In-channel sediment extraction for rehabilitation is commonly undertaken as an action to address bed build-up (aggradation) associated with excess sediment deposition from reaches up or downstream. Historically in-channel sediment extraction (e.g. for sand) has occurred commercially often resulting in the degradation of the channel both at the site, upstream and downstream. It has limited application and requires specialist technical input to ensure any potential adverse impacts are considered and mitigated as well as meeting legal requirements.
Sediment extraction works to rehabilitate the river may occur over the entire width of the riverbed, or on discrete deposition features (e.g. point bars). Sediment extraction works are also undertaken:
Potential benefits from this intervention:
Potential negative implications from this intervention:
Rutherfurd, I.D., Jerie, K. and Marsh, N. 2000. A Rehabilitation Manual for Australian Streams, Volumes 1 and 2. CRC for Catchment Hydrology and LWRRDC. Canberra.
Sims, A.J. and Rutherfurd, I.D. 2017. Management responses to pulses of bedload sediment in rivers. Geomorphology 294, pp.70-86.
Last updated: 10 June 2022
This page should be cited as:
Department of Environment and Science, Queensland (2022) Sediment extraction, WetlandInfo website, accessed 1 July 2022. Available at: https://wetlandinfo.des.qld.gov.au/wetlands/management/rehabilitation/rehab-process/step-4/intervention-options/sediment-extraction-mod.html