Results
| Country: | Brasil
| | Station: | Jatoba | | River: | Tapajos | | Area: | 387378 km2 | | Lat: | -5.15 | | Lon: | -56.83 | | Source: | ANEEL | | PointID: | 39 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1973 | | Ending Year: | 1994 | | Total Years: | 22 | | Total Usable Years: | 20 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1973 | 9135 | 12933 | 16796 | 18783 | 15167 | 8391 | 5736 | 4427 | 3901 | 4370 | 6263 | 9663 | 9630.42 |
| 1974 | 11367 | 16465 | 19898 | 22931 | 18485 | 9858 | 5813 | 4354 | 4169 | 4405 | 5173 | 8903 | 10985.1 |
| 1975 | 12668 | 18389 | 19144 | 20052 | 15961 | 8564 | 5998 | 4346 | 3824 | 3985 | 5115 | 7188 | 10436.2 |
| 1976 | 9707 | 14911 | 18305 | 17279 | 13030 | 8184 | 5216 | 3978 | 3649 | 4438 | 5782 | 8424 | 9408.58 |
| 1977 | 13527 | 16008 | 17780 | 16896 | 14105 | 10419 | 6162 | 4308 | 3962 | 5350 | 6666 | 9830 | 10417.8 |
| 1978 | 21561 | 18064 | 25391 | 21647 | 16585 | 10648 | 6622 | 5034 | 4428 | 5099 | 6355 | 9765 | 12599.9 |
| 1979 | 15577 | 23509 | 25278 | 21738 | 13599 | 8207 | 5634 | 4514 | 4826 | 4711 | 6032 | 6549 | 11681.2 |
| 1980 | 12257 | 20041 | 26334 | 19033 | 10742 | 6867 | 5224 | 4233 | 4085 | 4711 | 5514 | 7818 | 10571.6 |
| 1981 | 14285 | 17463 | 16721 | 18167 | 11671 | 6674 | 4788 | 4037 | 3716 | 4057 | 6312 | 8980 | 9739.25 |
| 1982 | 14928 | 21768 | 22831 | 20431 | 15216 | 8501 | 5717 | 4525 | 4559 | 5008 | 5162 | 6120 | 11230.5 |
| 1983 | 17231 | 21977 | 19911 | 16801 | 9891 | 7120 | 5196 | 4239 | 3925 | 4433 | 6877 | 9750 | 10612.6 |
| 1984 | 10565 | 12066 | 16039 | 19586 | 15721 | 8754 | 5380 | 4416 | 4288 | 4519 | 5920 | 8117 | 9614.25 |
| 1985 | 14799 | 21489 | 21426 | 21782 | 17946 | 9033 | 5943 | 4579 | 4249 | 4867 | 6269 | 9149 | 11794.2 |
| 1986 | 19777 | 20937 | 20664 | 19521 | 14997 | 8671 | 6208 | 4850 | 4729 | 5727 | 6984 | 8217 | 11773.5 |
| 1987 | 12612 | 16224 | 18390 | 16951 | 11497 | 7191 | 4958 | 3818 | 3661 | 3939 | 4950 | 8497 | 9390.67 |
| 1988 | 13613 | 16253 | 22620 | 21517 | 16098 | 9818 | 5967 | 4130 | 3882 | 4632 | 6047 | 10840 | 11284.8 |
| 1989 | 16285 | 21485 | 23210 | 22261 | 18745 | 10336 | 7326 | 5675 | 4856 | 4990 | 7064 | 13405 | 12969.8 |
| 1990 | 17766 | 17964 | 21179 | 16206 | 10691 | 6652 | 5415 | 4150 | 4370 | 5493 | 6383 | 8750 | 10418.2 |
| 1991 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1992 | 10134 | 16371 | 19270 | 19861 | 13734 | -9999 | -9999 | -9999 | 5107 | 5052 | 5289 | 9447 | -9999 |
| 1993 | 11502 | 14614 | 20417 | 16620 | 11662 | 6662 | 4847 | 4258 | 4208 | 4451 | 5380 | 7553 | 9347.83 |
| 1994 | 16813 | 18575 | 21624 | 20747 | 13741 | 8811 | 6509 | 4674 | 4341 | 4732 | 5450 | 9564 | 11298.4 |
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| Avg | 14100.4 | 17976.5 | 20629.9 | 19467.1 | 14251.6 | 8468.05 | 5732.95 | 4427.25 | 4225.48 | 4712.81 | 5951.76 | 8882.33 | 10760.2 |
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| Std Dev | 3246.12 |
3049.71 |
2836.42 |
2050.32 |
2539.7 |
1271.15 |
626.28 |
401.46 |
405.77 |
464.6 |
637.46 |
1518.79 |
1043.4 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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