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模拟风力对水流和山坡稳定性的影响,在受VAIA风暴影响的山区流域中
1Department of Land, Environment, Agriculture and Forestry, University of Padova, Agripolis, Viale dell'Università 16, 35020 Legnaro, PD, Italy.
The Science of the total environment
|June 21, 2023
概括
风流大大改变了森林的流水,增加了山体滑坡的风险. 空中激光扫描和水文模型量化了这些影响,帮助风力扰乱地区的森林管理.
科学领域:
- 林业林业 林业 林业 林业
- 水文学的水文学
- 地质形态学 地质形态学
- 遥感 遥感 遥感 遥感
背景情况:
- 风流会对森林生态系统造成重大水文和地形学干扰.
- 空载激光扫描 (ALS) 为详细的过程调查提供高分辨率的地形数据.
- 了解风力投对流水和地形稳定的影响,对于风险管理至关重要.
研究的目的:
- 为了研究风流,流水变化和山坡故障之间的相互作用,在一个容易发生山体滑坡的山流域.
- 量化流水变化和预测风暴诱导的土地覆盖变化导致的地形不稳定性.
- 评估ALS数据和水文模型在分析这些现象中的有效性.
主要方法:
- 空载激光扫描 (ALS) 在维亚风暴前后采集数据.
- 为两个不同的场景制定数字地形模型 (DTM).
- 水文 (HEC-HMS) 和地形 (RESS) 模型的应用.
- 回归分析用于流水变化相关性和D2PC/TSS用于不稳定性预测准确性.
主要成果:
- 风暴显著改变了当地排水制度,最大相对排水增幅为2.56%和3.12mmh-1.1的差异.
- 在风流发生和流水变化之间发现了强烈的相关性 (R2 = 0.76).
- 这项研究成功地预测了很高准确度的浅地滑坡激活 (D2PC = 0.076,TSS = 0.898).
结论:
- 风力投在改变当地排水和促进山坡失效方面发挥着关键作用.
- 来自ALS的数据和水文建模是评估风力冲击影响的有效工具.
- 研究结果为风力受影响地区的森林管理和干预策略提供了宝贵的见解.
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