Seqwater has identified water hyacinth infestations near the Cedar Grove Weir on the Logan River.

Aquatic weeds like water hyacinth, salvinia and cabomba are very invasive, often out-competing native species.

Weed seeds can be carried from place to place on everything from boots to boats. The type of weed and abundance of infestation is mainly dependent on seasonal influences and inflows following rain. The rate of growth increases over summer, while floodwaters can introduce new weeds into lakes and dams. Under certain conditions, some aquatic weeds can double in size every four to five days.

We will be working with other landholders and local councils to manage these infestations. Treatment methods may include installing a weed boom above the weir.

For more information about our weed management program, email or call 1800 771 497.