Compute Reference evapotranspiration (ETo)
ETo_cal.RdFunction to compute Reference evapotranspiration (ETo) estimates using different methods.
Arguments
- wth_data
A data frame containing weather data with columns: date, tmax, tmin, rain, rhum, srad, wspd (optional)
- lat
Numeric. Latitude (decimal degrees)
- elev
Numeric. Elevation (meters above sea level)
- ref_ht
Numeric. Sensors reference height.
- kRs
Numeric. Hargreaves empirical coefficient, Coastal coefficient
- ws_mean
Numeric. Wind Speed Mean, default = 2 m/s
Examples
# Compute ETo with provided weather data
ETo_cal(wth_data = weather, lat = 3.8, elev = 650)
#> Reference evapotranspiration (ETo) Method: FAO Penman-Monteith equation
#> [1] 4.085653 4.105157 4.891880 4.419465 4.991884 4.777290 4.929282 4.264894
#> [9] 5.026964 4.995741 4.503068 4.001525 3.979101 3.795897 4.068626 4.129398
#> [17] 4.376548 4.479655 5.036430 3.916891 4.033595 4.272329 4.677932 4.149542
#> [25] 3.676856 3.538113 3.788308 3.646341 4.159102 4.214471 3.715292 4.764055
#> [33] 3.640236 4.663920 4.332507 3.562260 3.598461 4.050814 2.900882 3.485745
#> [41] 3.473796 4.702026 4.397511 4.352767 4.029596 4.227044 3.836413 3.785922
#> [49] 3.949150 4.048771 4.048978 3.832787 4.013227 3.782618 2.852861 3.899796
#> [57] 3.924965 4.177930 4.432875 4.363969 4.369033 4.317314 4.226985 4.181671
#> [65] 4.497732 4.316860 4.225781 4.311430 4.301114 4.346494 4.183927 4.360440
#> [73] 3.930121 3.816085 3.911509 3.579146 3.933799 3.673341 3.708409 3.020308
#> [81] 3.306263 2.760046 4.214540 4.306789 4.104699 4.393479 3.828330 3.886309
#> [89] 4.183005 4.635592 4.574406 3.815165 4.036264 3.828532 3.745344 4.419597
#> [97] 4.148707 2.863690 4.423838 4.240521 4.367642 3.893065 4.557306 3.828913
#> [105] 3.528023 5.154988 4.415522 4.632654 3.596287 4.129201 5.027608 3.773187
#> [113] 3.429101 4.211138 4.497079 4.352519 4.500936 4.096190 3.672764 4.111681
#> [121] 3.631860 3.911780 3.314117 4.008345 2.828278 3.224052 1.951400 3.628066
#> [129] 2.973399 3.691887 3.688069 3.600336 3.171233 3.398032 3.224500 3.482649
#> [137] 2.739863 3.825517 2.748473 4.127199 2.991107 3.596553 3.193637 2.835695
#> [145] 3.732735 3.012772 3.613742 4.011068 3.545401 2.916456 3.406413 3.556255
#> [153] 4.000198 3.729021 4.322340 4.012317 3.796761 4.141449 4.292482 4.304985
#> [161] 3.936792 3.999127 3.728048 3.987679 4.318993 4.279354 4.092269 4.047496
#> [169] 4.151321 4.127043 4.234950 4.427060 4.217729 3.902292 3.487166 3.905567
#> [177] 4.072788 3.961890 3.630806 3.821233 2.961313 3.292206 3.846837 3.859496
#> [185] 3.569924 3.335004 4.249415 4.469670 4.112555 3.521583 3.014877 3.995009
#> [193] 3.769902 4.373067 4.365428 3.941704 3.730177 4.184642 3.729379 3.340697
#> [201] 3.833924 4.655762 4.607824 4.008951 4.546416 4.190935 3.767624 4.335137
#> [209] 4.222296 4.240803 3.656638 4.688746 4.597662 4.156649 4.456874 4.107321
#> [217] 4.713999 4.725660 3.665686 4.125572 4.304920 3.752945 3.288647 4.458869
#> [225] 3.718089 4.001033 4.189513 4.857950 3.753329 3.892003 4.853884 4.953552
#> [233] 4.360984 4.634409 4.099420 3.890543 3.963076 3.504119 4.813043 4.548688
