基于多来源指标的三江元地区土地退化的综合评估
Changxian Qi1, Haiyue Peng1, Maqiang Xu1
1Xining Natural Resources Comprehensive Survey Center, China Geological Survey, Xining, 810021, China.
Scientific reports
|November 21, 2025
概括
桑江元地区的土地退化面临挑战,但最近的改善占主导地位. 未来的趋势可能会变得更糟,需要对这个脆弱的高海拔地区进行紧急的生态保护.
科学领域:
- 生态与环境科学 生态与环境科学
- 遥感和地理空间分析
- 可持续的土地管理
背景情况:
- 圣江元地区是一个高度脆弱的地区,面临着草原退化和荒漠化等严重的生态挑战.
- 这些问题威胁到区域生态安全和生态系统生产力.
- 有效的监测和管理策略对于这个脆弱的生态系统至关重要.
研究的目的:
- 开发和应用最佳土地退化指数 (OLDI) 来监测三江元地区的土地退化情况.
- 分析土地退化的时空模式和驱动因素.
- 为生态恢复和可持续管理提供科学证据.
主要方法:
- 使用受约束优化算法整合植被和土壤因素来创建OLDI.
- 应用趋势分析和驱动因素分析来评估土地退化动态.
- 对土地退化风险模式和影响因素进行空间显式分析.
主要成果:
- 土地退化风险从东南向西北逐步分布.
- 高风险退化土地占该地区的41%,中等风险为39%,低风险为20%.
- 在23年间,该地区27%的面积得到改善 (98,700平方公里),只有2%的面积退化 (7,700平方公里).
- 土地退化是由地形,气候和人类活动驱动的,空间差异很大.
结论:
- 尽管最近土地得到改善,但未来的趋势表明土地退化可能会增加.
- 紧急和优先的生态保护措施对于圣江元是必不可少的.
- 该研究为区域生态恢复和可持续的高海拔生态系统管理提供了有价值的数据.
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