"The purpose of the district is for the benefit, health, safety,  and welfare of the general public, marine life, near-shore environs and habitats, water quality, and the general environment of the Loxahatchee River and Jupiter Inlet. The authority and powers granted in this act are necessary to ensure safe navigation, environmental preservation, enhancement, and restoration and to maintain the Jupiter Inlet, including its seaward approaches, and also the Loxahatchee River, its tributaries, and adjacent waterways."