在实验性河流洪水事件中,污染物从vadose区域到地下水的调动
Rakiba Sultana1, Raymond H Johnson2, Aaron D Tigar2
1Department of Geosciences, University of Wisconsin-Milwaukee, 3209 N. Maryland Ave, Milwaukee, WI 53211, United States.
Journal of contaminant hydrology
|June 27, 2024
概括
河流的洪水将和硫酸盐从毒区调动到地下水中. 孔水中的污染物和蒸发物被运送到洪水之前,在这些事件中增加地下水污染.
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 地质化学 地质化学
背景情况:
- 自然河流的洪水可以从瓦多斯区调动污染物,增加地下水污染.
- 了解这些事件期间的污染物运输对于有效的补救策略至关重要.
- 和硫酸盐是重要的污染物,通常在瓦多斯区和地下水中一起发现.
研究的目的:
- 在模拟的河流洪水事件中调查污染物质量和从vadose区域到地下水的运输机制.
- 为了量化和硫酸盐在透事件期间的释放.
- 将污染物运输与非反应性痕迹剂进行比较.
主要方法:
- 进行了两次现场控制的河流洪水实验,使用化物,化物和2,6-difluorobenzoate标记物.
- 透了8立方米的追踪河水进入一个直径为3米的盆地,允许它通过瓦多斯区透到一个不受限制的含水层中.
- 在40天内监测了13个临时井的溶液度,使用Theissen多边形方法分析污染物质量,并使用时间时刻进行运输.
主要成果:
- 观察到的21-24%增加和硫酸盐质量运输到地下水的24-25%增加.
- 污染物比标记剂检测得更早,度更高,这表明污染物丰富的孔水的流动优先.
- 在第一个事件中,持续的污染物和化物度表明了蒸发物的溶解,而第二个事件显示了持续的污染物溶解,但先前的化物冲洗.
结论:
- 瓦多斯区作为污染物的重要储,在洪水期间将它们释放到地下水中.
- 富含污染物的孔水和溶解的蒸发物在河流充电事件期间在污染物运输中发挥着关键作用.
- 模拟的洪水实验为复杂的污染物动员和运输途径提供了宝贵的见解.
相关概念视频
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
43
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
43
Conservation of Mass in Moving, Nondeforming Control Volume
1.1K
Stormwater detention basins are essential in managing runoff during heavy rainfall, particularly in urban areas where impervious surfaces increase the risk of flooding. Understanding the conservation of mass in these systems allows engineers to optimize basin performance, balancing inflow, outflow, and water storage.
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
1.1K
Responses to Drought and Flooding
10.6K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.6K
Rapidly Varying Flow
57
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
57
Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K


