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2000年至2020年全球斜坡土地城市化的特点和影响
Jiating Lu1, Qiuzhi Peng2, Yufei Song1
1Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China.
The Science of the total environment
|May 25, 2024
概括
在全球范围内,城市化正在越来越多地扩展到斜坡土地上,覆盖16383平方公里,容纳3478万人. 这一趋势影响着土地覆盖面,需要平衡可持续城市发展.
科学领域:
- 城市地理 城市地理
- 环境科学 环境科学
- 地理信息学是一种地理信息学.
背景情况:
- 由于土地的可用性,城市传统上会在平坦的地形上扩大.
- 城市人口的增加和土地稀缺正在推动向斜坡土地 (SLU) 的扩张.
- 全球SLU的模式和影响仍然不太清楚.
研究的目的:
- 调查2000年至2020年间斜坡土地城市化 (SLU) 的全球特征和影响.
- 量化SLU的范围及其对整体城市扩张的贡献.
- 分析与SLU相关的土地覆盖面变化.
主要方法:
- 利用了高精度的全球数字高度模型 (FABDEM) 数据.
- 使用的全球土地覆盖数据集 (GlobeLand30) 用于土地覆盖分析.
- 分析了全球26,402个城市住宅区的SLU模式和影响.
主要成果:
- SLU 面积为 16,383 平方公里,占 2000-2020 年全球城市扩张的 9.54%.
- SLU主要转换了耕地 (42.78%),森林 (24.35%) 和草原 (21.83%).
- SLU容纳了3478万人,保护了8922平方公里的平坦耕地,但导致了4373平方公里的绿色生态土地的净损失.
结论:
- SLU是一个广泛的全球现象,集中在特定的国家.
- SLU具有双重效应:保护平面土地,同时造成生态损失.
- 平衡SLU的影响对于实现可持续的全球城市化至关重要.
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