2008 ET Toolbox - NMSU Mod. Penman Equation USU - Daily ET Model ----------------------------------------- --------------------------------- DOY Date Ref. ET (in) GDD SumGDD Kc ET(in) Daytime ET (mm) Daytime ET (in) 96 Apr 5 0.53 5.31 5.3 0.05 0.03 0.762 0.030 97 Apr 6 0.48 5.03 10.3 0.07 0.03 0.762 0.030 98 Apr 7 0.54 5.86 16.2 0.08 0.04 1.016 0.040 99 Apr 8 0.51 4.75 20.9 0.09 0.05 1.270 0.050 100 Apr 9 0.31 2.25 23.2 0.10 0.03 0.762 0.030 101 Apr 10 0.25 0.31 23.5 0.10 0.02 0.508 0.020 102 Apr 11 0.27 2.25 25.8 0.10 0.03 0.762 0.030 103 Apr 12 0.21 1.69 27.4 0.11 0.02 0.508 0.020 104 Apr 13 0.28 3.92 31.4 0.12 0.03 0.762 0.030 105 Apr 14 0.30 5.58 36.9 0.13 0.04 1.016 0.040 106 Apr 15 0.40 7.53 44.5 0.15 0.06 1.524 0.060 107 Apr 16 0.41 6.14 50.6 0.17 0.07 1.778 0.070 108 Apr 17 0.32 0.58 51.2 0.17 0.05 1.270 0.050 109 Apr 18 0.25 4.47 55.7 0.18 0.04 1.016 0.040 110 Apr 19 0.50 6.97 62.6 0.20 0.10 2.540 0.100 111 Apr 20 0.38 6.42 69.1 0.21 0.08 2.032 0.080 112 Apr 21 0.33 6.42 75.5 0.23 0.07 1.778 0.070 113 Apr 22 0.35 6.97 82.4 0.24 0.08 2.032 0.080 114 Apr 23 0.34 7.53 90.0 0.26 0.09 2.286 0.090 115 Apr 24 0.37 7.25 97.2 0.28 0.10 2.540 0.100 116 Apr 25 0.32 4.47 101.7 0.29 0.09 2.286 0.090 117 Apr 26 0.49 6.14 107.8 0.30 0.15 3.810 0.150 118 Apr 27 0.30 2.53 110.4 0.31 0.09 2.286 0.090 119 Apr 28 0.32 4.75 115.1 0.32 0.10 2.540 0.100 120 Apr 29 0.53 7.25 122.4 0.33 0.18 4.572 0.180 121 Apr 30 0.57 7.53 129.9 0.35 0.20 5.080 0.200 122 May 1 0.43 5.58 135.5 0.36 0.16 4.064 0.160 123 May 2 0.30 3.92 139.4 0.37 0.11 2.794 0.110 124 May 3 0.35 5.03 144.4 0.38 0.13 3.302 0.130 125 May 4 0.53 7.53 152.0 0.40 0.21 5.334 0.210 126 May 5 0.54 7.53 159.5 0.41 0.22 5.588 0.220 127 May 6 0.57 6.42 165.9 0.43 0.24 6.096 0.240 128 May 7 0.53 6.97 172.9 0.44 0.23 5.842 0.230 129 May 8 0.52 6.69 179.6 0.45 0.24 6.096 0.240 130 May 9 0.54 6.97 186.5 0.47 0.25 6.350 0.250 131 May 10 0.36 7.81 194.3 0.48 0.17 4.318 0.170 132 May 11 0.43 6.97 201.3 0.50 0.21 5.334 0.210 133 May 12 0.61 7.81 209.1 0.51 0.31 7.874 0.310 134 May 13 0.60 6.14 215.3 0.52 0.31 7.874 0.310 135 May 14 0.37 2.53 217.8 0.53 0.20 5.080 0.200 136 May 15 0.27 1.97 219.8 0.53 0.14 3.556 0.140 137 May 16 0.29 3.36 223.1 0.54 0.16 4.064 0.160 138 May 17 0.45 4.75 227.9 0.55 0.25 6.350 0.250 139 May 18 0.32 8.08 235.9 0.56 0.18 4.572 0.180 140 May 19 0.37 10.31 246.2 0.58 0.21 5.334 0.210 141 May 20 0.38 11.14 257.4 0.60 0.23 5.842 0.230 142 May 21 0.60 9.19 