Assessing ability of a wet swale to manage road runoff：A case study in Hefei, China  

作　　者：唐宁远 李田 葛军 

机构地区：[1]State Key Laboratory of Pollution Control and Resource Reuse (Tongji University), Shanghai 200092, China [2]The New Binhu Region Construction Investment Co. Ltd, Hefei 230601, China

出　　处：《Journal of Central South University》2016年第6期1353-1362,共10页中南大学学报（英文版）

基　　金：Project(2011ZX07303-002) supported by National Water Pollution Control and Management Technology Major Projects,China

摘　　要：The ability of a wet swale,constructed in an area of poor soil permeability,to manage runoff from a roadway was monitored through 27 storm events over a period of 8 months.During the monitoring period,the wet swale reduced the total runoff volume by 50.4%through exfiltration and evapotranspiration.The wet swale significantly decreased the influent pollutant concentrations,and the effluent mean concentrations of total suspended solids,total phosphorus,chemical oxygen demand,ammonium,oxidized nitrogen,and total nitrogen in the effluent were 31 mg/L,0.10 mg/L,29 mg/L,0.52 mg/L,0.35 mg/L and1.28 mg/L,respectively.Pollutant loads were also substantially reduced from 70%to 85%.Plant uptake played an important role in nutrient removal in the wet swale.Approximately half of the nitrogen(53.8%)and phosphorus(51.5%)that entered the wet swale was incorporated in above-ground plants.It is shown that wet swales are useful for managing runoff from roads in areas of poor soil permeability.The ability of a wet swale, constructed in an area of poor soil permeability, to manage runoff from a roadway was monitored through 27 storm events over a period of 8 months. During the monitoring period, the wet swale reduced the total runoff volume by 50.4% through exfiltration and evapotranspiration. The wet swale significantly decreased the influent pollutant concentrations, and the effluent mean concentrations of total suspended solids, total phosphorus, chemical oxygen demand, ammonium, oxidized nitrogen, and total nitrogen in the effluent were 31 mg/L, 0.10 mg/L, 29 mg/L, 0.52 mg/L, 0.35 mg/L and 1.28 mg/L, respectively. Pollutant loads were also substantially reduced from 70%to 85%. Plant uptake played an important role in nutrient removal in the wet swale. Approximately half of the nitrogen （53.8%） and phosphorus （51.5%） that entered the wet swale was incorporated in above-ground plants. It is shown that wet swales are useful for managing runoff from roads in areas of poor soil permeability.

关 键 词：wet swale stormwater runoff water quality improvement water quantity reduction removal mechanism VEGETATION 

分 类 号：TU992[建筑科学—市政工程] X522[环境科学与工程—环境工程]