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首页> 外文会议>World environmental and water resources congress >STORMWATER MONITORING OF INNOVATIVE STREET RETROFITS IN URBAN WILMINGTON, NC
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STORMWATER MONITORING OF INNOVATIVE STREET RETROFITS IN URBAN WILMINGTON, NC

机译：北卡罗来纳州威尔明顿市创新街道改建物的暴风雨监测

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Many urban watersheds suffer from degraded water quality caused by stormwater runoff from rooftops, parking lots, streets and other impervious surfaces. Low Impact Development (LID) is a design approach that utilizes stormwater control measures (SCMs) to maintain and restore the natural hydrologic features of a watershed by promoting infiltration of runoff into the soil, treating runoff at its source, and minimizing impervious surface coverage. Peer-reviewed literature is lacking on the application of bioretention, permeable pavement and tree filter boxes to treat urban street runoff on a catchment-scale. A pre- and post-retrofit study has been designed to evaluate the impacts of catchment-scale retrofits on hydrology and water quality. The project will be implemented on two midblock street sections in a residential neighborhood in Wilmington, North Carolina. It includes construction of permeable pavement parking stalls, tree filter boxes and bioretention areas that extend into the street right-of-way, thereby reducing impervious surface area and increasing pedestrian safety. Runoff volumes and pollutant concentrations of bacteria, heavy metals, nutrients, polycyclic aromatic hydrocarbons (PAHs) and suspended solids were monitored from June 2011 to October 2011 at the retrofit site and an additional control site located four blocks to the West. Preliminary results from the pre-retrofit monitoring show mean concentrations of total Kjeldahl nitrogen (TKN) from the control and retrofit watersheds were 2.02 mg/L and 1.52 mg/L, respectively. Total phosphorus (TP) mean concentrations from the control and retrofit watersheds were similar at 0.31 mg/L and 0.29 mg/L, respectively. TKN and TP concentrations observed in this study at both monitoring sites were less than TKN and TP mean concentrations from National Urban Runoff Program (NURP) urban sites and NURP streets. Copper (Cu), lead (Pb) and zinc (Zn) mean concentrations from the control and retrofit watersheds were less than those reported from NURP urban sites and NURP streets. Total nitrogen (TN) and TP yearly loads were greater in the control watershed, which may be due to the greater fraction of impervious surface coverage and fertilizer use in the control watershed. The results and conclusions from this study will help refine street retrofit design standards to meet runoff volume reduction, peak discharge mitigation and water quality goals while increasing pedestrian safety and improving aesthetics in the neighborhood.
机译：由于屋顶，停车场，街道和其他不透水表面的雨水径流，许多城市流域遭受水质下降的困扰。低影响开发（LID）是一种设计方法，它利用雨水控制措施（SCM）通过促进径流渗入土壤，从源头处理径流并最小化不透水的地表覆盖来维持和恢复流域的自然水文特征。缺乏经过同行评审的文献来应用生物保留，可渗透的人行道和滤树箱来处理集水区规模的城市街道径流。改造前后的研究旨在评估流域规模改造对水文和水质的影响。该项目将在北卡罗来纳州威尔明顿的一个居民区的两个中街街道部分实施。它包括可渗透的路面停车位，树木过滤箱和生物保留区的建设，这些区域延伸到街道通行权，从而减少了不透水的表面积并提高了行人的安全性。从2011年6月至2011年10月，在改造地点和位于西部四个街区的另一个控制地点，监测了细菌，重金属，养分，多环芳烃（PAH）和悬浮固体的径流量和污染物浓度。改造前监测的初步结果显示，对照和改造分水岭的凯氏总氮（TKN）的平均浓度分别为2.02 mg / L和1.52 mg / L。对照流域和改造流域的总磷（TP）平均浓度分别相似，分别为0.31 mg / L和0.29 mg / L。在本研究中，在两个监测站点上观测到的TKN和TP浓度均低于国家城市径流计划（NURP）城市站点和NURP街道的TKN和TP平均浓度。对照流域和改造流域中的铜（Cu），铅（Pb）和锌（Zn）的平均浓度低于NURP城市站点和NURP街道的报告浓度。对照流域的总氮（TN）和总磷年负荷较高，这可能是由于对照流域的不透水地表覆盖率和肥料用量较大。这项研究的结果和结论将有助于完善街道改建设计标准，以达到减少径流量，减少洪峰排放和水质的目标，同时提高行人安全性并改善附近地区的美观性。

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