Redistribution of monosulfidic black oozes by floodwaters in a coastal acid sulfate soil floodplain

Richard T. Bush, Leigh A. Sullivan, Diane Fyfe, Scott Johnston

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


The observations presented in this paper illustrate that significant amounts of monosulfidic black oozes (MBO) were eroded from flood mitigation drainage canals and redistributed across a coastal floodplain during a flood event associated with extreme deoxygenation and a massive fish kill. MBO are organic materials enriched in iron monosulfides and thick layers can accumulate in drains affected by acid sulfate soils. Laboratory studies have demonstrated that MBO can react rapidly when brought into suspension to completely consume dissolved oxygen. The abundance of MBO in flood mitigation drains and their extreme reactivity implicated MBO in the acute deoxygenation of the Richmond River, north-eastern New South Wales, Australia, following a major flood in February 2001. The field observations of MBO redistribution provide valuable evidence to help explain how these materials may interact and contribute to the deoxygenation of floodwaters.

Original languageEnglish
Pages (from-to)603-607
Number of pages5
JournalAustralian Journal of Soil Research
Issue number5-6
Publication statusPublished - 2004
Externally publishedYes


Dive into the research topics of 'Redistribution of monosulfidic black oozes by floodwaters in a coastal acid sulfate soil floodplain'. Together they form a unique fingerprint.

Cite this