Country= Sri_Lanka Station= Peradeniya River= MahaweliGanga Area= 1189 km2 Lat= 7.28 Lon= 80.62 Source= RivDIS PointID= 855 Area Units= km2 Discharge Units= m3/sec Starting Year= 1949 Ending Year= 1984 Total Years= 36 Total Usable Years= 35 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1949 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 65 60 56 -9999 1950 21 12 19 10 41 71 101 99 144 59 50 11 53.17 1951 57 18 5 48 26 238 102 30 56 93 112 38 68.58 1952 47 18 13 38 184 125 90 105 39 154 54 25 74.33 1953 16 7 10 26 12 16 90 54 51 74 57 51 38.67 1954 34 19 28 50 71 59 61 119 69 142 52 83 65.58 1955 31 25 26 32 134 276 109 67 78 54 38 75 78.75 1956 14 6 10 8 29 156 76 101 92 122 157 57 69 1957 25 30 16 22 40 162 162 69 49 52 124 270 85.08 1958 46 30 34 44 70 74 118 128 44 144 118 48 74.83 1959 20 14 7 35 42 192 186 69 75 102 81 47 72.5 1960 36 55 28 62 63 91 110 103 146 127 150 53 85.33 1961 26 21 15 18 89 72 78 141 67 65 69 51 59.33 1962 35 22 18 32 98 59 104 76 123 116 73 42 66.5 1963 38 24 18 37 36 60 88 74 70 120 86 98 62.42 1964 46 33 27 24 40 50 105 108 115 67 145 40 66.67 1965 13 13 8 47 164 111 38 91 59 105 81 67 66.42 1966 31 16 19 40 23 27 43 45 125 126 100 46 53.42 1967 26 24 22 17 17 58 71 59 33 141 101 104 56.08 1968 21 8 15 22 56 95 191 131 121 99 83 45 73.92 1969 22 13 9 42 87 129 59 35 82 83 53 58 56 1970 47 37 20 45 41 74 75 127 57 96 93 100 67.67 1971 45 21 18 51 63 92 118 116 213 112 55 72 81.33 1972 17 7 2 22 113 26 120 84 57 141 118 77 65.33 1973 20 8 3 10 6 28 41 101 32 24 59 64 33 1974 27 16 17 54 78 132 197 174 152 115 48 48 88.17 1975 33 19 18 31 46 174 67 156 128 142 228 73 92.92 1976 41 17 12 38 15 12 55 50 40 81 89 58 42.33 1977 19 11 12 28 85 113 91 61 40 132 96 48 61.33 1978 20 15 17 10 137 71 148 180 85 107 264 95 95.75 1979 47 35 28 35 62 91 125 87 136 154 167 113 90 1980 28 14 11 30 27 36 79 81 46 78 71 46 45.58 1981 32 13 10 19 16 114 78 68 179 58 97 97 65.08 1982 17 9 10 22 54 186 103 75 28 55 83 78 60 1983 32 11 4 1 13 18 39 70 51 36 92 93 38.33 1984 65 54 51 74 41 95 193 60 74 -9999 -9999 -9999 -9999 Avg 31.29 19.86 16.57 32.11 60.54 96.66 100.31 91.26 84.46 98.31 97.26 69.34 66.28 Std Dev 12.62 11.7 9.73 16.04 43.24 62.3 43.52 36.43 45.53 35.36 48.92 41.6 15.62