Nillumbik Shire

Large severe floods within the municipality generally occur as a result of a moist warm airflow from northern Australia bringing moderate to heavy rainfall over a period of 12 or more hours following a prolonged period of general rainfall. The general rainfall 'wets up' the catchments and partially fills both the on-stream dams and the natural flood plain storage.

These combine to increase run-off generated during the subsequent period of heavy rainfall.

Riverine flooding of the Diamond Creek, Plenty River, Wilsons Creek, and Yarra River have historically caused issues for the shire.

Are you at risk of flood?

The Diamond Creek begins on the Kinglake Plateau and flows through St Andrews, Hurstbridge, Diamond Creek and Eltham before entering the Yarra River at Eltham. The township of Diamond Creek can be affected by the flooding of the Diamond Creek, where water can overflow the banks following prolonged rainfall.

Additionally, some of the smaller creeks in the area have been known to burst their banks during short, high intensity storms that can cause flash flooding in the area.

Roads that may be subject to flooding in Diamond Creek during a 1% flood include the following: 

• Main Hurstbridge Road

• Araroo Court

• Diamond Street  

• Edinburgh Street

• Elizabeth Street

• Everleigh Drive

• Reserve Circuit

• Watkins Street

The map to the right shows the impact of a 1% flood in Diamond Creek. A 1% flood means there is a 1% chance of a flood this size happening in any given year. This map is provided as a guide to possible flooding in the area.

Are you at risk of flood?

The Diamond Creek begins on the Kinglake Plateau and flows through St Andrews, Hurstbridge, Diamond Creek and Eltham before entering the Yarra River at Eltham.

The township of Eltham can be affected by the flooding of the Diamond Creek, where water can overflow the banks following prolonged rainfall. Additionally, some of the smaller creeks in the area have been known to burst their banks during short, high intensity storms that can cause flash flooding in the area.

The table to the right show roads that may be subject to flooding in Eltham during a 1% flood.