266.6 0.61 0.37 9.398 0.370 143 May 22 0.42 4.47 271.1 0.62 0.26 6.604 0.260 144 May 23 0.37 1.69 272.8 0.62 0.23 5.842 0.230 145 May 24 0.36 5.58 278.3 0.63 0.23 5.842 0.230 146 May 25 0.42 8.08 286.4 0.65 0.27 6.858 0.270 147 May 26 0.43 8.08 294.5 0.66 0.28 7.112 0.280 148 May 27 0.38 8.08 302.6 0.67 0.26 6.604 0.260 149 May 28 0.65 8.92 311.5 0.68 0.45 11.430 0.450 150 May 29 0.45 9.47 321.0 0.70 0.31 7.874 0.310 151 May 30 0.42 9.75 330.7 0.71 0.30 7.620 0.300 152 May 31 0.41 10.58 341.3 0.73 0.30 7.620 0.300 153 June 1 0.42 11.14 352.5 0.74 0.31 7.874 0.310 154 June 2 0.47 11.14 363.6 0.76 0.35 8.890 0.350 155 June 3 0.46 10.58 374.2 0.77 0.35 8.890 0.350 156 June 4 0.56 8.92 383.1 0.78 0.44 11.176 0.440 157 June 5 0.48 7.00 390.1 0.79 0.38 9.652 0.380 158 June 6 0.38 8.64 398.7 0.80 0.30 7.620 0.300 159 June 7 0.49 10.86 409.6 0.81 0.40 10.160 0.400 160 June 8 0.43 10.31 419.9 0.82 0.35 8.890 0.350 161 June 9 0.41 9.47 429.4 0.83 0.34 8.636 0.340 162 June 10 0.47 10.86 440.2 0.84 0.39 9.906 0.390 163 June 11 0.49 10.31 450.5 0.85 0.42 10.668 0.420 164 June 12 0.43 10.31 460.8 0.86 0.37 9.398 0.370 165 June 13 0.43 10.03 470.9 0.87 0.37 9.398 0.370 166 June 14 0.46 11.97 482.8 0.88 0.40 10.160 0.400 167 June 15 0.47 12.81 495.6 0.89 0.42 10.668 0.420 168 June 16 0.42 11.97 507.6 0.90 0.38 8.053 0.317 169 June 17 0.42 14.23 521.8 0.91 0.38 8.271 0.326 170 June 18 0.46 13.94 535.8 0.92 0.42 8.448 0.333 171 June 19 0.41 11.97 547.8 0.92 0.38 8.408 0.331 172 June 20 0.62 11.44 559.2 0.93 0.58 7.790 0.307 173 June 21 0.48 9.19 568.4 0.93 0.45 6.430 0.253 174 June 22 0.43 10.03 578.4 0.94 0.40 7.898 0.311 175 June 23 0.64 11.17 589.6 0.95 0.61 8.192 0.323 176 June 24 0.58 10.34 599.9 0.95 0.55 7.609 0.300 177 June 25 0.52 10.31 610.2 0.96 0.50 6.487 0.255 178 June 26 0.42 11.44 621.7 0.96 0.40 7.131 0.281 179 June 27 0.44 10.61 632.3 0.97 0.42 5.611 0.221 180 June 28 0.56 10.86 643.1 0.97 0.54 7.109 0.280 181 June 29 0.44 8.94 652.1 0.97 0.43 6.224 0.245 182 June 30 0.38 10.03 662.1 0.98 0.37 8.233 0.324 183 July 1 0.51 9.75 671.9 0.98 0.50 7.484 0.295 184 July 2 0.38 10.31 682.2 0.98 0.37 8.336 0.328 185 July 3 0.40 10.03 692.2 0.99 0.39 8.103 0.319 186 July 4 0.38 10.58 702.8 0.99 0.38 8.650 0.341 187 July 5 0.42 12.00 714.8 0.99 0.42 8.405 0.331 188 July 6 0.52 10.58 725.4 1.00 0.52 6.447 0.254 189 July 7 0.36 9.23 734.6 1.00 0.36 5.201 0.205 190 July 8 0.40 8.39 743.0 1.00 0.40 5.262 0.207 191 July 9 0.31 