蒸发需求干旱指数的评估,用于马来西亚半岛干旱分析
Cia Yik Ng1, Wan Zurina Wan Jaafar1, Faridah Othman1
1Department of Civil Engineering, Faculty of Engineering, Universiti Malaya, Malaysia.
The Science of the total environment
|January 26, 2024
概括
蒸发需求干旱指数 (EDDI) 有效地监测了马来西亚半岛干旱的演变. 该工具与其他指数有很强的相关性,对干旱预警系统非常有价值.
科学领域:
- 水文和气候科学 水文和气候科学
- 环境监测 环境监测
背景情况:
- 有效的干旱监测对于开发及时的预警系统至关重要.
- 了解干旱的时空演变是水资源管理的关键.
研究的目的:
- 评估蒸发需求干旱指数 (EDDI) 作为半岛马来西亚干旱指标.
- 与现有指数相比,评估EDDI在捕捉干旱开始,演变和消亡方面的表现.
主要方法:
- 在EDDI,SPI和SPEI上使用修改的曼-肯达尔和森的斜率测试进行趋势分析.
- 对多个时间尺度上的历史干旱事件的EDDI,SPI和SPEI进行比较分析.
主要成果:
- EDDI显示了与SPI和SPEI的强烈时空相关性.
- 在识别历史干旱方面,EDDI的表现与SPI和SPEI相当.
- 半月一次的EDDI (2周) 准确地反映了干旱的严重程度和持续时间.
结论:
- EDDI是马来西亚半岛干旱预警的一个有价值和有效的工具.
- EDDI对大气条件敏感,为基于降水的指数提供了替代方案.
- 进一步的研究应该调查快速干旱机制和蒸发在干旱传播中的作用.
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