Moresby Estuary

The area of the Moresby estuary reporting zone can be defined by the pre-cleared extent of mangrove and saltmarsh remnant vegetation which is characterised by species that require periodic inundation of sea water.

This area extends approximately 3.3 km north and 2 km south of the river mouth along the coastline and extends approximately 12 km inland. The area includes numerous tributaries that drain into the main river channel.

Land use within the Moresby estuary area is dominated by cropping and pond aquaculture with some residential development. The Moresby locality is on the western fringe of the estuary area. The Port of Mourilyan is located near the mouth of the estuary and exports raw sugar and molasses from a loader, wharf and handling facility.

Scroll down for further detailed results for each indicator group.

Grading

gradesa1

very good

gradesb1

good

gradesc1

moderate

gradesd1

poor

gradese1

very poor

gradesnd1

insufficient data

gradesna1

not applicable

Confidence surrounding the data used in the circle diagrams has been assessed using a multi-criteria framework.

confidence

Water quality

Hover over each segment for indicator scores and data confidence.

A water quality overall score and grade cannot be provided for the Moresby estuary in 2014/15 due to insufficient data. Estuarine water quality monitoring for the Wet Tropics report card commenced 2016 in the Moresby estuary and will be available for future report cards.

Habitat and hydrology

Hover over each segment for indicator scores and data confidence.

The overall habitat and hydrology grade for Moresby estuary is ‘Moderate’.

The mangrove and saltmarsh extent scored 94.1 (Moderate) with 5.9 per cent loss from pre-clear to 2013. The riparian extent scored 100 (Good) with 13.2 per cent loss from pre-clear to 2013.

The seagrass condition scored 30.0 (very poor). The low seagrass score is due to the large scale declines in seagrass meadow condition recorded in the 2010-2014 periods across the Wet Tropics predominantly resulting from extreme weather events including storms and tropical cyclones.

Estuary riparian extent and mangrove and saltmarsh extent are updated every four years and the figures in the pilot report card are the most current. The data for both are due to be updated in 2017/18.

The methods for the flow and fish barrier indicators are currently under development and will be available for future report cards.

Note: Seagrass condition score is not calculated as the mean of the indicator scores. The seagrass condition score is calculated from the minimum indicator value at each site and the mean of the site scores. Refer to Wet Tropics Pilot Report Card Methods for more information.

Fish

Hover over each segment for indicator scores and data confidence.

The fish index is currently under development and will be available in future report cards.

Further information on the methods used to produce the scores and grades and detailed results can be found here.