Mapping China’s offshore mariculture based on dense time-series optical and radar data  

作　　者：Xiaoliang Liu Zhihua Wang Xiaomei Yang Yueming Liu Bin Liu Junyao Zhang Ku Gao Dan Meng Yaxin Ding 

机构地区：[1]State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing,People’s Republic of China [2]University of Chinese Academy of Sciences,Beijing,People’s Republic of China

出　　处：《International Journal of Digital Earth》2022年第1期1326-1349,共24页国际数字地球学报（英文）

基　　金：supported by the National Key Research and Development Program of China[grant number 2021YFB3900501];the National Natural Science Foundation of China[grant number 41671436,41901354,41890854];the Innovation Project of LREIS[grant number O88RAA01YA].

摘　　要：Due to the weak information about cultural targets in the complex marine environment,an omission problem exists in large-scale mariculture extraction using single-view and single-source images.To overcome this problem,we developed a mariculture extraction method that combines dense time-series Sentinel-2 and Sentinel-1 data.A high-precision Chinese mariculture distribution map for 2020 was produced with an overall accuracy of 94.00%and a kappa coefficient of 0.91.The results show that(1)the total area of mariculture was 1173249.22 ha on the national scale,which was significantly larger than the previous studies(459595.70 and 205920.28 ha,respectively),with Shandong Province(39.09%)having the largest proportion;(2)China’s mariculture presented a spatial distribution characteristic of‘Denser North and Sparser South’,and mariculture was centralized in the coastal zones of the northern provinces(60.76%)rather than the southern provinces;(3)the official production statistics and remote sensing-derived mariculture area revealed a highly corresponding trend at the provincial level,with an R2 reaching 0.78,which is much higher than the 0.07 and 0.41 values of the comparison data.The results directly provide data reference for mariculture production estimation and site selection or ideas for mariculture extraction in other regions and globally.

关 键 词：AQUACULTURE MARICULTURE multi-source remote sensing time-series China’s coastal zone 

分 类 号：S9[农业科学—水产科学] TN95[电子电信—信号与信息处理]