4.2.4 Changes in Land Use in Poyang Lake.
The Transfer matrix calculated the transfer amount of different land features from 1980 to 2020, clearly showing the changes in different regions. It found that changes in land features mainly occurred after 2000. The amount of land surface conversion in the early stage was unapparent. After 2000, the most apparent land use change was the swap of ground objects, Cropland and Water’s area slightly increased, and the area of Forest and Grassland’s slightly decreased, the most apparent net change of area is the Settlement area expanded by 1.53% (Table 1).
The comparison of the image shows that the urban area expanded significantly after 2000 (Fig 10). the transfer matrix analysis verified an apparent conversion relationship between Settlement and Cropland. In addition, there is also a conversion relationship between Water and Other, and the conversion relationship is substantial. (Table2). In Fig 10, compared with 1980, around the Ganjiang river estuary, the Other land replaced the Water area, and mainly Cropland was overrun by Settlement in 2020. Also, the dramatic increase in Settlement and Cropland in the basin area means water utilization increased.