系统评估子长度,形状和纵向斜率,并模拟高速公路下水流量,以更好地设计子
Sujit A Ekka1,2, William F Hunt3, Richard A McLaughlin4
1Stormwater Engineering Group, Department of Biological and Agricultural Engineering, North Carolina State University, PO Box 7625, Raleigh, NC, 27695, USA. saekka2@ncsu.edu.
Environmental science and pollution research international
|November 7, 2024
概括
更长,更平坦的草和形的形状有效地减少道路排水污染物,如沉积物和重金属. 在雨水管理中,最佳的植被对于最大限度地提高水的性能至关重要.
科学领域:
- 环境工程 环境工程
- 水资源管理 水资源管理
- 城市水文学 城市水文学
背景情况:
- 由于污染物负载,公路排水带来了重大的环境挑战.
- 草为雨水输送和处理提供了一种具有成本效益的解决方案.
- 有限的设计指南可用于优化swale性能.
研究的目的:
- 为了评估风设计因素 (长度,形状,斜率) 和风暴大小对道路冲水管理的影响.
- 确定最佳的配置,以减少污染物,如TSS,营养物质和重金属.
- 为swale设计和实施提供数据驱动的建议.
主要方法:
- 在北卡罗来纳州的罗利建造了八个不同长度,形状和坡度的草.
- 利用现场水库的合成排水来模拟高速公路排水情况.
- 对体积,TSS,,和四种重金属 (铜,,,) 的输入和排放量进行测量.
主要成果:
- 鱼的长度,形状,纵向斜率和风暴大小显著影响了流水量减少.
- 较长的 (30米),在更平坦的 (1%) 斜坡上的梯形,最大限度地减少了小到中型风暴的沉积物和重金属.
- 所有的形配置都输出了和;较长的形显示出更好的整体污染物负载减轻,除了溶解.
- 较大的风暴导致污染物和体积缓解的适度减少.
结论:
- 建议最大限度地扩大管长度,以提高污染物负载的降低,特别是在管道末端系统.
- 梯形形的横截面优于雨水处理的三角形.
- 有效的植被建立和维护 (最佳的草高度) 对于子的功能至关重要.
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