A replanting program for Queensland farms could stop sediments and contaminants from reaching the Brisbane river.

The Queensland project to be launched by the Port of Brisbane and Queensland Urban Utilities this month will stop 16,000 tonnes of sediment containing 11 tonnes of nitrogen and 22 tonnes of phosphorus each year.

This comes after reports that the Brisbane River has reached a tipping point in nitrogen and phosphorus levels and the project will help slow storm flow and reduce up to a meter off potential flood levels.