Trace Metals and Fluvial Response Rates

拟议研究的总体目标是利用从已知历史时代的点源中提取的铅和锌微量金属来量化和模拟洪水的侵蚀和沉积效应以及沉积物和微量金属的长期下游运输。该研究解决了一个长期存在的问题，即以前很少有定量数据可用于记录排水系统中不同时间尺度和地理位置的沉积物储存的敏感性。拟议的研究将量化在不同时间尺度和洪水事件下描述沉积物运动和储存的响应率和过程。模拟和量化研究区洪泛区沉积物中铅和锌金属的长期命运的结果，应作为进一步了解与水运沉积物相关的许多有毒物质的长期行为的一般模型。

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.