Sea Utilization of Different Marine Industries in the Bohai Economic Rim

Improving the economic efficiency of marine space resource utilization is an important measure for building maritime power. This study analyzes the sea utilization in different marine industries in the Bohai Economic Rim by constructing a mathematical index, including the diversity of the marine industrial structure, economic efficiency, and an index of water quality. The conclusions drawn are as follows: (1) Fisheries and coastal tourism are the major marine industries in the Bohai Rim region, and their distribution is concentrated. (2) Diversity of the marine industrial structure is generally low in the Bohai Rim, in Liaoning, which has a value of less than 20%. (3) Economic efficiency, which has basically been positively related to the diversification index, is good overall in the Bohai Rim. (4) The overall degree of water quality is better than the Grade III of the water environment quality. The impact of the marine industries on water quality is obviously different. Sea utilization for marine transportation, protection of marine resources, and sewage dumping has a significantly negative impact on marine water quality.