7.56 750.5 1.00 0.31 3.588 0.141 192 July 10 0.08 3.67 754.2 1.00 0.08 1.219 0.048 193 July 11 0.31 6.44 760.7 1.00 0.31 4.663 0.184 194 July 12 0.32 8.94 769.6 1.01 0.32 4.827 0.190 195 July 13 0.28 5.33 774.9 1.01 0.28 3.357 0.132 196 July 14 0.45 7.56 782.5 1.01 0.45 6.422 0.253 197 July 15 0.42 8.94 791.4 1.01 0.42 6.359 0.250 198 July 16 0.40 10.61 802.0 1.01 0.40 6.244 0.246 199 July 17 0.51 12.00 814.0 1.01 0.52 7.624 0.300 200 July 18 0.42 12.00 826.0 1.01 0.43 5.510 0.217 201 July 19 0.51 9.50 835.5 1.02 0.52 5.713 0.225 202 July 20 0.41 8.39 843.9 1.02 0.42 6.883 0.271 203 July 21 0.44 9.50 853.4 1.02 0.45 6.617 0.261 204 July 22 0.41 10.89 864.3 1.02 0.42 5.972 0.235 205 July 23 0.38 10.34 874.7 1.02 0.39 9.131 0.360 206 July 24 0.38 10.61 885.3 1.02 0.39 8.286 0.326 207 July 25 0.51 11.44 896.7 1.02 0.52 6.948 0.274 208 July 26 0.21 7.00 903.7 1.02 0.21 3.119 0.123 209 July 27 0.36 8.11 911.8 1.02 0.37 3.985 0.157 210 July 28 0.36 10.33 922.2 1.02 0.37 8.808 0.347 211 July 29 0.40 12.00 934.2 1.03 0.41 8.127 0.320 212 July 30 0.40 11.44 945.6 1.03 0.41 8.229 0.324 213 July 31 0.57 11.73 957.3 1.03 0.59 7.780 0.306 214 Aug 1 0.39 11.14 968.5 1.03 0.40 8.548 0.337 215 Aug 2 0.40 10.86 979.3 1.03 0.41 7.917 0.312 216 Aug 3 0.40 10.06 989.4 1.03 0.41 8.439 0.332 217 Aug 4 0.52 9.23 998.6 1.03 0.53 7.488 0.295 218 Aug 5 0.45 9.78 1008.4 1.03 0.46 5.621 0.221 219 Aug 6 0.37 10.03 1018.4 1.03 0.38 7.482 0.295 220 Aug 7 0.48 10.89 1029.3 1.03 0.49 5.680 0.224 221 Aug 8 0.53 9.78 1039.1 1.03 0.54 7.709 0.304 222 Aug 9 0.43 9.78 1048.9 1.02 0.44 6.117 0.241 223 Aug 10 0.43 10.89 1059.8 1.02 0.44 4.948 0.195 224 Aug 11 0.40 12.00 1071.8 1.02 0.41 8.276 0.326 225 Aug 12 0.45 10.06 1081.8 1.02 0.46 6.401 0.252 226 Aug 13 0.40 10.06 1091.9 1.02 0.41 6.866 0.270 227 Aug 14 0.42 9.78 1101.6 1.02 0.43 5.390 0.212 228 Aug 15 0.51 9.47 1111.1 1.01 0.52 6.333 0.249 229 Aug 16 0.46 7.25 1118.4 1.01 0.47 5.711 0.225 230 Aug 17 0.46 6.97 1125.3 1.01 0.46 6.612 0.260 231 Aug 18 0.36 8.08 1133.4 1.01 0.36 7.509 0.296 232 Aug 19 0.52 9.47 1142.9 1.01 0.52 6.802 0.268 233 Aug 20 0.38 8.64 1151.5 1.00 0.38 5.477 0.216 234 Aug 21 0.38 10.03 1161.6 1.00 0.38 7.703 0.303 235 Aug 22 0.38 11.14 1172.7 0.99 0.38 7.761 0.306 236 Aug 23 0.44 9.75 1182.5 0.99 0.44 6.262 0.247 237 Aug 24 0.36 9.47 1191.9 0.98 0.35 7.531 0.297 238 Aug 25 0.35 8.64 1200.6 0.98 0.34 7.595 0.299 239 Aug 26 0.41 8.64 1209.2 0.97 0.40 5.647 0.222 240 Aug 27 