Fine sediments (particles 2mm) in rivers and streams generally result from land management activities such as forestry, agriculture or development. Their ecological effects can be highly damaging (Owenes et al., 2005). In suspension, fine particles interfere with biological processes (e.g. reduced sunlight penetration impairs plant growth) and behaviours (e.g. restricting the ability to find prey). When deposited, fine sediments can smother the riverbed and restrict the infiltration of oxygen-rich free-flowing water.