Country= Mali Station= Ansongo River= Niger Area= 566000 km2 Lat= 15.67 Lon= 0.5 Source= RivDIS PointID= 1508 Area Units= km2 Discharge Units= m3/sec Starting Year= 1957 Ending Year= 1987 Total Years= 31 Total Usable Years= 22 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1957 1911 1828 1444 608 172 54.1 103 605 1157 1426 1659 1847 1067.84 1958 2059 2144 1998 1604 649 -9999 -9999 937 1266 1505 1729 1897 -9999 1959 1985 1982 1823 -9999 -9999 -9999 -9999 559 1123 1416 1665 1859 -9999 1960 1983 1913 1481 687 170 50.6 120 -9999 -9999 -9999 -9999 -9999 -9999 1961 1958 1898 1554 815 -9999 -9999 -9999 161 976 1415 1586 1785 -9999 1962 1890 1783 1485 786 -9999 -9999 -9999 131 1091 1389 -9999 -9999 -9999 1963 2017 2026 1652 1102 -9999 -9999 -9999 -9999 933 1277 1466 1693 -9999 1964 1871 1872 1490 618 -9999 -9999 -9999 627 1134 1424 1693 1922 -9999 1965 2129 2129 1853 1039 -9999 -9999 -9999 761 1329 1570 1742 -9999 -9999 1966 2009 1987 1404 496 -9999 -9999 -9999 -9999 770 1255 1537 1777 -9999 1967 -9999 -9999 1229 545 -9999 -9999 -9999 -9999 -9999 1467 1734 1971 -9999 1968 2182 2132 1813 1042 -9999 -9999 -9999 708 1162 1402 1643 1834 -9999 1969 -9999 1685 975 -9999 -9999 -9999 -9999 645 1221 1537 1824 2019 -9999 1970 -9999 -9999 -9999 933 -9999 -9999 -9999 408 1078 1702 1927 -9999 -9999 1971 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1222 1531 1647 -9999 -9999 1972 -9999 -9999 1234 531 106 55 -9999 263 425 937 1573 -9999 -9999 1973 1515 914 -9999 -9999 -9999 78.2 147 308 888 1440 1483 1266 -9999 1974 -9999 369 -9999 -9999 -9999 -9999 -9999 -9999 1131 1478 1715 1882 -9999 1975 1811 1227 395 102 17.6 6.09 21.3 510 1158 1794 1772 1985 899.92 1976 1999 1531 664 189 46.5 12.7 31.9 410 951 1332 1540 1694 866.76 1977 1727 1398 1058 495 91.7 -9999 -9999 -9999 -9999 1125 1377 1483 -9999 1978 860 375 180 57.9 14.6 3.69 -9999 656 1069 1354 1595 1792 -9999 1979 -9999 1298 459 -9999 -9999 -9999 73.8 -9999 -9999 -9999 -9999 1890 -9999 1980 1966 331 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1981 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 1651 1844 -9999 1982 1950 1950 1865 1062 -9999 -9999 267 664 1087 1375 1617 1798 -9999 1983 1989 2099 2021 1604 858 225 77.8 485 1143 1492 1720 1903 1301.4 1984 2087 2108 1911 1316 505 77.5 184 875 1271 1519 1755 1935 1295.29 1985 2070 2075 1920 1321 540 214 336 841 1261 1522 1754 1984 1319.83 1986 2185 2259 2123 1688 910 326 328 884 1278 1560 1796 1994 1444.25 1987 2175 2203 1965 1448 633 212 135 452 936 1309 1569 1772 1234.08 Avg 1927.3 1673.69 1439.84 873.43 362.57 109.57 152.07 566.19 1082.4 1427.89 1658.11 1826.08 1178.67 Std Dev 271.64 574.26 538.11 467.44 316.79 101.82 102.45 226.87 190.48 163.33 118.35 164.98 196.68