Polonium-210 and Pb-210 were measured in surficial benthic sediments and particulate matter collected in sediment traps deployed at five different locations in the Clinton River, a dynamic system, in Lake St. Clair in Southeast Michigan to quantify the sediment resuspension rates and determine the particle residence time. The mean ²¹⁰Po_xs/²¹⁰Pb_xs activity ratio of suspended trap and surficial bottom sediments were 0.72 ± 0.12 (n = 16, range: 0.42–0.89) and 0.79 ± 0.15 (n = 15, range: 0.40–1.00) indicating that a major fraction of trapped material is from resuspended bottom sediments. Sediment resuspension rate calculated using a single box model approach yielded a resuspension rate of 0.1–1.0 g cm⁻² yr⁻¹ using ²¹⁰Po and 0.2–1.4 g cm⁻² yr⁻¹using ²¹⁰Pb. Particle residence time varied from 0.3 to 3.9 days using ²¹⁰Pb and 0.9–13.4 days for ²¹⁰Po. This present study indicates that sediment resuspension is considerably high in Clinton River and thus any decision on remedial action towards the restoration such as dredging, natural attenuation is challenging. This present study has direct relevance to the transport and resuspension of other sulfur group elements (Se, O, etc) and lithogenic elements (e.g., Th).

在密歇根州东南部圣克莱尔湖动态系统克林顿河的五个不同位置部署的沉积物捕集阱中，测量了表层底栖沉积物和沉积物中收集的颗粒物中的--210和铅-物质，以量化沉积物的再悬浮率并确定粒子停留时间。悬浮阱和表层底部沉积物的平均²¹⁰ Po _xs / ²¹⁰ Pb _xs活度比分别为0.72±0.12（n = 16，范围：0.42–0.89）和0.79±0.15（n = 15，范围：0.40–1.00）被困物质的很大一部分来自重悬的底部沉积物。使用单箱模型方法计算的泥沙重悬速率得出的重悬速率为0.1–1.0 g cm ^-2 yr^-1使用²¹⁰宝和0.2-1.4克厘米^-2年^-1使用²¹⁰ Pb等。使用²¹⁰ Pb的粒子停留时间从0.3到3.9天不等，而对于²¹⁰ Po的粒子停留时间从0.9到13.4天不等。本研究表明，克林顿河中的沉积物重悬量很高，因此，任何有关恢复的补救措施的决定（例如疏ging，自然衰减）都具有挑战性。本研究与其他硫族元素（Se，O等）和成岩元素（例如Th）的运输和重悬浮直接相关。