Coastal Processes, Water Quality and Aquatic Ecology Talk Toondah recording
Saturday 1st August 2020, 1:30pm
Questions answered during the session:
- 3:36: Are you measuring chemicals attached to suspended solids and to biofilms on substrate, to determine what chemicals are present?
- 4:57: Is it likely that after completion of the project, water quality and aquatic ecology will be superior to the current situation?
- 6:00: Who pays for ongoing maintenance of waterways. Channel Dredging, foreshore maintenance etc?
- 8:33: How does the proposed development impact on the existing coastal processes?
- 9:59: How has climate change been considered for the development, eg sea level rise etc?
- 11:24: Won't acid sulfate soils destroy the bay?
- 12:18: What is the sensitivity of the measurements of pollutants, toxins etc? Because lipophyllic toxins for example such as some synthyetic pyrethroids are toxic at 23 parts per trillion but measurements are accurate to 2 parts per milion, 20 years ago. A large problem in Moreton Bay is hormone disrupters mostly oestradiols which are toxin to salmon embryos at 1 ppb, can current measures detect such a low concentration?
- 13:37: A general question, which I appreciate is off topic, but how do we find out about other aspects such as traffic considerations? Perhaps just some guidance on how to find out about broader issues?
- 14:48: Craig Witt - it sounds like the Coastal Process modelling is still under way. Is that correct?
- 15:55: Carol, Which NATA lab did you use?
- 17:25: Where is the drop in centre?
- 18:30: In other parts of the world, communities are pulling back from coastal areas, in acknowledgment of / preparation for sea level rise. In this context, how can Walker justify driving/ proposing a massive in-ocean coastal build?
- 22:04: Will the project cause erosion or siltation in new areas?
- 23:30: I assume there will be ongoing dredging to maintain the channel, where will the future dredge spoil be deposited?
- 25:28: What water quality controls are proposed for runoff from the land development into to the surrounding environment?
- 28:04: Does the Ramsar convention have any requirements in this area for coastal processes, water quality or aquatic Ecology?
- 28:50: I heard someone say that the project will destroy all the coral in Moreton Bay - is this true?
- 32:42: Carol, what is the the sediment / rock material like in the areas of the proposed marinas? What is the general depth of marine sediment? Is there any gravel present? What is the depth to rock and what type is it?
- 35:10: Are there dugongs in the Toondah Harbour PDA - I saw Australian Conservation Foundation saying that there are?
- 38:10: What are the current & future financial costs due to siltation/erosion from modelling?
- 40:41: Will the project impact on commercial oyster beds at Dunwich?
- 42:40: All - If your research indicates the negative impacts are insurmountable/ too great, would you recommend against the project going ahead?
- 47:37: What bathymetry data is Craig using around the development and for the wider Bay Area for his modelling? Source, date, accuracy?
- 51:24: How many RAMSAR sites in the 2400 sq km quoted by Craig Addley?
- 56:10: Carol - did you find any unusual, unexpected or sensitive vertibrates or invertibrates in your ecological survey? Similarly for plants?
- 63:00: Also are the EIS Terms of Reference available?
Responses to unanswered questions from the Coastal Processes, Water Quality and Aquatic Ecology Talk Toondah recording session
Thankyou for your comment regarding dugong being frequently observed in Raby Bay.
The eastern banks support the greatest number of dugong in Moreton Bay – with over 90% of the population using that area. However, dugong are also found in the southern bay area, including Raby Bay. It is thought the eastern banks area is favoured by dugong due to relatively clear water, the seagrass communities there are the ones they prefer, boat traffic is light, and deep-water refugia is close by (Lanyon et al., 2019).
Frc environmental would be keen to know how often you see dugong in Raby Bay, what time of year, and where you see them. Please contact the Community Engagement Team via firstname.lastname@example.org and they will pass the information along to Carol.
While some habitat for significant species will be impacted by the development, this has to be put in the context of the value of the habitat at the local level as well as the wider Moreton Bay Ramsar site level. It is also important to understand how those species affected might react to an impact such as this. These studies are currently being undertaken for the EIS and will be made available for public comment once completed.