Irrigation quality of some stream waters in the Lockyer Valley, South-Eastern Queensland

Abstract

Based on analytical results, samples of stream waters were classified into four levels of salinity from a consideration of electrical conductivity measurements, and four levels of sodium assessed on the relationship between conductivity and the sodium adsorption ratio. At minimum stream How, salinity levels are high in most water from Deep Gully, Sandy, Ma Ma and Flagstone Creeks and in Lockyer Creek between the junction of Tent Hill and Flagstone Creeks. In the above catchments, areas of saline soil could be anticipated as a result of irrigation over a long period. A relationship between water quality and geological formations bas been suggested.