East Brook

Basin : Warren River

Catchment : Warren River

River condition at the East Brook site (site code: WR104EAST1, site reference: 6074013) in the catchment of the Warren River was assessed between 7–8 December 2022. The site was previously assessed during August 2020, though only aquatic biota (fish and crayfish) were assessed.

Healthy Rivers assessments are conducted using standard methods from the South West Index of River Condition (SWIRC), which incorporates field and desktop data from the site and from the broader catchment. Field data collected include the following indicators, assessed over about a 100 m length of stream:

Aquatic biota: fish and crayfish community information (abundance of native and exotic species across size classes, general reproductive and physical condition)
Water quality: dissolved oxygen, temperature, specific conductivity, and pH (logged in-situ over 24 hours), as well as laboratory samples for colour, alkalinity, turbidity and nutrients
Aquatic habitat: e.g. water depth, substrate type, presence of woody debris and detritus, type and cover of macrophytes and draping vegetation
Physical form: channel morphology, bank slope and shape, bioconnectivity (barriers to migration of aquatic species), erosion and sedimentation
Fringing zone: width and length of vegetation cover within the river corridor and lands immediately adjacent, structural intactness of riparian and streamside vegetation
Hydrology: measures of flow (velocity) at representative locations (compared against data from stream gauging stations within the system)
Local land use: descriptions of local land use types and activities (compared against land use mapping information for the catchment)

Other departmental data: The East Brook site is located at the Department of Water and Environmental Regulation’s (the department) flow gauging station known as East Brook - Burma Road (site reference: 607038), which has been in operation since June 2012.

Search the site code or site reference in the department’s Water Information Reporting (WIR) system to find data for this site and nearby sampling points (flows, surface water quality, groundwater monitoring, the department's meteorological data). See also the Bureau of Meteorology website for additional meteorological data for the area.

Condition summary

The image below represents conditions during the December 2022 assessment – further images are also provided in the gallery at the bottom of the page.

An overview of aquatic species found at the site is provided in the next section. For other site data, please contact the department’s River Science team (reference the site code and sampling dates).

Species found in subcatchment

This includes all species found within the subcatchment of the assessment site, from this and previous studies in the area. The photos are linked to more information about each species, including maps of where they are expected across the south-west.

Native Species

Exotic Species

Species found at the site

Fish and crayfish

The species expected to occur here are based on species found at the site and elsewhere within the wider subcatchment. As differences in habitat within a reach naturally influence species distributions, and variability in methods between sampling programs can affect the species caught, this list is only indicative.

Only fish and freshwater crustaceans (crayfish and shrimp) that typically inhabit river channels are targeted by the standard SWIRC sampling methods.

Note: collection of fauna from inland aquatic ecosystems across Western Australia requires a licence from the Department of Primary Industries and Regional Development (DPIRD) and the Department of Biodiversity, Conservation and Attractions (DBCA). All species collected must be reported to these agencies as part of licence conditions.