在不和的根植土壤中,对早期降雨的水文反应
Hao Wang1,2, Rui Chen1,2, Anthony Kwan Leung3
1School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen 518055, China.
Heliyon
|May 26, 2023
概括
与均降雨相比,早期的高峰降雨加速了表面池和溢出. 植被通过增强土壤透和改变土壤结构来减轻这些影响,减少总体排水.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 水文学 水文学
背景情况:
- 植被对于海绵城市的基础设施来管理风暴事件至关重要.
- 早期高峰降雨对植被土壤的水文影响仍然不太清楚.
- 在植被土壤中精确测量湿面 (WF) 需要新的定量方法.
研究的目的:
- 引入一个新的WF追踪技术.
- 在降雨量较早的高峰条件下,研究在未和土壤中植被矮世界草的水文反应.
主要方法:
- 进行了土壤柱实验,以测量WF位置,矩阵吸水,体积含水量,表面池和溢出排水.
- 开发并验证了一种新的WF追踪方法.
- 在早期峰值和均降雨场景之间比较了水文参数.
主要成果:
- 新的WF追踪方法在所有测试条件下都证明有效.
- 与均降雨相比,早期的高峰降雨导致更早的开始和表面池和溢出速度的增加.
- 植被延迟了池/溢出,并通过促进透减少了总溢出量.
- 不同深度的根系显著改变了土壤的和残留水含量和孔状结构.
结论:
- 与均降雨相比,早期高峰降雨带来了明显的水文挑战,需要具体的管理策略.
- 植被,特别是矮世界草,通过改善透,在减轻强降雨的不利水文影响方面发挥着至关重要的作用.
- 根结构显著影响土壤的液压特性,影响水的保留和运动.
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