#> [241] 3.907313 4.891341 5.108702 4.830165 4.590252 4.154784 4.044934 5.171739
#> [249] 4.757854 4.269017 5.270798 4.333857 4.739216 4.932582 4.207255 4.463769
#> [257] 3.987631 4.086558 4.866747 4.204821 4.496249 4.389880 4.734944 5.029472
#> [265] 4.947068 5.287016 4.904067 5.185185 4.771080 5.145757 4.687634 5.315796
#> [273] 4.218487 3.567779 4.509494 3.880633 3.920601 4.742690 4.549565 3.936389
#> [281] 4.381757 4.459274 3.852613 3.749884 3.712284 3.050476 3.227520 3.875039
#> [289] 2.545759 4.090853 4.407286 4.767472 3.858226 3.855128 3.152276 4.067507
#> [297] 3.892464 4.227884 4.361436 2.737108 3.953860 3.998102 3.590520 3.467562
#> [305] 3.597891 3.952193 3.469106 2.857525 2.921924 3.209967 3.009512 3.574010
#> [313] 3.218101 3.294014 3.741193 3.447027 3.184249 3.266636 3.880895 3.810769
#> [321] 3.719982 2.937870 3.454393 3.676233 3.630482 3.336538 2.668452 2.956697
#> [329] 2.452651 3.640151 3.601818 3.268878 3.052340 3.434963 4.065630 2.570657
#> [337] 2.781933 4.548460 3.739805 3.809226 2.494567 3.053303 2.682549 2.867260
#> [345] 3.681671 3.386343 2.877809 2.949144 2.969291 3.369594 2.807040 3.423144
#> [353] 3.527419 2.840585 3.094004 2.273784 4.739799 3.177837 3.855355 3.353409
#> [361] 3.605373 4.232547 4.278998 3.659226 3.717607 3.886894 3.939405 2.913064
#> [369] 3.598358 3.773424 3.195410 2.814941 3.396339 2.927305 3.343668 2.850537
#> [377] 3.586875 3.978342 4.406150 4.336316 3.606591 3.667489 2.690369 2.658519
#> [385] 3.758039 3.796500 3.892705 3.783308 3.914158 4.071770 3.261855 4.020207
#> [393] 3.533140 3.822712 3.696080 4.056943 4.512172 4.208017 3.755613 3.584665
#> [401] 3.403855 3.640943 4.030131 3.677782 4.014067 4.141874 4.290894 3.993029
#> [409] 3.330315 4.191207 4.246698 3.744530 4.172898 4.076919 3.681768 3.958263
#> [417] 5.164043 3.752419 3.942827 3.904264 3.144780 3.346018 3.140566 3.746248
#> [425] 3.032163 3.893050 3.672524 3.917652 4.070854 4.039064 4.165828 4.071942
#> [433] 4.086309 3.570058 3.723574 3.896727 2.853551 4.113127 3.164950 3.751581
#> [441] 4.355311 3.676073 3.808453 3.878532 4.389089 3.983629 4.263376 4.327651
#> [449] 3.666810 4.253456 4.297143 4.629662 4.682636 4.139066 4.331065 4.208071
#> [457] 4.566003 3.403899 4.759719 4.766336 4.633176 4.502793 3.924712 4.269552
#> [465] 4.430175 4.931763 4.248303 4.863987 4.473017 3.410151 4.398827 4.141492
#> [473] 4.397949 3.753847 3.894636 3.309442 2.678952 4.080890 2.872133 4.377641
#> [481] 2.998323 3.416944 4.101241 3.784702 3.668206 3.530272 3.249630 3.839078
#> [489] 3.563719 4.007535 2.942245 2.850735 3.667244 2.904076 3.199008 3.152216
#> [497] 3.617920 3.543665 3.475423 3.246776 3.697669 3.130562 2.896803 2.888104
#> [505] 4.172972 3.470746 3.430193 3.920949 3.623491 3.475443 3.543098 3.358870
#> [513] 3.535251 3.379444 3.429084 3.440790 3.220443 3.367536 3.793763 3.749687
#> [521] 3.796157 3.454847 3.455961 3.475241 3.559563 3.561887 4.232645 4.448672
#> [529] 4.107620 3.979348 4.116351 4.145927 3.610517 3.313542 3.675928 3.851317
#> [537] 4.270034 3.825055 4.158026 3.347371 3.761705 3.383864 3.715904 3.859716
