Moreton Bay has been affected by soil run-off. The health of Moreton Bay, since 2002.
The environmental health of Moreton Bay has declined again because of soil running into the region’s waterways, according to the latest data from Healthy Waterways.
The not-for-profit group gives an annual score – from A to F – for the health of 19 river and stream catchments in southeast Queensland.
Its new report shows the biggest falls in water quality have been at Bramble Bay (from D+ to F), Redlands (from D+ to F) and Moreton Bay overall (from B- to C).
Professor Jon Olley, a member of the Healthy Waterways Scientific Panel, and a member of the Australian Rivers Institute said soil run-off was again having an impact on seagrass beds in Moreton Bay.
“Last year, the health of seagrass beds and corals appeared to improve slightly,’’ he said.
‘‘However, this year corals and seagrasses are showing signs of ongoing stress and decline due to the large amount of mud and nutrients deposited into Moreton Bay during the 2011 and 2013 floods.’’
He said improvements to sewage treatment plants had helped, but simple erosion was behind most of the damage to the health of the region’s waterways.
“The investment in wastewater treatment plant upgrades has been effective in lowering the nutrient loads in many estuaries,’’ he said.
‘‘However, to further protect waterway health and improve report card results, we must address diffuse source pollution by reducing the amount of mud and nutrients washing off the land into our waterways.’’
On Tuesday erosion and sediment control expert Ben Starr told Fairfax Media that – on average – 150 tonnes of soil from every hectare of construction sites in southeast Queensland washed into waterways every year.
The comments from Mr Starr, of O2 environmental consultants, come amid concerns construction crews are not taking enough steps to prevent soil being washed away from works sites.
Southeast Queensland’s waterways provide more than $5 billion per year to the region’s economy through industry, tourism, recreation and fishing, according to Healthy Waterways chair Leith Boully.
Healthy Waterways report key facts
– The score for Bramble Bay, in the Redcliffe area of Moreton Bay, has dropped from a D+ to an F
– Overall, Moreton Bay’s score has dropped from a B- to a C
– Water quality has deteriorated slightly, from a D+ to a D- in the Lower Brisbane Catchment
– The mid-Brisbane catchment’s score has improved from an F to a D-
There have been small improvements in freshwater and estuarine catchments across the
Noosa River – up from B to B+
Maroochy River – down from C to C-
Mooloolah River – up from C to B+
Pumicestone Catchment – down from C- to C
Caboolture River – down from C+ to B
Pine River Catchment – down from C to B+
Lower Brisbane Catchment – down from D+ to D-
Oxley Creek Catchment – steady at D-
Redlands Catchment – down from D+ to F
Logan River Catchment -down from D+ to D
Albert River Catchment – steady at C+
Pimpama/Coomera Catchment – drop from B- to B
Nerang Catchment – improvement to B to B+
Tallebudgera and Currumbin catchments – up from B+ to A
Bremer River – C to C-
Lockyer River Catchment – drop from D- to D
Mid Brisbane Catchment – improves from F to D-
Upper Brisbane Catchment – steady at C
Stanley River Catchment – steady at B
Further information at www.healthywaterways苏州纹眉学校
This article first appeared in Hangzhou Night Net.