Improvements

Gully Basket opened

The overflow flaps open up in heavy rain or if the collection baskets becomes full. Leaf litter under these circumstances will flow unfiltered into the lake. This is the limitation of the current design and reduces the chance of the drain becoming blocked causing flooding.

Unfortunately large amounts of leaf litter still end up in the lake!

It is important that the collection baskets are regularly cleaned. If  water flow through the basket is reduced, premature opening of the overflow flap during rain can occur reducing effectiveness.

The current cleaning schedule is once per month and after major rainfall events. Cleaning is done by contractors using a vacuum.

 

Basket Cleaning

FLOATING REED BEDS

Update! In 2017 Council indicated no measurable improvement in nutrient levels with the trial being a failure. Reed beds may be relocated in the future.

Floating Reed Beds are a mat of native sedges and rushes. The plant roots of the sedges and rushes grow and suspend into the water column beneath the floating mat.The plant roots then filter and process nutrients in the water body improving water quality within the lake. Root system from the reed beds in LHM below:

Roots

Rising nutrient levels have been a concern in the lake and if left to continue the upward trend will result in increased outbreaks of blue green algae. (see water TAB for more info)  THE FRB’S REMOVE WATER BOUND NUTRIENTS THAT HAVE FLOWED INTO THE LAKE FROM SURROUNDING PROPERTIES, PARKS AND DRAINS AND ARE THE ONLY SOLUTION. Gully baskets work to remove the solids from the drains but nutrients largely pass through them. They have no effect on nutrients that flow from properties or parks around the lake either.

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