Difference between revisions of "Floodplains"

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'''Floodplains form where rivers flow through a valley of alluvial sediment several times the width of the channel.  During floods, the river inundates the floodplain depositing sediments.  Floodplains and their rivers are fed by both [[headwaters]] and [[lowland watersheds]], and flow into [[river deltas]] as they enter the sea.  Floodplains are generally described by [[FEMA]] mapping of flood hazard areas.  The [[Floodplains by Design]] effort by [[The Nature Conservancy of Washington]] is anticipated to provide a stronger assessment of these systems.
 
'''Floodplains form where rivers flow through a valley of alluvial sediment several times the width of the channel.  During floods, the river inundates the floodplain depositing sediments.  Floodplains and their rivers are fed by both [[headwaters]] and [[lowland watersheds]], and flow into [[river deltas]] as they enter the sea.  Floodplains are generally described by [[FEMA]] mapping of flood hazard areas.  The [[Floodplains by Design]] effort by [[The Nature Conservancy of Washington]] is anticipated to provide a stronger assessment of these systems.
  

Latest revision as of 16:22, 6 November 2017


Floodplain Icon.jpg

Floodplain

Floodplains occur where large rivers and streams meander in their own sediments

Salish Sea References

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Link to List of Workgroups Link to List of Efforts Link to List of Resources Link to List of Documents Link to List of Topics Link to List of Places

Link to Headwater Sites Link to Lowland Watershed Sites Link to Floodplain Sites Link to Delta Sites Link to Embayment Sites Link to Beach Sites Link to Rocky Headland Sites

Floodplains form where rivers flow through a valley of alluvial sedimentparticles of clay, silt, sand, gravel, or cobble, transported by water, are called sediment. several times the width of the channel. During floods, the river inundates the floodplain depositing sediments. Floodplains and their rivers are fed by both headwaters and lowland watersheds, and flow into river deltas as they enter the sea. Floodplains are generally described by FEMA mapping of flood hazard areas. The Floodplains by Design effort by The Nature Conservancy of Washington is anticipated to provide a stronger assessment of these systems.

Physical Context

USGS collaborates with NOAA to provide real-time data on river flow and flood stage. Mauger et al 2015 describes anticipated change in flow regime. Rivers are flows of both water and sedimentparticles of clay, silt, sand, gravel, or cobble, transported by water, are called sediment. and Czuba et al 2011 summarizes existing data on total sedimentparticles of clay, silt, sand, gravel, or cobble, transported by water, are called sediment. budget. Collins & Montgomery 2011 describes a diversity of physical systems, based on how much, and how floodplains have filled since glacial excavation.

Biological Context

Besides us, beaver are key ecosystem architects, and reduction in beaver populations combined with flood hazard management have radically changed floodplain ecosystems.

Planning Context

Because of our dry-summer climate, moist rich floodplain soils are vital to agriculture. The Puget Sound Partnership has adopted a floodplain restoration target as part of Puget Sound Vital Signs. Floodplains by Design has promoted multi-benefit restoration strategies, with novel efforts in the Puyallup/White. Snohomish, Stillaguamish, Skagit, Nooksack, Dungeness and Skokomish basins. Floodplain habitats. The Puget Sound Watershed Characterization identified a unique set of floodplain attributes because of wetlands, including those created by beaver, re-affirming the importance of floodplains already described in salmon recovery planning, particularly for endangered Puget Sound Chinook Salmon. A constellation of authorities and agencies in Flood Hazard Management systems are focused on floodplain dynamics.


Floodplain Topics

The following topics are related to floodplains:

Floodplain Sites and Places

The following sites are in floodplains:

Floodplain Efforts

The following efforts are being implemented by workgroups in floodplains:

Floodplain Documents

The following pages cite documents about floodplains:


The following floodplain documents are uploaded to this wiki:

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