Jabatan Pengairan dan Saliran Malaysia

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

Monthly means 1967 to 2000 site 3814416 SG. SLIM at SLIM RIVER, PERAK

Flow m3/s

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

1967 34.66 19.79 12.13 11.91 16.46 8.14 7.26 5.92 8.25 14.11 37.65 20.45 16.36

1968 8.82 7.26 ? ? 23.07 17.47 15.96 13.40 16.97 22.18 18.45 ? 16.00?

1969 ? 11.62 9.96 10.23 22.66 13.13 9.21 12.41 15.69 39.03 27.07 23.65 17.76?

1970 21.63 12.72 12.06 15.54 17.96 12.40 9.58 9.57 18.65 23.61 18.49 24.28 16.41

1971 46.35 14.67 12.94 ? ? 10.05 8.78 13.19 14.48 11.88 24.47 50.82 20.87?

1972 18.71 12.47 10.82 16.53 20.68 16.17 9.59 9.93 15.51 23.89 31.39 18.82 17.04

1973 12.42 9.67 9.44 17.81 19.76 21.15 12.59 16.49 20.21 30.53 42.89 ? 19.37?

1974 ? 13.04 10.01 18.24 18.28 12.27 11.22 9.55 17.91 11.91 18.01 14.24 14.04?

1975 18.34 11.40 13.50 17.05 ? 11.16 ? ? ? ? ? ? 14.35?

1976 ? ? ? ? ? ? ? ? ? ? ? ? ?

1977 ? ? 9.27 ? 14.94 17.39 18.58 10.79 9.20 39.03 23.33 15.22 17.54?

1978 10.33 8.69 6.08 11.34 15.62 7.02 6.08 5.63 6.02 11.47 21.86 11.42 10.13

1979 6.38 ? ? 11.21 10.88 12.28 13.90 7.61 14.72 12.31 34.52 ? 13.69?

1980 ? 6.83 8.95 8.69 13.52 9.15 8.09 ? ? 25.61 19.18 29.80 14.50?

1981 13.82 12.72 8.05 18.22 21.28 12.60 9.90 7.50 16.18 14.59 21.59 15.70 14.33

1982 9.17 8.74 9.52 20.99 23.50 16.90 12.25 ? ? ? ? 16.69 14.76?

1983 9.67 6.71 6.69 5.15 8.33 ? 7.30 12.18 21.56 ? ? 10.79 9.83?

1984 13.55 ? 21.46 20.59 19.42 16.49 14.65 10.60 11.74 20.22 27.73 34.85 19.21?

1985 17.26 17.33 ? 15.28 20.68 11.09 11.04 9.56 11.04 26.05 ? ? 15.49?

1986 ? ? 13.29 19.80 15.93 ? ? 10.61 13.82 ? ? ? 14.67?

1987 ? ? 9.07 11.01 13.81 13.44 12.63 21.76 22.89 ? ? 22.81 15.93?

1988 13.86 16.87 13.26 15.02 15.57 ? 20.64 20.83 52.46 31.50 ? ? 22.18?

1989 18.60 13.07 18.06 25.61 21.85 20.50 18.62 13.99 ? ? 36.33 19.21 20.59?

1990 15.06 11.66 12.12 ? ? 12.68 18.28 13.93 ? ? ? 18.85 14.71?

1991 ? ? ? ? 16.59 ? ? ? ? ? ? 14.38 15.48?

1992 ? ? 9.95 ? ? ? ? ? 6.29 14.46 24.50 ? 13.77?

1993 ? 9.78 11.02 ? ? 11.37 12.66 10.63 19.59 23.35 31.12 24.86 17.19?

1994 ? ? 18.95 ? ? ? 14.90 18.92 36.17 29.56 30.59 ? 24.76?

1995 ? ? ? ? ? 24.66 ? ? 25.31 33.49 ? ? 27.88?

1996 ? 17.74 15.68 32.73 28.95 ? ? 21.37 23.13 35.26 26.26 49.37 27.91?

1997 25.32 24.64 26.98 30.15 23.07 26.33 22.08 ? ? ? ? 23.22 25.21?

1998 17.32 13.32 11.22 7.92 8.41 10.59 13.25 ? 18.92 16.84 ? 21.48 13.95?

1999 25.03 23.52 27.81 35.64 ? 25.40 20.20 19.93 24.46 46.47 34.73 53.62 30.69?

2000 36.04 31.29 37.19 36.10 31.78 ? 21.29 25.37 24.97 29.01 35.87 ? 30.88?

Min. 6.38 6.71 6.08 5.15 8.33 7.02 6.08 5.63 6.02 11.47 18.01 10.79 10.13

Mean 18.68 13.98 13.77 18.03 18.52 14.79 13.35 13.27 18.70 24.43 27.91 24.30 14.85

Max. 46.35 31.29 37.19 36.10 31.78 26.33 22.08 25.37 52.46 46.47 42.89 53.62 17.04

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.