Wei Zhang, Simin Li, Fengbing Tang
School of Urban Construction, Hebei University of Engineering, Handan, Hebei 056038, China.
ScientificWorldJournal. 2013 Jul 11;2013:964737. doi: 10.1155/2013/964737. Print 2013.
To develop urban stormwater management effectively, characterization of urban runoff pollution between dissolved and particulate phases was studied by 12 rainfall events monitored for five typical urban catchments. The average event mean concentration (AEMC) of runoff pollutants in different phases was evaluated. The AEMC values of runoff pollutants in different phases from urban roads were higher than the ones from urban roofs. The proportions of total dissolved solids, total dissolved nitrogen, and total dissolved phosphorus in total ones for all the catchments were 26.19%-30.91%, 83.29%-90.51%, and 61.54-68.09%, respectively. During rainfall events, the pollutant concentration at the initial stage of rainfall was high and then sharply decreased to a low value. Affected by catchments characterization and rainfall distribution, the highest concentration of road pollutants might appear in the later period of rainfall. Strong correlations were also found among runoffs pollutants in different phases. Total suspended solid could be considered as a surrogate for particulate matters in both road and roof runoff, while dissolved chemical oxygen demand could be regarded as a surrogate for dissolved matters in roof runoff.
为有效开展城市雨水管理，通过对五个典型城市集水区监测的12场降雨事件，研究了城市径流污染在溶解相和颗粒相之间的特征。评估了不同相径流污染物的平均事件平均浓度（AEMC）。城市道路不同相径流污染物的AEMC值高于城市屋顶的。所有集水区中总溶解固体、总溶解氮和总溶解磷在总量中的比例分别为26.19%-30.91%、83.29%-90.51%和61.54%-68.09%。降雨事件期间，降雨初期污染物浓度较高，随后急剧下降至低值。受集水区特征和降雨分布的影响，道路污染物的最高浓度可能出现在降雨后期。不同相径流污染物之间也发现有很强的相关性。总悬浮固体可被视为道路和屋顶径流中颗粒物的替代物，而溶解化学需氧量可被视为屋顶径流中溶解物的替代物。
