“…As the large Peel-Harvey Estuary contains commercial and recreational fisheries and is widely used by residents and tourists for boating and other activities (Potter et al, 1983;Steckis et al, 1995;Lepesteur et al, 2008), it was decided to construct a deep second entrance channel to increase markedly the flushing of nutrients and organic material from this microtidal system and thereby reduce the extent of eutrophication (Gilles et al, 2004;Brearley, 2005;Elliott et al, 2016). The opening of this so-called Dawesville Channel in led to a tripling in tidal water exchange with the ocean, a marked increase in salinity, a 2-4 fold decrease in total phosphorous and nitrogen concentrations and a flushing of 10% of the estuary volume each day (Brearley, 2005;Ruibal-Conti, 2014;Elliott et al, 2016).…”