黄河流域近40年土地利用/覆被时空变化特征
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1.河海大学;2.水利部黄河水利委员会水文局

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国家自然科学基金项目(面上项目,重点项目,重大项目),国家重点研发计划项目


Spatiotemporal Characteristics of Land Use/Cover Changes in the Yellow River Basin over the Past 40 Years
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Hohai University

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    摘要:

    研究土地利用/覆被时空变化特征对于黄河流域土地资源保护与合理开发具有重要意义,可为黄河流域生态保护与高质量发展战略实施提供重要参考。基于黄河流域1980—2021逐年土地利用/覆被数据,采用Mann-Kendall和滑动t检验、地学信息图谱、标准差椭圆和重心迁移模型等方法,探究近40年黄河流域土地利用/覆被变化特征。结果表明:(1)1980-2021年林地、灌丛、水域、建设用地显著增加,耕地、草地、湿地显著减少。(2)流域土地利用/覆被变化时段可划分为1980—1992、1993—2001、2002—2012、2013—2021,数量结构逐渐呈现快速变化特点,建设用地、湿地和水域变化敏感。土地利用结构均衡度逐渐增强,呈现的阶段性变化与实施的重大战略措施关联性高,并与划分的阶段较符合。(3)流域中上游以2012—2021年和间歇变化型、耕地和草地的相互转换为主,下游以2001-2012年和2012-2021年变化型、耕地转为建设用地和草地为主。流域内宁夏北部、内蒙古东部及部分沿黄河水系分布的地区变化频繁。(4)湿地、水域和建设用地的重心向西迁移,分别呈现向西南集中分布、向东分散、向西北集中分布态势。土地利用结构在政策导向下总体趋势变好,未来应重点关注湿地以及土地利用变化频繁的地区。

    Abstract:

    The study of spatial and temporal characteristics of land use/cover is important for the conservation and rational development of land resources in the Yellow River Basin, and can provide important references for the implementation of ecological conservation and high-quality development strategies in the Yellow River Basin. The year-by-year land use/cover data of the Yellow River Basin from 1980 to 2021 was used to explore the land use/cover change characteristics of the Yellow River Basin for nearly 40 years by using Mann-Kendall and sliding t-test, geographic information TUPU, standard deviation ellipse and gravity center transfer model. The results show that (1) The forest, shrubland, water, and construction land significantly increasing and cropland, grassland, and wetland significantly decreasing from 1980 to 2021. (2) The periods of land use/cover change in the watershed can be divided into 1980-1992, 1993-2001, 2002-2012, and 2013-2021, and the quantitative structure is gradually characterized by rapid changes. The construction land, wetland and water are more sensitive to change. The land-use structure is gradually becoming more balanced, showing phased changes that are highly correlated with the implementation of major strategic measures and are more in line with the phasing. (3) The middle and upper reaches of the basin are dominated by the 2012-2021 and intermittent change type, interconversion of cropland and grassland, while the lower reaches are dominated by the 2001-2012 and 2012-2021 change type, conversion of cropland to construction land and grassland. Frequent changes are found in northern Ningxia, eastern Inner Mongolia and some areas distributed along the Yellow River system in the basin. (4) The centers of gravity of wetland, water and construction land all move westward, showing concentrated distribution to the southwest, scattered to the east and concentrated distribution to the northwest, respectively. The overall trend of land use structure has become better under the policy direction, and in the future we should focus on wetlands as well as areas with frequent land use changes.

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  • 收稿日期:2023-09-07
  • 最后修改日期:2023-10-23
  • 录用日期:2023-10-25
  • 在线发布日期: 2024-01-25
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