The categories in the photo are the essential conditions and molecular substances needed in a thriving aquatic environment. To the right of them are the levels and amounts of these substances Bowker Creek has. (ppm = parts per million)

The creekbed took a lot of design, research and thought. These curves benefit smaller creatures, by providing small areas for them to find shelter from the current. This supports more life in the stream. When the water rises, it flows in a predetermined way, purposefully designed for better flow and to reduce plant uprooting. 

There were two main types of Salmon that inhabited Bowker Creek; The Chum Salmon and the Coho Salmon. Above you will see a photo I created showing you the two different types of Salmon, male and female.

If salmon were to return to Bowker Creek, they would not only help the creek to reach a climax community, they would increase Bower Creek's connection to the community. Having salmon would make more people interested in helping with the restoration and learning about Victoria's ecosystems.

Nitrates get into Bowker Creek through garden and road runoff containing plant fertilizers. As there are few nitrate free fertilizers, a way to reduce the nitrate levels in the creek would be to control the amount of fertilizers used near the creek. If this problem were to be fixed, there could be enough dissolved oxygen for salmon. 

Could the salmon get through the tunnels at Bowker Creek? Most of the tunnels would be easy for the salmon to swim through; the only problem would be the sloped tunnel under Fireman's Park. The angle of the tunnel would prevent salmon from swimming up it. For salmon to swim through the creek, a small fish ladder must be put in this tunnel.

The planning of Bowker creek's plants was very thorough, as it needed to be a) aesthetically pleasing, b) Help filter toxins out of the water and c) discourage invasive plant growth.