南京林业大学学报(自然科学版) ›› 2023, Vol. 47 ›› Issue (6): 263-271.doi: 10.12302/j.issn.1000-2006.202202007
收稿日期:
2022-02-13
修回日期:
2022-06-15
出版日期:
2023-11-30
发布日期:
2023-11-23
通讯作者:
*张浪(基金资助:
ZHANG Guilian(), YI Yang, ZHANG Lang()
Received:
2022-02-13
Revised:
2022-06-15
Online:
2023-11-30
Published:
2023-11-23
摘要:
【目的】城市化的快速发展使土地资源日益紧缺,城市园林绿化活动多在工业等搬迁地上开展。系统全面了解搬迁地的时空演变特征及其分布格局,可为城市生态空间规划与可持续管理提供重要支撑。【方法】基于GlobeLand30地表覆盖数据,采用叠加分析、空间自相关分析、方向分布分析和景观格局指数等方法,对近20年来我国333个地级行政区内人造地表变更为生态用地的搬迁地(下文简称搬迁地)数量变化进行分析,并对其空间分布格局进行研究。【结果】我国搬迁地的热点区域主要集中在华中、华南和东北地区,且其空间分布呈现显著的自相关关系;搬迁地的热点和冷点区域都有明显的方向性,热点区域逐渐向东北地区迁移,冷点区域逐渐向北方偏移;搬迁地局部空间自相关关系呈现HH(高值-高值)聚集、LL(低值-低值)聚集、LH(低值-高值)异常和HL(高值-低值)异常4种类型,以HH聚集和LL聚集为主,均有连片趋势,而LH异常零星分布在HH聚集周边,HL异常较少;搬迁地的斑块所占景观面积比例(PLAND)增加且斑块平均面积(MPS)逐渐减小,说明搬迁地逐渐以小斑块的形式增加。【结论】量化分析了我国地级行政区内搬迁地面积和比例,搬迁地分布多集中在中东部和南部等经济发达城市所在区域,搬迁地冷点区域主要集中在西南地区。
中图分类号:
张桂莲,易扬,张浪. 转为生态用地的中国搬迁地时空演变及其分布格局研究[J]. 南京林业大学学报(自然科学版), 2023, 47(6): 263-271.
ZHANG Guilian, YI Yang, ZHANG Lang. Spatial and temporal evolution and distribution pattern of China’s relocation land converted to ecological land[J].Journal of Nanjing Forestry University (Natural Science Edition), 2023, 47(6): 263-271.DOI: 10.12302/j.issn.1000-2006.202202007.
表2
中国搬迁地空间轨迹移动方向"
区域 region | 年份 year | 周长/km perimeter | 面积/km2 area | 中心点X center point X | 中心点Y center point Y | X轴长度 X-axis length | Y轴长度 Y-axis length | 方向角度/(°) direction angle |
---|---|---|---|---|---|---|---|---|
热点 hot spots | 2000—2010 | 33.68 | 80.28 | 116.70 | 35.56 | 3.81 | 6.71 | 37.16 |
2010—2020 | 32.91 | 82.34 | 117.54 | 34.85 | 4.30 | 6.10 | 31.93 | |
冷点 cold spots | 2000—2010 | 52.53 | 211.50 | 110.93 | 29.76 | 7.00 | 9.62 | 61.54 |
2010—2020 | 54.13 | 224.03 | 117.54 | 34.85 | 7.17 | 9.95 | 60.97 |
表3
中国搬迁地空间显著性聚集区景观格局特征"
年份 year | 类型 type | PLAND/ % | ILP/% | ILS | PAFRAC | Icohesion/ % | SMP/ km2 |
---|---|---|---|---|---|---|---|
HH | 8.93 | 0.03 | 652.07 | 1.42 | 52.47 | 17.10 | |
2000—2010 | LL | 2.54 | 0.02 | 140.90 | 1.41 | 49.75 | 16.60 |
LH | 3.85 | 0.08 | 52.12 | 1.37 | 52.61 | 19.60 | |
2010—2020 | HH | 12.50 | 0.01 | 632.80 | 1.43 | 54.12 | 16.60 |
LL | 10.87 | 0.09 | 90.09 | 1.43 | 46.88 | 15.70 | |
LH | 4.60 | 0.30 | 33.43 | 1.37 | 58.43 | 18.30 | |
HL | 11.92 | 0.42 | 17.58 | 1.43 | 77.82 | 41.80 |
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