#> [545] 4.153376 3.430003 3.904488 3.915508 3.996116 3.682540 4.297509 4.031009
#> [553] 3.973117 3.584550 4.541225 4.332040 2.943304 4.502222 4.234939 4.397159
#> [561] 3.548474 4.418565 3.823541 4.333818 4.158945 3.690479 4.405325 4.454299
#> [569] 4.270208 4.738998 4.761081 4.701586 3.914087 4.714876 4.390197 3.970769
#> [577] 4.501820 4.853429 3.561619 4.346832 4.694245 3.134319 4.197672 3.630063
#> [585] 4.037010 3.377992 4.106726 4.005793 3.816015 3.801541 4.550825 4.594517
#> [593] 3.861820 3.767991 3.692957 4.185201 4.643244 4.759019 4.811982 4.023846
#> [601] 4.347725 3.240579 3.769969 3.790741 3.607177 4.407093 5.233410 5.140765
#> [609] 5.080262 3.753585 4.734042 4.654042 4.831839 4.718451 4.305866 4.166956
#> [617] 4.783428 4.666901 4.080062 3.910787 3.311291 3.920824 3.800208 4.137380
#> [625] 4.511146 3.649277 4.234181 3.774172 3.574950 3.919951 4.157731 3.907526
#> [633] 4.236027 4.380397 4.274464 5.224060 5.215612 5.215621 4.543185 4.770570
#> [641] 4.113296 4.986758 4.237968 4.172850 4.342163 4.146713 4.298419 3.906794
#> [649] 4.738736 3.817760 3.819423 4.785857 4.321120 4.358212 4.547960 4.058261
#> [657] 4.591099 4.267113 3.863483 2.970638 3.990316 3.686976 3.288101 2.916951
#> [665] 3.476988 3.882541 4.008329 4.082183 3.707197 3.472999 3.327421 3.671944
#> [673] 3.647336 2.946159 3.664188 3.507542 3.051908 3.541843 3.239085 3.212498
#> [681] 3.383821 2.857992 3.595261 2.321946 3.710249 3.633233 3.332084 3.864802
#> [689] 3.756939 3.834909 3.665521 3.871984 2.549381 2.507080 3.319571 3.891197
#> [697] 3.903584 3.318692 3.680446 3.941556 4.473952 3.296175 3.139405 3.601200
#> [705] 2.920553 3.146304 3.688998 3.825094 3.550778 2.704804 3.219739 3.095181
#> [713] 3.592103 3.375914 3.285346 3.396689 3.653461 3.557709 3.724771 3.933217
#> [721] 4.481908 4.091245 3.323593 3.256307 3.528786 3.767451 3.822108 3.432320
#> [729] 3.926549 3.907526 4.453486 4.699113 4.755511 4.324294 4.521704 3.189409
#> [737] 4.391711 3.857037 4.166604 4.392970 4.141482 4.856365 4.296297 4.464613
#> [745] 3.965942 3.946929 4.625330 2.791332 4.565980 4.764414 5.090790 5.104705
#> [753] 3.165823 3.206686 3.593781 3.864423 3.185172 3.634192 3.722874 3.796001
#> [761] 3.013902 3.433997 4.453478 3.811103 4.118860 4.369203 3.238038 3.742169
#> [769] 3.345839 3.481465 3.578104 3.424556 2.769250 3.617018 2.922562 4.040001
#> [777] 4.402125 4.399959 4.214903 3.821816 4.364985 4.622269 4.995455 4.421102
#> [785] 4.412138 5.021419 4.378484 4.460426 3.795068 4.110150 3.667475 4.329490
#> [793] 3.333909 4.210430 4.177413 3.809638 4.494562 4.715678 4.142503 4.874008
#> [801] 4.963248 4.413276 4.304221 4.379228 4.074129 3.761296 5.206211 3.325294
#> [809] 3.936023 3.730285 4.233793 4.087025 3.965234 4.280914 3.458945 4.184366
#> [817] 3.788267 4.907368 4.173053 4.202192 2.666431 3.760680 3.315826 3.970872
#> [825] 3.666889 4.127605 4.413489 3.424689 3.946873 4.556993 2.836849 4.092529
#> [833] 4.051567 4.110490 4.086532 3.689336 2.890986 3.921520 3.916702 4.031168
#> [841] 3.365826 3.824544 4.098157 4.563142 2.656216 3.987453 4.646500 3.642648
#> [849] 4.705415 4.086260 2.687955 4.278946 4.164111 4.013233 4.253426 4.449604
