Exposed soils associated with active construction sites provide opportunities for erosion and sediment transport during storm events, introducing risks associated with excess sediment to downstream infrastructure and aquatic biota. A better understanding of the drivers of sediment transport in construction site runoff is needed to improve the design and performance of erosion and sediment control measures (ESCMs). Eleven monitoring locations on 3 active road construction sites in central Ohio were established to characterize runoff quality from points of concentrated flow during storm events. Grab samples were analyzed for total suspended solids (TSS), turbidity, and particle size distribution (PSD). Median TSS concentrations and turbidity levels across all samples were 626 mg/L (range 25–28,600 mg/L) and 759 NTU (range 22–33,000 NTU), respectively. The median PSD corresponded to a silty clay loam, mirroring the soil texture of much of Ohio’s subsoils. TSS concentrations and turbidity were significantly positively correlated with the rainfall intensity 10 min prior to sample collection, suggesting that higher flow rates created greater shear stress on bare soil which resulted in more erosion. Conversely, rainfall duration was negatively correlated with particle size, indicating that prolonged moisture from rainfall promoted the dispersion of soil aggregates which mobilized smaller particles. Multivariable linear regression models revealed that higher rainfall intensities corresponded to higher turbidity values, while higher TSS concentrations were associated with higher rainfall intensities, depths, and durations. Results from this study highlight the importance of reducing raindrop impact and subsequent shear stress applied by concentrated flows through the use of ESCMs to limit sediment export from construction sites.

与活跃的建筑工地相关的裸露土壤在风暴事件期间提供了侵蚀和沉积物运输的机会，从而给下游基础设施和水生生物群带来了与过量沉积物相关的风险。需要更好地了解建筑工地径流中泥沙输送的驱动因素，以改进侵蚀和泥沙控制措施​​ (ESCM) 的设计和性能。在俄亥俄州中部 3 个活跃的道路施工现场建立了 11 个监测点，以表征风暴事件期间集中流量点的径流质量。对抓取样品进行总悬浮固体 (TSS)、浊度和粒度分布 (PSD) 分析。所有样品的中位 TSS 浓度和浊度水平分别为 626 mg/L（范围 25-28,600 mg/L）和 759 NTU（范围 22-33,000 NTU）。 PSD 中值对应于粉质粘壤土，反映了俄亥俄州大部分底土的土壤质地。 TSS 浓度和浊度与样品采集前 10 分钟的降雨强度呈显着正相关，这表明较高的流速会对裸露土壤产生更大的剪切应力，从而导致更多的侵蚀。相反，降雨持续时间与颗粒大小呈负相关，这表明降雨的持续湿润促进了土壤团聚体的分散，从而动员了较小的颗粒。多变量线性回归模型显示，较高的降雨强度对应于较高的浊度值，而较高的 TSS 浓度则与较高的降雨强度、深度和持续时间相关。这项研究的结果强调了通过使用 ESCM 限制建筑工地沉积物输出来减少雨滴影响和随后由集中水流施加的剪切应力的重要性。