植草沟控制城市径流污染研究进展

Advance on grass swale to control urban runoff pollution

综合分析了植草沟的利用现状、水力效应、植草沟水质处理效果及机理。植草沟能一定程度削减雨水径流量,降低径流中总悬浮固体(TSS)、重金属、有机污染物等浓度。植草沟主要通过沉淀、过滤、吸附、离子交换、植物吸收和生物降解等作用去除污染物。影响污染物去除及径流量削减的因素包括植草沟长度和纵向坡度、植物种类和水力因素等。指出了目前关于植草沟研究中存在的不足,并对该技术的进一步研究与应用提出了展望。

The function and structure of vegetation gully,hydraulic effect,pollutant removal effect and influencing factors were analyzed.Planting gulch can reduce the runoff of rainwater to a certain extent and reduce the concentration of total suspended solids(TSS),heavy metals and organic pollutants in runoff.The grass swale mainly removes pollutants through precipitation,filtration,adsorption,ion exchange,plant absorption and biodegradation.Factors affecting pollutant removal and runoff reduction include length and longitudinal slope of gullies,plant species and hydraulic factors.This paper points out the shortcomings of the current research on herbage ditch and puts forward the prospect of further research and application of this technology.