed Weather Data for Project: WAUR

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 9 a.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 10 a.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 11 a.m. 27.03 -901.00 96.26 -901.00 30Dec2017 12 p.m. 25.93 25.45 96.39 92.00 30Dec2017 1 p.m. 25.59 22.38 95.04 85.00 30Dec2017 2 p.m. 25.59 16.46 95.59 83.00 30Dec2017 3 p.m. 25.70 16.67 94.31 73.00 30Dec2017 4 p.m. 24.84 -901.00 94.19 52.00 30Dec2017 5 p.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 6 p.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 7 p.m. 22.30 13.16 61.29 0.00 30Dec2017 8 p.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 9 p.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 10 p.m. -901.00 -901.00 -901.00 -901.00 30Dec2017 11 p.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 12 a.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 1 a.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 2 a.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 3 a.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 4 a.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 5 a.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 6 a.m. -901.00 -901.00 -901.00 -901.00 31Dec2017 7 a.m. -901.00 -901.00 -901.00 -901.00 Accuml. Values 176.98 94.12 633.07 385.00 Num. Valid Values 7 5 7 6 Avg. Values 25.28 18.82 90.44 64.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -3.73 726.91 90.44 132.41 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0956 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.0952 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 = 0.3466 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.6534 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.0872 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 = 0.4564 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.2677 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.034 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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