Lockhart River is a river in the Wheatbelt region of

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

. It is a sub-catchment of the Avon River, and has an area of . At its junction with the Yilgarn River to form the Salt River, it passes through a hydrological-topographical pinch-point at 'Caroline Gap' (a geomorphic saddle between Mt Caroline and Mt Stirling).

Catchment rivers

The Lockhart River catchment area is drained by the rivers: * Lockhart River originating from Lake Biddy. * Camm River draining from Lake King through Hyden to Kondinin where it meets the Lockhart River. * Pingrup River which arises near Lake Cairlocup and flows north to Lake Grace and the Lockhart River.

Stream flow

Stream flow measured in the Yilgarn and Lockhart Rivers since 1976 shows there to be annual flow through these systems, although flow volume is highly variable. Annual flow in the Lockhart River was in excess of in seven out of the 25 years of record, while in 10 years it was less than . Studies in 2008-09 gave the average annual total flow for the Lockhart River as 13 GL (compared to 4 GL for the Yilgarn River). Streamflow salinity in the Lockhart River is very high, similar to sea-water, and the highest in Western Australia.

Waterway assessments

The river was extensively surveyed in 2008/2009.

Notes

{{coord, 32, 00, S, 117, 54, E, display=title, region:AU_type:river_source:GNS-enwiki Rivers of the Wheatbelt region