As part of an extensive Tasmania-wide survey, Buckney and Tyler analysed the chemistry of water samples from the Warra area, including the Huon River, Blakes Opening (peat pool) and the Weld River. In common with most of the south-western and western inland waters, the two former sites had the ionic proportions of seawater, the supply of ions being mainly from airborne sea spray. The Weld River sample, however, had been influenced by outcropping dolomite, being slightly alkaline and with high concentrations of calcium, magnesium and bicarbonate ions.