Hi Kiyan,
Thank you for your questions. Unfortunately, I don’t have the answers to all of these questions. Luckily for you, we have our Community Insights Event tomorrow with WaterAid at 3-4pm AEST. There will be a Q&A at the end but I can try my best to include this question in the main section of the meeting too. Your tutor should have more information regarding the event.
There have been previous student questions on the water retention ponds that have been answered on the discussion forum. I recommend sifting through the forum as you may find the answers in there.
Kind regards,
Evelyn