Hawaii is receiving a federal grant worth nearly a half-million dollars to help it protect the state’s native forests and drinking water supply.

The state Department of Land and Natural Resources said Wednesday the money will supplement funds already appropriated by the state Legislature.

Department natural area reserves planner Emma Yuen says the money will enable the state to protect an additional 4,000 acres of forest.

The state in 2013 allocated millions of dollars to boost native forests by removing invasive species and planting native trees. Funds are also paying for the installation of fences that will keep out feral pigs, goats and other grazing animals that destroy native forests.

The state says restoring forests is the most cost-efficient way to absorb rainwater and replenish groundwater.