Trace Metals and Fluvial Response Rates

拟议研究的总体目标是利用从已知历史年代的点来源获得的铅和锌痕量金属，以量化和模拟洪水的侵蚀和沉积影响以及沉积物和痕量金属的长期下游输送。这项研究解决了一个长期存在的问题，即以前几乎没有定量数据来记录不同时间尺度和地理位置的排水系统中泥沙储存的敏感性。拟议的研究将量化描述不同时间尺度和洪水事件下泥沙移动和储存的响应速度和过程。对研究区滩涂沉积物中铅、锌金属长期去向的模拟和量化结果，可作为进一步了解与输水沉积物有关的多种有毒物质的长期行为的通用模型。

The general objective of the proposed research is to use lead and zinc trace metals derived form point sources of known historical ages to quantify and model erosional and depositional effects of floods and the long-term downstream transport of sediment and trace metals. The research addresses the long-standing problem that little previous quantitative data has been available to document the sensitivity of sediment storage at various time scales and geographic locations in drainage systems. The proposed research will quantify response rates and processes that describe the movement and storage of sediment under varying time scales and flood events. Results from the modeling and quantification of the long-term fate of lead and zinc metals in floodplain sediment of the study area should serve as a general model to further understand the long-term behavior of many toxic substances that are associated with water transported sediment.