2000~2020年镇江市土地利用变化分析

Analysis of Land Use Changes in Zhenjiang City from 2000 to 2020

土地利用变化及景观分析有助于土地合理利用。文章以镇江市为研究区,选择2000~2020年每十年共三期土地利用数据,运用土地转移矩阵和景观格局分析方法,对地类从时间和空间方面进行了研究。结论表明:2000~2020年镇江市耕地、林地、明水面积逐年减少,草地和未利用地面积较小变化不大;建设用地逐渐增加。2000~2020年土地利用变化中耕地转换为林地,明水;建设用地是耕地主要来源。镇江市整体景观破碎化程度逐年增加,斑块形状由简单趋向复杂,整体聚集。耕地景观破碎程度增强,聚集性能良好;林地景观优势与聚集程度均下降;草地斑块数量少,优势度低,聚集度逐年分散;明水由大斑块逐渐变为小斑块;未利用地面积较小,各指数变化不大;建设用地数量多、斑块大、聚集程度高。研究结果为土地管理部门提供依据。

Land use change and landscape analysis contribute to the rational use of land. The article takes Zhenjiang City as the research area, selects three periods of land use data every decade from 2000 to 2020, and uses land transfer matrix and landscape pattern analysis methods to study land types in terms of time and space. The conclusion shows that from 2000 to 2020, the area of arable land, forest land, and open water in Zhenjiang City has been decreasing year by year, while the area of grassland and unused land has not changed significantly. The construction land has gradually increasing. Conversion of arable land to forest land and open water in land use changes from 2000 to 2020. Construction land is the main source of arable land. The overall landscape fragmentation in Zhenjiang City has been increasing year by year, with patch shapes shifting from simple to complex and aggregating as a whole. The fragmentation degree of farm-land landscape is enhanced, and the aggregation performance is good. The advantages of forest landscape and the degree of aggregation have both decreased. The number of grassland patches is small, the dominance is low, and the aggregation degree is scattered year by year. The bright water gradually changes from large patches to small patches. The unused land area is small, and the changes in various indices are not significant. There are a large number of construction land, large patches, and high degree of aggregation. The research results provide a basis for the land management department.