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气候引起的水文变化和劳伦西亚大湖地区的农业影响
Huy Dang1, Yadu Pokhrel1, Andrew D Gronewold2
1Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, United States.
The Science of the total environment
|January 17, 2026
概括
气候变化将显著改变劳伦西亚大湖盆地 (GLB),导致气温升高和降雨模式转变. 这些变化影响到水的可用性,农业土壤水分和湖泊水位,需要适应性水资源管理策略.
科学领域:
- 水文和气候科学 水文和气候科学
- 环境建模环境建模
- 水资源管理 水资源管理
背景情况:
- 淡水系统面临着前所未有的气候引起的压力,影响季节性模式和水文极端.
- 劳伦西亚大湖盆地 (GLB) 是一个重要的淡水资源,易受气候变化的影响,影响水资源管理和农业.
- 现有的GLB水文变化研究是分散的;缺乏全面的盆地范围评估.
研究的目的:
- 根据各种气候变化情景,对GLB的水文变化进行第一个全面的盆地范围评估.
- 预测对溪流,湖泊水位和地表水的长期影响.
- 为减轻风险和增强农业弹性提供适应性水资源战略的信息.
主要方法:
- 利用多模型气候和水文模拟.
- 集成的水力动力学建模用于盆地范围内的投影.
- 根据三个共享社会经济路径 (SSP1-2.6,SSP3-7.0,SSP5-8.5) 的历史基线 (1980-2014) 与预测条件 (2025-2100) 的比较.
主要成果:
- 预计到2100年盆地平均升温为3-8°C.
- 季节性降水变化:冬季/春季增加,夏季减少,导致春季高峰流量提早 (长达40天),土壤水分降低 (高达12%).
- 增加了地表水储量 (约20%),但干旱频率和湖泊水位上升的区域差异存在,可能达到新的高点.
结论:
- 气候变化正在推动整个GLB的重大水文变化.
- 这些转变给水资源管理和农业带来了风险,需要采取适应性战略.
- 预计的变化凸显了需要采取主动措施,以确保水资源的可持续性和农业的弹性.
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