Rehabilitation of the Middle Rio Grande near Bernalillo, New Mexico
Publication: World Environmental and Water Resources Congress 2009: Great Rivers
Abstract
Along the Middle Rio Grande near Bernalillo, New Mexico, sediment loads and flood peaks have been reduced, and the river channel is incising and has converted from a low flow braided sand-bedded channel to a single thread gravel-controlled bed channel (often bi-modal sediment transport conditions), with a slightly sinuous planform. As a result, the river has migrated laterally, and before the project, was closer to the levee that provides flood protection for the adjacent developed areas. A project has been implemented to prevent levee failure, safely pass peak flows, re-establish some measure of floodplain connectivity, and improve habitat conditions for two endangered species. Project features include a new channel relocated away from the levee, bendway weirs, a low floodplain surface along the outside of the new river bend, a secondary channel, rootwads, and native vegetation plantings. The new low floodplain surface is intended to provide a new riparian zone near the existing riparian zone that has become decadent as a result of channel incision and reduced flood peaks. Data include post project cross sections showing the re-connected floodplain and the initial riparian zone re-establishment, and main channel and near bank vertical velocity profiles. Initial channel response is qualitatively evaluated.
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Copyright
© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Buildings
- Channel bends
- Channel stabilization
- Channels (waterway)
- Construction engineering
- Construction management
- Construction methods
- Floods
- High-rise buildings
- Hydraulic engineering
- Hydraulic structures
- Levees and dikes
- Project management
- Rehabilitation
- Structural engineering
- Structures (by type)
- Water and water resources
- Waterways
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