Evaluation Of Marine Ecological Security In Ningbo City Based On RS Technology

China is a big ocean country but a weak ocean country.The output value of ocean economy only accounts for 9.4% of GDP.After entering the 21 st century,the ocean has once again become the focus of the world’s attention,and the national strategic position of the ocean has been improved unprecedentedly.Following the world trend,the CPC Central Committee and the State Council have put forward the grand goal of " gradually building China into a powerful marine economy".The marine ecological environment has also been polluted due to economic development.At this time,the importance of marine ecological security research has been highlighted.Zhejiang is also a large marine province.In the 12 th Five-Year Plan,Zhejiang proposes to build a strong marine economy province.The economic development has caused serious ecological damage.Taking Zhejiang’s marine ecological security as the breakthrough point,the aim is to set the marine economy on the path of sustainable development and formulate a green marine economic development strategy with high goals and high starting points.The evaluation of marine ecological security is very necessary and valuable,which can provide decision-making basis for the development of marine economy.However,the number of domestic related academic research is not very large,indicating that people’s attention to marine ecological security can be continuously strengthened.In Zhejiang Province,Ningbo City is taken as the research object,and three primary index systems of marine ecology,marine economy and marine society and 29sub-index systems are constructed from three aspects of ecological carrying capacity,ecological footprint and interference factors.Using RS technology theory,AHP and entropy weight method to establish an index evaluation system,then using RS technology to extract relevant data needed for dynamic research,combined with comprehensive evaluation method and literature review methods to evaluate.According to the final data and images,Ningbo’s marine ecologi.