#> [857] 5.041573 3.044197 4.134900 3.961802 4.221092 4.192406 3.809562 3.064033
#> [865] 3.973615 3.952054 3.358189 3.845951 4.219376 3.820486 3.501383 3.090694
#> [873] 3.476522 4.308554 2.830364 3.761652 3.553514 3.810153 3.833142 3.401802
#> [881] 3.640285 3.116334 4.223901 3.702162 3.739921 3.555243 4.222344 3.293043
#> [889] 3.359816 2.675598 3.027437 2.873513 3.613682 3.181300 3.811716 3.416808
#> [897] 4.296736 4.130223 4.070930 4.342737 4.516896 4.502486 4.539709 4.147234
#> [905] 4.396573 4.084999 3.992687 4.198302 4.188666 3.728180 4.113190 4.339394
#> [913] 4.134303 4.098221 4.684433 4.208523 4.737308 4.525015 4.919526 4.596402
#> [921] 4.770681 4.751440 3.793363 3.815549 3.681593 3.933315 3.079145 3.074901
#> [929] 4.153660 3.667730 3.813226 4.681813 3.999116 3.852209 4.098578 3.972706
#> [937] 4.587657 4.570926 4.286832 4.684846 4.719572 4.501201 4.521358 4.272514
#> [945] 4.559494 4.727809 3.329325 4.189372 3.708774 3.947544 4.564848 4.509383
#> [953] 3.995960 4.938411 4.742342 4.557779 3.919385 4.002627 5.042422 5.193959
#> [961] 4.922173 4.693043 4.587467 4.844156 5.077714 4.883270 4.498173 4.172658
#> [969] 3.714580 5.308515 4.674469 4.373534 4.631095 4.901939 4.941157 5.022852
#> [977] 5.322130 4.987937 4.371640 5.246885 5.159955 4.858525 4.580406 4.980113
#> [985] 5.057675 5.726685 5.345347 5.066025 5.453172 4.339572 4.656851 4.826508
#> [993] 4.329473 5.309728 5.051955 5.003972 5.176480 4.511934 5.366414 5.008779
#> [1001] 5.556019 5.043497 5.154548 4.799955 4.180111 3.636873 4.307934 4.777716
#> [1009] 4.781796 4.984286 4.209715 4.039455 4.341445 3.697394 3.881922 4.272235
#> [1017] 3.898574 3.482399 3.600879 4.080781 3.560634 4.705879 5.139880 4.575404
#> [1025] 4.393716 3.543468 4.132011 3.907752 3.952993 3.829784 4.149588 4.095585
#> [1033] 4.308120 4.246271 4.416472 2.977291 3.686815 3.798815 3.170862 3.982557
#> [1041] 3.598240 4.187208 3.734437 4.257075 3.650475 4.106187 3.824662 4.611723
#> [1049] 4.047038 4.416473 3.302728 3.410467 3.631927 3.982771 3.799601 3.884971
#> [1057] 2.770176 3.834304 3.852121 3.712552 3.554536 3.630655 3.180440 3.411099
#> [1065] 4.231297 4.562077 3.216272 3.512010 4.099384 3.941849 4.387533 4.235906
#> [1073] 4.264983 4.288656 4.494104 4.780924 4.342294 3.987485 4.660501 3.597937
#> [1081] 3.780932 3.241238 3.605030 4.360837 4.830154 4.839681 4.823865 4.829357
#> [1089] 4.864890 5.023848 4.957452 4.504687 5.000344 4.661198 4.699739 4.918159
#> [1097] 3.943705 4.796852 3.979702 4.545977 3.392780 4.244900 3.581611 4.474048
#> [1105] 4.060760 3.667835 4.026670 4.107091 4.107343 4.578027 4.466259 4.117511
#> [1113] 4.457669 4.437944 4.409188 4.535082 4.395973 4.644473 4.383499 4.096201
#> [1121] 4.344802 4.803768 4.707608 4.491929 4.533675 4.506470 4.774171 4.953285
#> [1129] 4.728937 4.314947 4.557273 4.394251 4.770756 4.343337 4.614518 4.238571
#> [1137] 4.983902 4.147031 4.878421 4.927579 4.783406 4.991939 5.143755 3.789856
#> [1145] 4.752964 4.565935 4.878716 5.313578 4.670321 4.393612 3.760122 4.265197
#> [1153] 4.795012 4.427111 4.563882 4.201750 4.660249 4.073645 3.418280 4.210275
