The Great Cumbung Swamp: Hydrology and Geomorphology of the Lachlan River Terminus

The Great Cumbung Swamp in Eastern Australia is the terminus of the low-gradient Lachlan River. This dataset from the Australian Ocean Data Network, last updated in 2026, provides a detailed scientific description of the swamp's unique fluvial depositional environments, including the Lachlan channel, Phragmites marsh, and overflow areas. It describes the hydrological processes, sediment types, and geomorphic features that characterize this rare river termination without distributaries or lakes.

Use Cases

• Modeling low-gradient river termination processes based on the described channel morphology and water loss mechanisms.
• Studying wetland depositional environments based on the detailed classification of the swamp into channel, marsh, and overflow areas.
• Analyzing the relationship between flood frequency and vegetation (Phragmites australis) growth patterns described for the marsh.
• Comparing ancient fine-grained sediment deposits to the modern analogue of the Lachlan River's termination style described in the text.

Strengths

• Provides a detailed, process-oriented description of a unique river termination system.
• Includes specific quantitative observations, such as channel widths up to 40 meters and flood occurrence in 15-20% of years.
• Clearly delineates three distinct depositional environments within the swamp.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Australian Ocean Data Network

Collection Method

Likely contains scientific observation and analysis.

Time Range

null

Freshness

Last updated 2026-06-23 05:10:35.551630; freshness should be verified.

Geography

The Great Cumbung Swamp, terminus of the Lachlan River, Eastern Australia