HR: 13:40h
AN: H33J-01 INVITED    [Abstracts]
TI: Closing the Gap Between Sediment Budgeting and Stream Restoration Planning
AU: * Smith, S M
EM: ssmith@dnr.state.md.us
AF: The Johns Hopkins University, Dept. of Geography and Environmental Engineering 3400 N. Charles Street, Baltimore, MD 21218, United States
AU: * Smith, S M
EM: ssmith@dnr.state.md.us
AF: Maryland Department of Natural Resources, Watershed Services, Annapolis, MD 21401, United States
AB: A wooden boat builder will tell you that the majority of a project work load is often associated with the setup and preparation. The same reality applies to stream restoration intended to achieve watershed sediment yield reductions, with project site selections comprising a substantial share of the activities necessary to achieve long- term basin-wide objectives. Sediment budgeting strategies that have been long standing pursuits of the geomorphology community can directly and indirectly provide support to a framework for stream restoration targeting and benefit assessment. A level of detail suitable to support decisions for the prioritization of stream restoration investments in either headwater or lower alluvial valley reaches can be attained using a suite of data from small pond and reservoir sedimentation assessments, short-term storm sampling, drainage network measurements, and rainfall-runoff modeling. Analyses of hydrograph sediment concentration trends, watershed flow patterns, and channel adjustment mechanics that provide the details necessary for defensible sediment supply and delivery estimates can also guide the selection of strategies to alter them. Examples will be provided from an investigation of first-order watershed sediment production in the Piedmont region of Maryland (USA) to illustrate how stream restoration site targeting and design concepts can be derived from spatially scaled watershed sediment budgeting exercises.
DE: 1815 Erosion
DE: 1825 Geomorphology: fluvial (1625)
DE: 1834 Human impacts
DE: 1856 River channels (0483, 0744)
SC: Hydrology [H]
MN: 2007 Fall Meeting