Pesticides trapping performance of vegetative filter strips in black soil region, Northeast China: controlled experiments and VFSMOD-W modeling

IF 3.9 2区 环境科学与生态学 Q1 ECOLOGY
Liming Yan , Xinhong Wang , Yang Ou , Shujiang Pang , Qi Cui , Xia Hou
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引用次数: 0

Abstract

The Northeast black soil region in China is an important grain-producing area where various pesticides are extensively used to increase grain yields. However, this practice poses serious risks to the ecological health of soil and water systems, necessitating effective measures. Vegetative filter strips (VFS) are commonly used to mitigate agricultural diffuse pollutants, but their efficiency varies across different regions, requiring assessment. This study employed flume experiments, the VFSMOD-W model, and redundancy analysis (RDA) to evaluate the efficacy of VFS in runoff, sediment, and pesticide removal, as well as influencing factors. The results showed that VFS reduced outflow rate of runoff by 8 %–64 % and sediment by approximately 90 %, achieving load removal rates of 61 % and 95 % respectively. Pesticide load removal efficiency ranged from 37 % to 94 %, with higher efficiency for adsorbed pesticides like chlorpyrifos compared to water-soluble ones like atrazine. Interflow and vertical seepage were significant pathways for pesticide transport in VFS, with chlorpyrifos concentrations at 4 %–26 % and atrazine at 20 %–37 % of inflow concentrations. The VFSMOD-W model accurately predicted VFS efficiency (NSE > 0.90), and RDA results indicated that environmental factors could explain 86.7 % of the variation in VFS performance, with soil vertical saturated hydraulic conductivity (VKS) being the most influential factor, followed by rainfall intensity (T), saturated soil water content (OS), initial soil water content (OI), and filter slope for each segment (SOA). Optimizing soil moisture characteristic factors and increasing infiltration are crucial for VFS performance. Applying VFSMOD-W for precise VFS design can help reduce construction costs. In the future, long-term field monitoring and evaluation of VFS efficiency after implementation should be conducted in the black soil region of Northeast China to provide data supporting the improvement of VFSMOD-W simulation accuracy. This will also offer recommendations for the government in formulating VFS configuration schemes.

Abstract Image

中国东北黑土区植生过滤带的农药截留性能:对照试验和 VFSMOD-W 模型
中国东北黑土区是重要的粮食产区,这里广泛使用各种农药来提高粮食产量。然而,这种做法对土壤和水系的生态健康造成了严重危害,必须采取有效措施。植被过滤带(VFS)通常用于缓解农业扩散污染物,但其效率在不同地区存在差异,需要进行评估。本研究采用水槽实验、VFSMOD-W 模型和冗余分析(RDA)来评估植被过滤带在径流、沉积物和农药去除方面的功效以及影响因素。结果表明,VFS 降低了 8 %-64 % 的径流流出率和约 90 % 的沉积物流出率,负荷去除率分别达到 61 % 和 95 %。农药负荷去除率从 37% 到 94%不等,与阿特拉津等水溶性农药相比,毒死蜱等吸附性农药的去除率更高。间流和垂直渗流是 VFS 中农药迁移的重要途径,毒死蜱和阿特拉津的浓度分别为流入浓度的 4%-26% 和 20%-37%。VFSMOD-W 模型准确预测了 VFS 的效率(NSE >0.90),RDA 结果表明,环境因素可以解释 VFS 性能变化的 86.7%,其中土壤垂直饱和水力传导系数(VKS)是影响最大的因素,其次是降雨强度(T)、土壤饱和含水量(OS)、土壤初始含水量(OI)和各段过滤坡度(SOA)。优化土壤水分特征因子和增加渗透对 VFS 性能至关重要。应用 VFSMOD-W 进行精确的 VFS 设计有助于降低施工成本。未来,应在东北黑土区对 VFS 实施后的效率进行长期实地监测和评估,为提高 VFSMOD-W 模拟精度提供数据支持。这也将为政府制定 VFS 配置方案提供建议。
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来源期刊
Ecological Engineering
Ecological Engineering 环境科学-工程:环境
CiteScore
8.00
自引率
5.30%
发文量
293
审稿时长
57 days
期刊介绍: Ecological engineering has been defined as the design of ecosystems for the mutual benefit of humans and nature. The journal is meant for ecologists who, because of their research interests or occupation, are involved in designing, monitoring, or restoring ecosystems, and can serve as a bridge between ecologists and engineers. Specific topics covered in the journal include: habitat reconstruction; ecotechnology; synthetic ecology; bioengineering; restoration ecology; ecology conservation; ecosystem rehabilitation; stream and river restoration; reclamation ecology; non-renewable resource conservation. Descriptions of specific applications of ecological engineering are acceptable only when situated within context of adding novelty to current research and emphasizing ecosystem restoration. We do not accept purely descriptive reports on ecosystem structures (such as vegetation surveys), purely physical assessment of materials that can be used for ecological restoration, small-model studies carried out in the laboratory or greenhouse with artificial (waste)water or crop studies, or case studies on conventional wastewater treatment and eutrophication that do not offer an ecosystem restoration approach within the paper.
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