Country= South_Africa Station= Engelbrechtsdrift River= Vaal Area= 38564 km2 Lat= -26.82 Lon= 28.06 Source= RivDIS PointID= 1518 Area Units= km2 Discharge Units= m3/sec Starting Year= 1964 Ending Year= 1986 Total Years= 23 Total Usable Years= 21 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg Annual 1964 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 33.4 40.8 148 -9999 1965 146 86.1 47.8 29.3 38.8 31.8 36.9 37.8 54.7 52.5 51.5 46.7 54.99 1966 36.3 5.27 33.2 23.7 24.8 22 29.9 29.2 28.6 17.6 14.7 10.4 22.97 1967 3.26 363 91.8 91.5 23.8 7.65 11.5 16.4 28 41.4 25.1 29.8 61.1 1968 41.7 56.2 9.14 8.26 9.35 12.1 28.6 35.7 39.9 40.7 26 17.4 27.09 1969 46.5 42.6 10.5 6.14 8.58 7.69 7.6 26.5 29.9 31.7 10.8 8.68 19.77 1970 30.6 23.6 34.1 30.6 16.2 17 15.8 28.9 41.7 29.6 15.3 26.5 25.83 1971 7.09 8.99 8.99 7.45 7.9 9.44 8 11.7 12.6 15.3 9.47 7.25 9.51 1972 9.31 19.3 110 20.1 7.33 8.1 10.4 10.6 16.6 17.2 12.8 16.7 21.54 1973 18.3 14.5 17.4 7.59 10.8 12.5 11.8 13.3 19.4 30.3 18 5.99 14.99 1974 97.7 245 10.8 25.8 8.71 8.7 9.68 13.3 16.7 19.1 7.35 293 62.99 1975 310 1110 138 47.4 15.4 11.3 9.1 12.7 18.2 20.6 89.5 369 179.27 1976 331 348 208 68.1 115 9.5 10.9 11.4 19.7 55.9 86.1 65.6 110.77 1977 68.6 417 31.3 18.2 11.9 11.1 10.5 15.8 16.7 15.4 14.1 13.8 53.7 1978 378 83.4 85.4 64.8 11.4 7.65 6.85 11.7 9.58 11.4 11.9 13.6 57.97 1979 13.8 11.1 15.5 13.8 -9999 10.6 9.63 8.78 9.04 12.2 2.47 -9999 -9999 1980 0.5 102 23.5 8.9 9.9 10.3 9.39 -9999 11.7 16.5 19.4 3.82 -9999 1981 8.03 0.59 52.5 9.58 8.51 10.9 11.7 12.1 12.1 11.7 20.9 6.39 13.75 1982 6.45 14.9 15.8 14.9 15.2 14 12.5 17.6 22.8 21.7 20.5 20.6 16.41 1983 18.4 19.5 21.2 17.2 14.4 8.81 12.5 9.1 21.2 11.5 5.39 1.33 13.38 1984 0.37 11.6 22.9 20.1 6.83 2 16.4 29.3 34 32.6 15.1 10.7 16.83 1985 13 9.49 2.82 7.78 8.19 20.4 23.2 31.3 37.2 33.5 8.09 4.92 16.66 1986 3.01 2.86 17.6 7.07 8.01 17.4 19.6 28.6 29.2 -9999 -9999 -9999 -9999 Avg 72.18 136.14 45.83 24.92 18.14 12.32 14.66 19.61 24.07 25.99 23.88 53.34 42.08 Std Dev 112.2 247.08 50.11 22.53 22.91 6.15 7.9 9.36 11.64 12.87 22.97 96.14 41.06