0.26 7.27 1216.5 0.97 0.25 2.801 0.110 241 Aug 28 0.43 8.92 1225.4 0.96 0.41 6.415 0.253 242 Aug 29 0.34 8.36 1233.8 0.96 0.33 5.137 0.202 243 Aug 30 0.35 6.69 1240.4 0.95 0.33 4.415 0.174 244 Aug 31 0.22 4.50 1244.9 0.95 0.21 2.806 0.110 245 Sep 1 0.44 6.97 1251.9 0.94 0.41 6.297 0.248 246 Sep 2 0.38 7.25 1259.2 0.93 0.36 4.565 0.180 247 Sep 3 0.43 6.42 1265.6 0.93 0.40 5.508 0.217 248 Sep 4 0.48 8.64 1274.2 0.92 0.44 6.746 0.266 249 Sep 5 0.51 8.64 1282.9 0.91 0.46 6.840 0.269 250 Sep 6 0.51 9.19 1292.1 0.90 0.46 6.936 0.273 251 Sep 7 0.44 8.36 1300.4 0.89 0.39 6.196 0.244 252 Sep 8 0.45 8.36 1308.8 0.88 0.40 6.476 0.255 253 Sep 9 0.46 6.69 1315.5 0.87 0.40 6.557 0.258 254 Sep 10 0.21 0.03 1315.5 0.87 0.18 0.000 0.000 255 Sep 11 0.24 2.28 1317.8 0.87 0.21 0.000 0.000 256 Sep 12 0.28 6.42 1324.2 0.86 0.24 0.000 0.000 257 Sep 13 0.36 7.81 1332.0 0.85 0.30 0.000 0.000 258 Sep 14 0.34 6.97 1339.0 0.83 0.28 0.000 0.000 259 Sep 15 0.32 5.86 1344.8 0.82 0.26 0.000 0.000 260 Sep 16 0.32 5.58 1350.4 0.82 0.26 0.000 0.000 261 Sep 17 0.30 5.58 1356.0 0.81 0.24 0.000 0.000 262 Sep 18 0.31 6.42 1362.4 0.79 0.25 0.000 0.000 263 Sep 19 0.33 6.97 1369.4 0.78 0.26 0.000 0.000 264 Sep 20 0.35 7.81 1377.2 0.76 0.27 0.000 0.000 265 Sep 21 0.36 7.53 1384.7 0.75 0.27 0.000 0.000 266 Sep 22 0.35 7.53 1392.3 0.73 0.26 0.000 0.000 267 Sep 23 0.35 8.64 1400.9 0.71 0.25 0.000 0.000 268 Sep 24 0.37 8.36 1409.3 0.69 0.26 0.000 0.000 269 Sep 25 0.34 6.97 1416.2 0.67 0.23 0.000 0.000 270 Sep 26 0.31 6.42 1422.6 0.66 0.20 0.000 0.000 271 Sep 27 0.33 7.53 1430.2 0.64 0.21 0.000 0.000 272 Sep 28 0.31 7.25 1437.4 0.62 0.19 0.000 0.000 273 Sep 29 0.32 6.97 1444.4 0.60 0.19 1.524 0.060 274 Sep 30 0.30 6.69 1451.1 0.57 0.17 4.318 0.170 275 Oct 1 0.33 7.53 1458.6 0.55 0.18 4.572 0.180 276 Oct 2 0.33 6.69 1465.3 0.53 0.17 4.318 0.170 277 Oct 3 0.34 7.53 1472.8 0.50 0.17 4.318 0.170 278 Oct 4 0.35 5.86 1478.7 0.48 0.17 4.318 0.170 279 Oct 5 0.25 1.97 1480.7 0.47 0.12 3.048 0.120 280 Oct 6 0.27 3.64 1484.3 0.46 0.12 3.048 0.120 281 Oct 7 0.27 4.75 1489.1 0.44 0.12 3.048 0.120 282 Oct 8 0.30 6.42 1495.5 0.42 0.13 3.302 0.130 283 Oct 9 0.32 6.97 1502.4 0.39 0.12 3.048 0.120 284 Oct 10 0.37 6.69 1509.1 0.36 0.13 3.302 0.130 285 Oct 11 0.27 4.75 1513.9 0.34 0.09 2.286 0.090 286 Oct 12 0.33 6.14 1520.0 0.31 0.10 2.540 0.100 287 Oct 13 0.33 4.19 1524.2 0.30 0.10 2.540 0.100 288 Oct 14 0.16 0.00 1524.2 0.30 0.05 1.270 0.050 289 Oct 15 0.23 3.36 1527.6 0.28 