下一代强度-持续-频率曲线用于整个美国大陆的不同土地
Hongxiang Yan1, Zhuoran Duan2,3, Mark S Wigmosta2,3
1Earth Systems Science Division, Pacific Northwest National Laboratory, Richland, WA, USA. hongxiang.yan@pnnl.gov.
Scientific data
|December 4, 2023
概括
下一代强度-持续-频率 (NG-IDF) 曲线现在包含土地使用土地覆盖 (LULC) 数据. 这一进步改善了水文基础设施的洪水预测,考虑到美国各地的雪融和雨雪事件.
科学领域:
- 水文学的水文学
- 环境科学 环境科学
- 土木工程 土木工程是指土木工程.
背景情况:
- 目前的水文基础设施设计依赖于基于降水的强度-持续-频率 (IDF) 曲线.
- 这些方法无法准确预测来自融雪或降雨事件的洪水,危及设计不足的基础设施.
- 现有的下一代IDF (NG-IDF) 曲线对开放条件不考虑土地使用土地覆盖 (LULC) 对流水的影响.
研究的目的:
- 扩大开放区域NG-IDF数据集,将八种植被土地使用土地覆盖 (LULC) 类型纳入其中.
- 为分析各种LULC下的水文极端事件提供大陆规模的数据集.
- 改进对基础设施设计风险的评估,了解LULC对洪水的影响.
主要方法:
- 开发NG-IDF 2.0数据集,整合整个美国大陆的LULC数据.
- 包括多样化的植被LULC:森林 (叶,常青,混合),灌木,草,牧场,作物和湿地.
- 对流水的水供应情况进行分析,考虑不同LULC的降雨,融雪和降雨与降雪事件.
主要成果:
- 该NG-IDF 2.0数据集提供了对各种LULC下的水文极端事件及其驱动因素的全面分析.
- 该数据集覆盖了美国大陆,为水文风险评估提供了广泛的空间范围.
- 它描述了可供排水的水,将融雪和降雨过程与LULC因子相结合.
结论:
- NG-IDF 2.0数据集是提高水文基础设施设计标准的宝贵资源.
- 它通过纳入LULC对洪水的影响,有助于评估基础设施设计风险.
- 提供了关于LULC变化如何影响洪水规模,机制,时间和雪水供应的见解.
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