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Workshop: Sediment Sourcing Workshop
Monday, 24 June 2019
08:00 - 12:00
Tuscany # 6
Chair: Allen C. Gellis and Lillian Gorman Sanisca, USGS
Sediment, whether in suspension in the water column, or as deposition on a stream or lake bed, is one of the most common causes of loss of stream-biologic integrity. Sediment also reduces the capacity of our nation’s water-supply reservoirs. An important strategy in managing sediment is to determine the dominant sources and transport pathways in any given watershed. This half-day workshop will outline approaches and methods for determining sediment sources by using a sediment budget framework. We will discuss how a sediment budget is accomplished by using available tools and resources, including recent advances in multi-temporal remote sensing (lidar, structure-from-motion (SfM)). In order to conduct a sediment budget study, the sources of sediment should be clearly defined. The sediment fingerprinting approach, which identifies specific sediment sources by establishing a minimal set of physical and (or) chemical properties that uniquely characterize each source in the watershed, will be highlighted, and the steps necessary to conduct a sediment fingerprinting study will be outlined. The workshop will also instruct and demonstrate the use of the USGS Sediment Source Assessment Tool (Sed_SAT). Sed_SAT is a program written in the statistical language R (R Core Team, 2016) and utilizes a Microsoft Access® interface that allows the user to step through all the necessary analytical steps to apportion sediment. Participants are encouraged to download the program at https://my.usgs.gov/bitbucket/projects/SED/repos/sed_sat/browse, and bring their laptops to the workshop.
*Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Allen C. Gellis, U.S. Geological Survey, MD-DE-DC WSC, Baltimore, MD
Lillian Gorman Sanisaca, U.S. Geological Survey, MD-DE-DC WSC, Baltimore, MD