0.06 1.524 0.060 290 Oct 16 0.25 3.64 1531.2 0.26 0.07 1.778 0.070 291 Oct 17 0.26 5.31 1536.5 0.24 0.06 1.524 0.060 292 Oct 18 0.29 5.31 1541.8 0.21 0.06 1.524 0.060 293 Oct 19 0.32 6.42 1548.2 0.18 0.06 1.524 0.060 294 Oct 20 0.29 6.14 1554.4 0.15 0.04 1.016 0.040 295 Oct 21 0.35 6.14 1560.5 0.12 0.04 1.016 0.040 296 Oct 22 0.26 1.42 1561.9 0.11 0.03 0.762 0.030 297 Oct 23 0.23 2.53 1564.5 0.09 0.02 0.508 0.020 298 Oct 24 0.26 5.03 1569.5 0.07 0.02 0.508 0.020 299 Oct 25 0.27 5.31 1574.8 0.04 0.01 0.254 0.010 300 Oct 26 0.32 6.42 1581.2 0.00 0.00 0.000 0.000 301 Oct 27 0.22 2.81 1584.0 0.00 0.00 0.000 0.000 302 Oct 28 0.24 4.75 1588.8 0.00 0.00 0.000 0.000 303 Oct 29 0.26 5.58 1594.4 0.00 0.00 0.000 0.000 304 Oct 30 0.28 6.42 1600.8 0.00 0.00 0.000 0.000 305 Oct 31 0.27 6.42 1607.2 0.00 0.00 0.000 0.000 306 Nov 1 0.27 5.86 1613.1 0.00 0.00 0.000 0.000 307 Nov 2 0.27 5.31 1618.4 0.00 0.00 0.000 0.000 308 Nov 3 0.28 5.31 1623.7 0.00 0.00 0.000 0.000 309 Nov 4 0.31 4.75 1628.4 0.00 0.00 0.000 0.000 310 Nov 5 0.28 2.81 1631.2 0.00 0.00 0.000 0.000 311 Nov 6 0.23 0.00 1631.2 0.00 0.00 0.000 0.000 312 Nov 7 0.18 0.03 1631.2 0.00 0.00 0.000 0.000 313 Nov 8 0.21 1.97 1633.2 0.00 0.00 0.000 0.000 314 Nov 9 0.28 1.97 1635.2 0.00 0.00 0.000 0.000 315 Nov 10 0.23 0.00 1635.2 0.00 0.00 0.000 0.000 316 Nov 11 0.20 0.58 1635.8 0.00 0.00 0.000 0.000 317 Nov 12 0.18 1.42 1637.2 0.00 0.00 0.000 0.000 318 Nov 13 0.26 4.19 1641.4 0.00 0.00 0.000 0.000 319 Nov 14 0.31 3.08 1644.5 0.00 0.00 0.000 0.000 320 Nov 15 0.17 0.00 1644.5 0.00 0.00 0.000 0.000 321 Nov 16 0.21 1.97 1646.4 0.00 0.00 0.000 0.000 322 Nov 17 0.23 3.08 1649.5 0.00 0.00 0.000 0.000 323 Nov 18 0.17 0.00 1649.5 0.00 0.00 0.000 0.000 324 Nov 19 0.24 3.92 1653.4 0.00 0.00 0.000 0.000 325 Nov 20 0.19 0.00 1653.4 0.00 0.00 0.000 0.000 326 Nov 21 0.17 0.00 1653.4 0.00 0.00 0.000 0.000 327 Nov 22 0.17 0.00 1653.4 0.00 0.00 0.000 0.000 328 Nov 23 0.23 0.00 1653.4 0.00 0.00 0.000 0.000 329 Nov 24 0.18 0.00 1653.4 0.00 0.00 0.000 0.000 330 Nov 25 0.16 0.00 1653.4 0.00 0.00 0.000 0.000 331 Nov 26 0.20 0.00 1653.4 0.00 0.00 0.000 0.000 332 Nov 27 0.16 0.00 1653.4 0.00 0.00 0.000 0.000 333 Nov 28 0.18 0.00 1653.4 0.00 0.00 0.000 0.000 334 Nov 29 0.18 0.00 1653.4 0.00 0.00 0.000 0.000 335 Nov 30 0.20 0.00 1653.4 0.00 0.00 0.000 0.000 336 Dec 1 0.19 0.00 1653.4 0.00 0.00 0.000 0.000 337 Dec 2 0.24 0.00 1653.4 0.00 0.00 0.000 0.000 338 Dec 3 0.17 0.00 1653.4 0.00 0.00 0.000 0.000