Results
| Country: | Guyana
| | Station: | PlantainIsland | | River: | Essequibo | | Area: | 66600 km2 | | Lat: | 5.85 | | Lon: | -58.58 | | Source: | RivDIS | | PointID: | 509 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1965 | | Ending Year: | 1979 | | Total Years: | 15 | | Total Usable Years: | 12 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1965 | 850 | 610 | 560 | 320 | 2790 | 4250 | 3250 | 2300 | 1140 | 430 | 410 | 320 | 1435.83 |
| 1966 | 350 | 190 | 290 | 430 | 810 | 3100 | 4030 | 4400 | 3050 | 1080 | 590 | 900 | 1601.67 |
| 1967 | 1630 | 1040 | 630 | 1070 | 3400 | 6350 | 7500 | 5700 | 2120 | 870 | 590 | 980 | 2656.67 |
| 1968 | 1350 | 1000 | 680 | 2000 | 2850 | 4950 | 6700 | 4550 | 2050 | 1200 | 860 | 1490 | 2473.33 |
| 1969 | 1920 | 1550 | 666 | 1370 | 3860 | 4480 | 3610 | 3230 | 1920 | 812 | 411 | 323 | 2012.67 |
| 1970 | 903 | 952 | 616 | 2060 | 3150 | 4370 | 4570 | 4860 | 3800 | 1170 | 1180 | 1000 | 2385.92 |
| 1971 | 1720 | 1350 | 1420 | 1440 | 3930 | 5490 | 7630 | 5260 | 3500 | 1600 | 1280 | 1180 | 2983.33 |
| 1972 | 1670 | 1400 | 1830 | 2440 | 4770 | 5360 | 4060 | 2280 | 1390 | 593 | 1060 | 907 | 2313.33 |
| 1973 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1974 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1975 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1976 | 1980 | 1950 | 2620 | 3280 | 5420 | 5650 | 6240 | 3950 | 1520 | 659 | 383 | 780 | 2869.33 |
| 1977 | 653 | 416 | 582 | 549 | 1610 | 3950 | 5110 | 4300 | 1480 | 905 | 464 | 688 | 1725.58 |
| 1978 | 565 | 628 | 290 | 811 | 2180 | 4320 | 4400 | 3640 | 2040 | 778 | 589 | 839 | 1756.67 |
| 1979 | 801 | 416 | 923 | 1660 | 2820 | 5550 | 5910 | 4340 | 2450 | 1370 | 829 | 1060 | 2344.08 |
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| Avg | 1199.33 | 958.5 | 925.58 | 1452.5 | 3132.5 | 4818.33 | 5250.83 | 4067.5 | 2205 | 955.58 | 720.5 | 872.25 | 2213.2 |
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| Std Dev | 549.27 |
508.22 |
664.83 |
853.23 |
1226.96 |
862.57 |
1444.64 |
1016.7 |
812.82 |
324.8 |
301.93 |
315.13 |
483.87 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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