Abstract: The cage-fenced culture of reservoirs, especially drinking water source reservoirs, has a great impact on the water environment. High-resolution remote sensing is rich in spatial information and texture information, which can effectively extract the distribution information of cage culture. In this paper, the high-resolution satellite remote sensing image is used as the data source, and the human-computer interaction visual interpretation method is used to extract the cage-fenced culture information of inland waters such as the top ten reservoirs in Hunan province. The spatial distribution of cage culture is studied and estimated. The annual nitrogen and phosphorus emissions from cage culture provide a strong technical support for the supervision of the fisheries industry sector.

Key words: cage culture, GF-2, reservoir waters, remote sensing survey