#> [1161] 3.700865 4.006232 3.885248 4.103878 4.699123 3.921813 4.234465 4.670772
#> [1169] 3.755493 3.830584 4.786018 4.375850 4.175567 4.405861 4.838974 4.241095
#> [1177] 4.292307 3.771787 5.209177 5.083120 5.216834 5.108197 4.668407 4.144490
#> [1185] 4.343332 4.474685 4.124753 4.446403 3.939527 4.719129 4.214500 3.862104
#> [1193] 4.300193 4.195378 3.221308 3.763107 4.493284 4.643951 3.225071 4.242399
#> [1201] 4.464490 4.329425 3.292054 3.965232 4.464641 3.912621 4.885966 4.423127
#> [1209] 4.075981 3.632231 4.062539 4.268501 3.449172 2.921014 4.078664 3.639615
#> [1217] 3.448947 4.001425 4.062633 3.707286 4.205953 4.352646 4.013425 3.887506
#> [1225] 3.439965 2.778087 3.774304 3.731324 3.403341 4.285733 4.450820 4.265340
#> [1233] 4.124828 3.722227 3.709287 4.015838 4.342330 4.594835 4.401410 3.940027
#> [1241] 4.595940 2.930871 4.231525 2.873321 3.604465 4.422027 4.364726 3.175068
#> [1249] 3.219101 3.428726 4.033366 4.218724 3.083053 3.353102 3.629394 3.715467
#> [1257] 3.117622 4.360012 4.138848 3.922445 4.027793 4.027374 4.097170 3.998926
#> [1265] 3.813132 3.838819 3.944883 4.180099 4.257783 3.618383 4.080290 4.115967
#> [1273] 3.584347 4.441195 4.157384 4.099832 4.304141 3.809045 3.899820 3.482686
#> [1281] 3.716233 3.628770 3.014426 4.370312 4.227952 4.829281 4.002485 4.468816
#> [1289] 4.256592 3.985851 4.088060 3.595876 3.501987 4.200989 3.323933 4.322196
#> [1297] 3.781593 4.131733 3.624390 4.677084 3.789971 4.085781 4.974547 4.078990
#> [1305] 4.519058 4.323111 4.822887 4.422451 4.436686 4.029011 4.424690 4.378316
#> [1313] 4.601808 5.156605 4.952173 4.054299 4.752599 5.014192 4.562756 4.881457
#> [1321] 4.208430 4.871980 4.453283 4.890301 3.754880 4.133386 5.145255 5.269089
#> [1329] 4.712812 4.441570 5.401502 4.716799 4.943013 4.222085 4.119555 4.457782
#> [1337] 4.907531 4.869252 3.968653 3.935901 4.032920 4.575759 4.672224 4.722994
#> [1345] 4.190448 4.966501 4.791403 5.037574 4.712206 4.428281 4.612528 4.147594
#> [1353] 4.070791 4.093340 4.612308 5.221029 4.165592 4.119808 5.238707 4.353522
#> [1361] 4.989277 3.709551 3.809866 4.263019 4.763084 5.117400 3.412823 4.676987
#> [1369] 4.743110 4.706080 3.542106 3.961345 4.502737 3.642314 4.392163 3.884284
#> [1377] 3.980330 3.703799 3.198853 3.555346 2.601811 4.159722 3.741092 4.042949
#> [1385] 4.418842 4.148955 3.210113 4.382283 3.034177 4.159375 4.027477 3.573575
#> [1393] 4.057362 2.812741 3.645110 3.641764 4.109758 3.006579 4.129542 4.165621
#> [1401] 3.719854 4.004155 3.939011 2.884892 4.279700 4.193792 3.679921 3.858641
#> [1409] 3.426532 3.508440 4.036029 3.757035 3.869967 3.887438 3.608471 3.821355
#> [1417] 3.555045 3.704740 4.206090 3.090438 3.626281 3.645736 3.123541 2.627826
#> [1425] 3.029276 3.595844 3.527412 3.301437 2.020400 3.921387 3.554699 3.645136
#> [1433] 4.972624 3.696622 2.856538 3.940903 3.035503 3.693356 3.411679 3.423512
#> [1441] 3.521424 3.340420 3.481975 3.623086 3.512712 3.434507 3.541413 3.803278
#> [1449] 3.508111 2.700202 2.382120 3.497974 3.286916 3.765798 3.279708 3.661056
#> [1457] 3.718609 3.808057 4.013079 3.132051 2.716492