通过恢复森林来确定减缓洪水的优先事项:值升高假设.
Jorge Hurtado-Pidal1, Mauricio Aguayo2, Oscar Link3
1Department of Territorial Planning and EULA-Center, Universidad de Concepción, Concepción, Chile; Department of Civil Engineering, Universidad de Concepción, Concepción, Chile.
Journal of environmental management
|November 30, 2024
概括
基于自然的洪水调节解决方案需要了解气候和土地利用影响. 这项研究在厄瓜多尔亚马逊发现了一个关键的高度值,这些影响转移到那里,指导有效的森林恢复战略.
科学领域:
- 水文和气候科学 水文和气候科学
- 生态学和环境管理
背景情况:
- 了解气候变化和土地利用/覆盖变化 (LUCC) 对洪水的影响对于有效的基于自然的解决方案 (NbS) 至关重要.
- 气候变化,LUCC和洪水动态之间的相互作用,特别是关于海拔梯度的相互作用,仍然不太清楚.
- 森林恢复是洪水调节的关键NbS,但其有效性取决于局部环境变化.
研究的目的:
- 调查气候变化和LUCC对洪水的影响在特定的高度值时突然变化的假设.
- 分析气候变化和LUCC对海拔梯度的洪水事件的孤立和综合影响.
- 在不断变化的环境条件下,作为NbS用于热带盆地的洪水调节,为森林恢复战略提供信息.
主要方法:
- 利用TETIS水文模型在各种气候和LUCC场景下模拟洪水事件.
- 根据SSP5-8.5情景,评估了合模型对比项目第6阶段 (CMIP6) 全球气候模型 (GCM) 的预测降水数据.
- 分析了42个流点的洪水动态,这些流点位于厄瓜多尔亚马逊的Tena流域的高度梯度上.
主要成果:
- 证实了海平面 (a.s.l.) 上590米的高度值的存在. 在那里观察到洪水行为的突然变化.
- 确定LUCC对洪水的影响在上游盆地占主导地位,而气候变化影响在下游盆地更为显著.
- 确定气候变化对洪水的影响在下游盆地中小型和中型洪水事件中尤为明显.
结论:
- 恢复原生森林是NbS在590米的海拔上方的优先事项,以有效规范洪水.
- 这些发现为NbS在面临气候变化的潮湿热带盆地实施提供了关键的见解.
- 这项研究强调了在规划洪水管理和恢复工作时考虑海拔梯度的重要性.
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