Floodplains: Difference between revisions
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{{floodplain}} | {{floodplain}}[[Category:Main Page]] | ||
'''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 [[ | '''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 critical for [[Biodiversity]] and [[Salmon]] and are also vital for [[Agriculture]]. Encroachment of residential [[Land Use]] on floodplains is a driver for [[Flood Hazard Management]]. Floodplains are generally described by [[FEMA]] mapping of flood hazard areas. The [[Floodplains by Design]] effort by [[The Nature Conservancy of Washington]] aims to provide a stronger assessment of these systems. [[Lakes]] and [[Wetlands]] are all different kinds of floodplains (where shallow [[Groundwater]] is found at or near the surface for parts of the year).''' | ||
===Physical Context=== | ===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. | [[USGS]] collaborates with [[NOAA]] to provide real-time data on river flow and flood stage. [[Mauger et al 2015]] describes the anticipated change in the flow regime under [[Climate Change]]. Rivers are flows of both water and sediment and [[Czuba et al 2011]] summarizes existing data on total sediment budget. [[Collins & Montgomery 2011]] describes a diversity of physical systems, based on how much, and how floodplains have filled since glacial excavation. | ||
Rivers are flows of both water and sediment and [[Czuba et al 2011]] summarizes existing data on total 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=== | ===Biological Context=== | ||
Besides us, [[beaver]] are key ecosystem architects, and reduction in beaver populations combined with [[flood hazard management]] | Besides us, [[beaver]] are key ecosystem architects, and the reduction in beaver populations combined with [[flood hazard management]] has radically changed floodplain ecosystems. | ||
===Planning Context=== | ===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. | 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. | ||
{{TwoColumn| | |||
== | ==Topics== | ||
The following [[topics]] are related to floodplains: < | The following [[topics]] are related to floodplains: <DPL> | ||
category=floodplain | category=floodplain | ||
category=topic | category=topic | ||
| Line 24: | Line 23: | ||
</DynamicPageList> | </DynamicPageList> | ||
== | ==Places== | ||
The following [[sites]] are in floodplains: < | The following [[sites]] are in floodplains: <DPL> | ||
category=floodplain | category=floodplain | ||
Category=Place | |||
ordermethod=sortkey | ordermethod=sortkey | ||
order=ascending | order=ascending | ||
| Line 35: | Line 33: | ||
</DynamicPageList> | </DynamicPageList> | ||
== | ==Efforts== | ||
The following [[efforts]] are being implemented by [[workgroups]] in floodplains: < | The following [[efforts]] are being implemented by [[workgroups]] in floodplains: <DPL> | ||
category=floodplain | category=floodplain | ||
category=effort | category=effort | ||
| Line 45: | Line 43: | ||
suppresserrors=true | suppresserrors=true | ||
</DynamicPageList> | </DynamicPageList> | ||
| | |||
== | ==Documents== | ||
The following | The following Documents use the Floodplain Category: | ||
< | <DPL> | ||
category=floodplain | category=floodplain | ||
category=document | category=document | ||
shownamespace=false | |||
ordermethod= | ordermethod=titlewithoutnamespace | ||
order=ascending | order=ascending | ||
mode=unordered | mode=unordered | ||
suppresserrors=true | suppresserrors=true | ||
</DPL> | |||
</ | }} | ||
Latest revision as of 15:39, 25 April 2024
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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 critical for Biodiversity and Salmon and are also vital for Agriculture. Encroachment of residential Land Use on floodplains is a driver for Flood Hazard Management. Floodplains are generally described by FEMA mapping of flood hazard areas. The Floodplains by Design effort by The Nature Conservancy of Washington aims to provide a stronger assessment of these systems. Lakes and Wetlands are all different kinds of floodplains (where shallow Groundwater is found at or near the surface for parts of the year).
Physical Context[edit]
USGS collaborates with NOAA to provide real-time data on river flow and flood stage. Mauger et al 2015 describes the anticipated change in the flow regime under Climate Change. Rivers are flows of both water and sediment and Czuba et al 2011 summarizes existing data on total 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[edit]
Besides us, beaver are key ecosystem architects, and the reduction in beaver populations combined with flood hazard management has radically changed floodplain ecosystems.
Planning Context[edit]
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.
Topics
The following topics are related to floodplains:
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