Water Resources Monitoring And Spatial Pattern Study In Chinese Aquaculture Area Based On High Score Remote Sensing Image

In order to strengthen the monitoring of aquaculture water resources,the current position and area of aquaculture in China are relatively accurately grasped,the resource of aquaculture is found out,the layout of aquaculture is planned reasonably,and the level and comprehensive effect of aquaculture development are further improved.In this paper,high-resolution remote sensing images are used as data sources,and a series of pre-processing processes such as atmospheric correction and orthorectification are carried out.According to the prescribed discriminant rules,the remote sensing water resources are divided into inland aquaculture water bodies(including inland ponds and Shantang Reservoir),large surface water bodies,typical nonaquaculture water bodies(including rivers,canals,salt fields,etc.),marine aquaculture water bodies(including seawater ponds,shallow sea facilities farming areas),various aquaculture water resources are classified and extracted,and finally the spatial distribution data of national aquaculture water resources are obtained,And through the comparison survey and GPS measurement data to verify the accuracy of remote sensing monitoring results,the total accuracy of different types of aquaculture waters is 90.05%,and the overall accuracy of the area is 91.13%,meeting the experimental needs.On the basis of this,taking the pond culture in Jiangsu Province as an example,based on the landscape ecology theory,combined with the landscape characteristics of the aquaculture ponds in the study area,six indicators were selected on the class-level to construct a spatial heterogeneous comprehensive evaluation system for the concentration of aquaculture ponds in Jiangsu Province.Based on the optimal analysis granularity,principal component analysis was used to study the spatial distribution difference pattern of aquaculture ponds in Jiangsu Province.Combined with the fishery statistical yearbook data,the typical indicators such as pond culture area and aquaculture yield were selected to analyze the spatial agglomeration of pond culture in 63 spatial units in Jiangsu Province.The results showed that:(1)The spatial distribution of spatial distribution of aquaculture ponds in Jiangsu Province was significantly different and unevenly distributed.The three counties(municipal districts)with relatively concentrated spatial distribution are Jinhu County,Suzhou Municipality and Lianyungang City.The three relatively dispersed counties(municipal districts)are Rugao City,Guannan County and Feng County.(2)Jiangsu Province Provincial pond culture has significant and positive spatial autocorrelation,and its spatial distribution presents a non-random geographical agglomeration pattern.The Hongze Lake in the central part,the Gaoyou Lake Basin and the Taihu Lake Basin in the south are the main producing areas of the pond farming industry in the province.(3)The research method based on landscape index and spatial autocorrelation can effectively combine quantitative statistics and spatial analysis,which can better reveal the spatial differentiation characteristics of aquaculture ponds in Jiangsu Province and the basic characteristics and spatial agglomeration pattern of pond culture.This study provides a reference for the development planning and industrial layout of pond culture in Jiangsu Province and promotes industrial transformation and upgrading.It has certain practical significance and reference value.