Satellite-based monitoring and statistics for raft and cage aquaculture in China’s offshore waters |
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| Institution: | 1. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China;2. Nanjing University of Information Science and Technology, School of Marine Sciences, Nanjing, 210044, China;3. Chinese University of Hong Kong, Center for Housing Innovations, Shatin, New Territories, Hong Kong;4. University of Chinese Academy of Sciences, Beijing, 100049, China;5. School of Management, Shandong University, Shandong, 250100, China |
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| Abstract: | Based on Landsat 8 remote sensing images, a combination of an unsupervised classification algorithm and artificial review was used to extract areas for Chinese offshore raft and cage aquaculture in 2018. The results of the extraction showed that China’s 2018 coastal zone raft aquaculture area comprised 194,110 ha, of which the province having the largest raft aquaculture area was Jiangsu (28.77 %), followed by Fujian (20.42 %) and Shandong (13.11 %). The cage aquaculture area covered 57,847,799 square meters, of which the provinces with the largest cage aquaculture area were Fujian (64.81 %), Guangdong (17.45 %), and Liaoning (5.63 %). In addition, by combining high-resolution remote sensing image visual interpretation and field investigation, the classification of 1200 sample points in four regions was determined, and the accuracy of the aquaculture area extraction was found to be 87.35 %. The extraction results can be used not only to evaluate China’s aquaculture production but also offer significant reference value for scientific planning related to sea use, ecological environmental protection, and marine disaster prevention and mitigation. |
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| Keywords: | Remote sensing Aquaculture Coastal zone Landsat 8 Object oriented |
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