文章摘要
唐若宜, 李发文.基于流域尺度的耕地时空格局演变与分异性研究Journal of Water Resources and Water Engineering[J].,2024,35(4):187-197
基于流域尺度的耕地时空格局演变与分异性研究
Spatiotemporal evolution of cultivated land on basin scale
  
DOI:10.11705/j.issn.1672-643X.2024.04.22
中文关键词: 耕地时空格局  核密度分析  耕地重心模型  水田旱地  水旱分异性
英文关键词: spatiotemporal distribution of cultivated land  kernel density analysis  the center of gravity model for cultivated land  paddy field and dryland  paddy-dryland heterogeneity
基金项目:国家自然科学基金重点项目(52239004)
Author NameAffiliation
TANG Ruoyi, LI Fawen (天津大学 水利工程智能建设与运维全国重点实验室天津300072) 
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中文摘要:
      流域尺度下的耕地分布跨度大,为探究流域耕地时空格局演变规律,基于1990、2000、2010、2020年4期土地利用遥感监测数据,以黄河、淮河、海河和长江4大流域为研究区,利用土地利用转移矩阵、重心模型、核密度方法分析流域耕地与其他土地利用类型转移情况、耕地重心迁移和耕地聚集特征,并对4大流域水田旱地分异现象进行分析。结果表明:1990—2020年间4大流域耕地面积均减小,其中海河流域耕地减小率最大,为9.16%;除海河流域耕地重心向西南方向迁移外,其他流域耕地重心均向东北方向迁移,整体耕地重心向北方向迁移,1990—2020年迁移距离分别为1.8、5.9和5.1 km;4大流域水田、旱地除部分水旱田调整外,主要是在林地、城乡用地和草地3种土地利用之间进行,转移主要发生在2010—2020年期间。1990—2020年黄河流域水田面积减少了9.35%,旱地面积减少了4.91%;淮河流域水田面积增加了3.51%,旱地则减少了7.10%;海河流域水田和旱地分别减少了70.46%和6.71%;长江流域水田和旱地分别减少了8.15%和1.72%。黄河、淮河、海河和长江4大流域为国家水网的主网,与本研究范围一致,研究成果可为进一步研究耕地资源与水网建设匹配性提供必要的前提。
英文摘要:
      Cultivated land distribution on the basin scale spans a wide range, in order to explore the evolution of spatial and temporal patterns of cultivated land in basins, four major basins including the Yellow River, the Huaihe River, the Haihe River and the Yangtze River were studied based on the land use remote sensing monitoring data in 1990, 2000, 2010 and 2020. The transfer of cultivated land to other land use types, the migration of gravity center of cultivated land and cultivated land aggregation characteristics, as well as the phenomenon of water and dry land differentiation in the four major basins were analyzed by the land use transfer matrices, the center of gravity model and the kernel density approach. The results show that the area of cultivated land in the four major basins decreased from 1990 to 2020, among which the reduction rate of cultivated land in the Haihe River Basin was the biggest, accounting for 9.16%. Except for the center of gravity of cultivated land in the Haihe River Basin, which migrated to the southwest, that in the other three basins all migrated to the northeast, with the overall center of gravity migrating to the north, and the distance of the migration during 1990-2020 was 1.8, 5.9, and 5.1 km, respectively. The land use transfer were mainly found between forest, urban & rural land use and grasslands, except for some adjustments of the paddy fields and dryland in the four major river basins, and the transfer mainly occurred during the period of 2010-2020. During 1990-2020, the area of paddy fields in the Yellow River Basin decreased by 9.35%, and the area of dryland decreased by 4.91%; the area of paddy fields in the Huaihe River Basin increased by 3.51%, while the dryland decreased by 7.10%; the paddy fields and dryland in the Haihe River Basin decreased by 70.46% and 6.71%, respectively; and the reduction rate of paddy fields and dry land in the Yangtze River Basin was 8.15% and 1.72%, respectively. The four major basins are the arteries of the national water network, which is consistent with the scope of this study, and the research results can provide the necessary prerequisites for further research on the matching between cultivated land resources and the construction of water network.
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