A recirculating flume is being used to investigate fine sediment transport in a controlled, easily observable environment. Once the basic effect of high sediment loadings is understood and modeled, one or more field sites will be established to observe this process in the environment. The dynamics of a single reach will be considered. The successful development and application of the model will provide a tool to analyze the impact of high sediment loadings on streams. The model could be used to develop guidelines for acceptable sediment loadings, to indicate the possible benefits of various erosion control measures, or to evaluate the recovery potential of sediment-laden streams.
Many factors drive drinking water utilities to consider changes in coagulation schemes.
These include regulations, economics, and water quality goals, among others. Changing primary coagulants requires careful planning, implementation, and assessment to produce the anticipated results. Adequate planning minimizes the chances of unanticipated effects on plant performance and facilities operations and provides contingency measures when unfavorable consequences occur. This project relies on wide participation by stakeholders, including water utilities, coagulant vendors, consultants, and regulators. The end result will be a guidance manual that will serve as a reference to utilities and consultants for planning, implementing, and assessing coagulant changes.