Study on urban open channel cross-sectional overcurrent under composite ecological floating bed layout

IF 3.9 2区环境科学与生态学 Q1 ECOLOGY

Ecological Engineering Pub Date : 2025-04-12 DOI:10.1016/j.ecoleng.2025.107636

Yanan Qiao , Chao Ma , Jijian Lian , Kui Xu , Zhanfeng Qi , Ye Yao

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引用次数: 0

Abstract

The composite ecological floating bed was a commonly used in-situ treatment technology for the remediation and purification of polluted water bodies. The plant root system on the floating bed was the main area for the absorption and degradation of pollutants in the water, and its hindering effect made the flow rate of the water flow into the area when the flow rate was drastically reduced, and part of the water flow would leave the root zone from the side or the bottom, which would affect the purification effect. Therefore, it was vital to clarify the overflow situation of the river cross-section under the effect of ecological floating bed. In this paper, on the basis of physical model tests, the lateral distribution characteristics of flow velocity in the open channel of composite ecological floating beds under different aeration and flooding ratios were investigated, and the lateral partitioning of the time-averaged flow velocity and its diversion law were revealed. This study could further quantify the lateral outflow percentage and bottom outflow percentage of the root zone of the floating beds, which could provide theoretical guidance and support for the selection and layout of the ecological floating beds in the field in the future.

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复合生态浮床布置下城市明渠断面过流研究

复合生态浮床是一种常用的污染水体修复和净化原位处理技术。浮床上的植物根系是吸收和降解水中污染物的主要区域，其阻碍作用使得水流流速急剧下降时，部分水流会从侧面或底部流出根系区，影响净化效果。因此，厘清生态浮床作用下河流断面的溢流情况至关重要。本文在物理模型试验的基础上，研究了不同曝气比和淹没比下复合生态浮床明渠流速的横向分布特征，揭示了时均流速的横向分区及其分流规律。该研究可进一步量化浮床根区的侧向出流率和底部出流率，为今后野外生态浮床的选型和布局提供理论指导和支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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.