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Department of Water and Environmental Regulation HYANN V87 Output 08/02/2023 Site 609025 Blackwood River - Darradup Variable 151.00 Stream Discharge Volume in Megalitres Year Annual Days Rank Total Missing (Megalitres) ----------------------------------------------- 1956 647200 143 18 1957 703200 15 1958 771100 9 1959 182400 52 1960 548200 23 1961 792500 8 1962 334900 42 1963 1890000 2 1964 2140000 1 1965 703600 14 1966 509800 28 1967 1161000 5 1968 719100 13 1969 183800 51 1970 518000 25 1971 471700 31 1972 229300 50 1973 760000 10 1974 1436000 3 1975 503400 29 1976 240400 49 1977 262400 48 1978 553000 22 1979 138000 56 1980 301100 45 1981 517000 26 1982 546400 24 1983 1148000 6 1984 424500 33 1985 421300 34 1986 170000 53 1987 96800 59 1988 871200 7 1989 272800 47 1990 554000 21 1991 695000 16 1992 691000 17 1993 463100 32 1994 305400 44 1995 483600 30 1996 1210000 4 1997 420800 35 1998 512100 27 1999 754100 12 2000 4134 279 62 2001 0.0 365 68 2002 0.0 365 64 2003 0.0 365 65 2004 0.0 366 66 2005 0.0 365 67 2006 136600 30 57 2007 323900 43 2008 390300 38 2009 606600 20 2010 51070 61 2011 376000 40 2012 87220 60 2013 383300 39 2014 369600 41 2015 108600 58 2016 643700 19 2017 406900 37 2018 413800 36 2019 142100 55 2020 167000 54 2021 754100 11 2022 290300 46 2023 609.2 328 63 Total 32910000 2606 Minimum 609.2 Maximum 2140000 Mean 522400 Median 463100