Jabatan Pengairan dan Saliran Malaysia

Source is M:\Datanegeri\Perak\Wlevel.mtd

Monthly means 1960 to 2000 site 4809443 PERAK at JAM.ISKANDAR, PERAK

Flow m3/s

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Mean

1960 ? ? ? ? ? ? ? 62.0 84.7 93.5 211.5 224.4 135.1?

1961 252.4 114.5 104.4 144.1 147.6 93.2 102.4 88.1 124.5 166.7 205.3 165.3 142.6

1962 184.9 83.7 106.5 104.9 190.1 99.2 100.3 116.0 123.7 231.5 190.3 246.2 148.8

1963 165.0 78.0 89.8 85.7 91.6 112.6 98.8 108.2 92.0 289.4 379.2 260.8 154.7

1964 98.1 90.8 88.2 88.4 130.8 115.6 238.6 149.7 225.5 173.7 328.1 190.2 159.9

1965 99.6 95.4 92.6 120.9 185.4 83.8 110.0 147.2 208.2 493.6 579.2 602.4 235.9

1966 399.5 220.2 192.4 189.2 240.8 211.5 145.7 183.1 217.7 712.7 601.8 627.2 329.6

1967 1368.7 422.3 350.6 278.8 378.6 208.0 171.3 147.0 168.2 262.3 591.1 475.3 402.7

1968 175.7 100.4 81.2 100.6 140.3 152.5 130.4 98.0 96.8 194.6 130.4 161.2 130.5

1969 192.5 90.5 82.6 92.2 209.7 153.1 102.3 165.5 118.1 380.9 384.8 578.5 213.8

1970 403.6 170.5 107.4 133.8 165.6 132.4 129.4 135.0 192.7 341.2 ? 462.9 216.8?

1971 ? ? ? ? ? 107.4 90.6 126.1 178.2 160.9 169.7 ? 138.6?

1972 228.4 ? 97.1 154.1 130.2 78.6 60.4 ? ? ? ? 226.2 139.5?

1973 ? ? ? ? 150.8 ? ? ? 99.5 ? 794.5 ? 346.1?

1974 266.7 172.2 119.6 145.0 212.3 ? ? 130.2 98.3 136.0 214.7 171.7 166.8?

1975 ? ? 145.9 136.3 150.8 126.7 171.1 ? ? 112.7 246.7 ? 155.6?

1976 235.3 125.9 121.1 163.7 190.4 156.1 126.0 114.4 147.7 218.4 239.7 169.8 167.5

1977 74.4 54.4 44.9 47.0 58.2 56.2 48.4 49.5 56.0 228.6 152.8 89.7 80.3

1978 84.1 52.2 44.6 68.5 84.3 38.6 31.4 58.7 80.6 109.8 125.4 77.0 71.4

1979 79.7 87.0 56.6 60.5 76.6 111.2 ? ? 185.9 151.4 234.7 144.0 118.7?

1980 108.2 104.0 136.0 ? ? ? ? ? ? ? ? ? 116.3?

1981 ? 166.4 139.7 171.5 233.6 207.0 168.8 209.1 203.7 183.2 202.8 180.8 188.0?

1982 127.6 134.2 180.8 205.2 170.1 132.0 122.1 115.6 149.2 191.7 233.2 168.0 160.8

1983 ? 210.7 170.4 118.4 138.3 ? 121.8 126.6 281.8 160.9 201.0 205.5 172.9?

1984 151.6 256.0 242.6 238.9 301.2 299.1 260.3 230.2 276.8 320.1 395.5 481.3 287.8

1985 531.3 378.8 271.3 172.6 185.2 178.6 158.9 126.3 119.3 ? 362.1 283.0 251.0?

1986 257.9 233.3 198.7 188.5 172.5 174.6 136.8 ? ? 249.1 281.6 257.9 214.9?

1987 196.9 156.8 153.9 163.2 209.4 223.5 ? 240.5 259.9 401.8 391.4 501.0 264.5?

1988 ? ? ? ? ? ? ? ? ? ? ? ? ?

1989 297.1 ? ? 212.8 236.0 224.8 215.1 177.5 217.9 254.2 280.4 184.0 229.9?

1990 166.4 156.7 152.9 148.1 202.8 ? ? 128.3 120.3 338.0 331.7 203.1 195.1?

1991 278.7 280.2 284.0 269.6 330.6 328.5 276.0 282.6 283.7 317.5 308.3 289.2 294.1

1992 262.4 260.7 266.2 271.2 279.5 288.6 302.2 283.3 ? 274.6 310.4 275.4 279.5?

1993 274.5 274.9 ? ? ? 299.5 282.3 253.7 281.2 347.1 354.1 ? 296.0?

1994 ? ? ? ? ? 381.0 364.1 296.7 272.1 310.5 323.2 ? 324.6?

1995 ? 258.1 248.2 268.1 259.7 252.5 ? 208.4 203.0 ? ? ? 242.4?

1996 257.7 242.0 237.4 257.6 274.3 270.3 268.5 246.5 256.0 321.8 354.0 367.9 279.7

1997 260.9 262.6 251.1 251.6 249.8 230.3 219.0 221.4 236.4 291.2 ? 249.8 247.6?

1998 230.9 216.4 211.7 212.0 204.1 199.4 212.5 239.2 ? ? 406.1 353.8 248.7?

1999 286.2 296.8 264.0 294.8 331.3 292.7 300.2 298.4 340.6 456.8 354.0 384.8 325.3

2000 258.5 243.6 257.2 350.6 325.8 287.3 247.6 226.7 248.9 299.6 283.8 ? 275.4?

Min. 74.4 52.2 44.6 47.0 58.2 38.6 31.4 49.5 56.0 93.5 125.4 77.0 71.4

Mean 258.0 184.5 164.4 173.8 201.1 185.5 172.3 170.3 183.8 269.9 318.7 289.3 210.9

Max. 1368.7 422.3 350.6 350.6 378.6 381.0 364.1 298.4 340.6 712.7 794.5 627.2 402.7

Remarks:

1. The Min Mean and Max of Annual means are for complete years only.

2. ‘?’ means incomplete data for the month.

3. ‘xxxx?’ means total amount with incomplete data.