Grazing is the biggest land use in the Great Barrier Reef catchment area occupying 31.1 million hectares of land (73% of the catchment). Grazing lands can be vulnerable to soil erosion and are estimated to contribute 60% of the total load of fine sediment exports to the Great Barrier Reef. […]

Broadacre crops in Queensland other than sugarcane include grains such as wheat, barley, sorghum, maize, chickpea, and faba bean, and other crops including cotton, and cover 2.8% of the Great Barrier Reef catchment. Irrigated and dryland cropping contributes 4% of the total fine sediment load to the Great Barrier Reef.

Banana growing and horticulture cover 0.2% of the Great Barrier Reef catchment, and contribute around 1% of the total fine sediment load, 1% of total exports of dissolved inorganic nitrogen, and large amounts of pesticides to the Great Barrier Reef. Much less is known about the effectiveness of management practices

Urban areas cover 0.7% of the Great Barrier Reef catchment area and contribute 2% of the fine sediment load and 7% of dissolved inorganic nitrogen exports. A range of both structural measures (engineered; such as sediment control and upgrades to sewage treatment plants) and non-structural measures (such as policy, planning,