Jabatan Pengairan dan Saliran Malaysia

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

Monthly means 1972 to 1999 site 4511468 SG. RAIA at KERAMAT PULAI, PERAK

Stage m

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

1972 ? ? 41.95 42.25 42.27 42.18 41.93 41.96 42.29 ? ? ? 42.12?

1973 42.23 41.93 ? ? ? ? ? ? ? ? 43.05 ? 42.41?

1974 42.69 ? ? 42.28 ? ? 42.27 42.11 ? ? ? ? 42.34?

1975 ? ? 42.19 ? ? ? ? ? ? ? ? ? 42.19?

1976 ? ? ? ? ? ? 42.20 ? 42.15 ? 42.69 ? 42.34?

1977 42.26 42.10 ? ? ? ? ? ? ? ? ? ? 42.18?

1978 ? ? ? ? ? ? ? ? ? ? ? ? ?

1979 ? ? ? ? ? ? ? ? 42.33 ? ? ? 42.33?

1980 ? ? ? ? ? ? ? ? ? ? ? ? ?

1981 ? ? ? ? ? ? ? 42.11 42.39 42.27 42.38 42.14 42.26?

1982 41.97 42.02 41.95 42.30 42.46 42.39 42.36 42.26 42.22 42.57 42.51 42.31 42.28

1983 42.03 41.89 41.95 41.84 41.97 42.03 42.07 42.07 42.29 42.08 42.04 42.04 42.03

1984 41.94 42.04 42.05 42.10 42.14 42.08 42.05 41.86 41.87 42.01 42.12 42.29 42.04

1985 42.04 41.95 42.01 41.90 ? 42.01 41.97 ? ? 42.49 42.72 42.41 42.17?

1986 42.06 41.92 41.87 42.11 42.12 42.10 41.93 41.78 41.89 42.17 42.19 42.07 42.02

1987 ? ? ? ? ? ? ? 42.01 41.99 42.34 42.40 42.29 42.20?

1988 42.12 42.15 42.00 41.95 42.07 42.04 42.08 42.20 42.44 42.23 42.45 ? 42.16?

1989 ? 42.16 42.23 42.42 42.27 42.20 42.23 42.12 42.33 42.50 42.49 42.31 42.30?

1990 42.13 42.02 41.97 42.03 42.35 41.99 ? ? ? 42.59 42.53 42.24 42.21?

1991 42.53 ? ? ? ? ? ? ? 42.55 42.79 42.90 42.66 42.68?

1992 42.64 42.61 ? ? ? 42.69 ? 42.70 42.64 42.68 42.84 42.77 42.70?

1993 42.73 42.65 42.63 42.86 43.02 42.70 42.55 42.45 42.68 42.93 42.97 43.13 42.78

1994 42.91 42.82 42.84 42.88 ? ? ? 42.92 42.77 ? ? 42.94 42.87?

1995 42.70 42.59 42.61 42.69 42.77 42.89 42.84 43.06 43.06 43.23 43.44 ? 42.90?

1996 ? ? ? ? 43.11 43.02 43.08 43.09 43.18 ? ? ? 43.10?

1997 ? ? 43.80 43.86 43.83 43.83 43.87 ? ? 43.97 ? ? 43.86?

1998 ? 43.86 43.80 43.77 43.87 43.72 43.90 44.12 44.09 44.09 44.40 ? 43.96?

1999 ? ? 44.47 ? ? ? ? 44.42 44.50 44.77 ? ? 44.54?

Min. 41.94 41.89 41.87 41.84 41.97 41.99 41.93 41.78 41.87 42.01 42.04 42.04 42.02

Mean 42.33 42.31 42.52 42.48 42.63 42.52 42.49 42.54 42.61 42.81 42.71 42.43 42.23

Max. 42.91 43.86 44.47 43.86 43.87 43.83 43.90 44.42 44.50 44.77 44.40 43.13 42.78

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.