Beaches: Difference between revisions

From Salish Sea Wiki
mNo edit summary
mNo edit summary
(5 intermediate revisions by the same user not shown)
Line 2: Line 2:
[[File:Feeder bluff.jpg|left|300px|border]]
[[File:Feeder bluff.jpg|left|300px|border]]
'''Beaches dominate much of Puget Sound’s shoreline. They are characterized by the active transport of sediment by wave action. They can be divided into those associated with coastal bluffs, where the coastline has retreated landward, and those associated with barrier beaches, where sediment has been deposited seaward of the original coastline. Barriers are numerous and include spits, tombolos, cuspate forelands and a variety of other forms. Most Puget Sound beaches (other than the pocket beaches along rocky coasts) exhibit net longshore transport of sediment and the development of discrete littoral drift cells, within which sources and sinks for sediment and a direction of net transport can be defined. (from [[Shipman 2008]])'''
'''Beaches dominate much of Puget Sound’s shoreline. They are characterized by the active transport of sediment by wave action. They can be divided into those associated with coastal bluffs, where the coastline has retreated landward, and those associated with barrier beaches, where sediment has been deposited seaward of the original coastline. Barriers are numerous and include spits, tombolos, cuspate forelands and a variety of other forms. Most Puget Sound beaches (other than the pocket beaches along rocky coasts) exhibit net longshore transport of sediment and the development of discrete littoral drift cells, within which sources and sinks for sediment and a direction of net transport can be defined. (from [[Shipman 2008]])'''
'''Beaches are organized into sites based on the extent ''littoral drift cells''.  The 2500 miles of Puget Sound shoreline has been divided into 744 distinct littoral cells where the presence of [[bluff-backed beach]] indicates the likely presence of sediment input and transport along retreating coastal bluffs ([[Cereghino et al 2012]]).'''
'''Beaches are organized into sites based on the extent ''littoral drift cells''.  The 2500 miles of Puget Sound shoreline has been divided into 744 distinct littoral cells where the presence of [[bluff-backed beach]] indicates the likely presence of sediment input and transport along retreating coastal bluffs ([[Cereghino et al 2012]]).'''


Line 9: Line 10:
*A variety of [[Nearshore Salmon Recovery Planning]] efforts have considered salmon use of beaches.
*A variety of [[Nearshore Salmon Recovery Planning]] efforts have considered salmon use of beaches.
*The [[ShoreZone Geodatabase]] provides a range of information about beach conditions beyond that provided by the [[PSNERP geodatabase]] including biological data.
*The [[ShoreZone Geodatabase]] provides a range of information about beach conditions beyond that provided by the [[PSNERP geodatabase]] including biological data.
*George Kaminsky at [[Washington State Department of Ecology]] is completing innovative boat-based LIDaR mapping of beach profile as part of a [[Mapping Bluff and Beach Change]] effort.
*George Kaminsky at [[Washington State Department of Ecology]] is completing innovative boat-based LIDAR mapping of beach profile as part of a [[Mapping Bluff and Beach Change]] effort.
*The [[US Army Corps of Engineers]] has jurisdiction over beach modification, and regulates construction below ''ordinary high water'' in Puget Sound.  [[NOAA]] has recommended regulation from Highest Astronomical Tide (HAT).
*The [[US Army Corps of Engineers]] has jurisdiction over beach modification, and regulates construction below ''ordinary high water'' in Puget Sound.  [[NOAA]] has recommended regulation from Highest Astronomical Tide (HAT).
*The [[Shoreline Master Program]] managed by [[WDOE]] requires [[jurisdictions]] to develop shoreline management plans that include protection and restoration strategies, and mandates "no net loss of shoreline ecological functions".
*The [[Shoreline Master Program]] managed by [[WDOE]] requires [[jurisdictions]] to develop shoreline management plans that include protection and restoration strategies, and mandates "no net loss of shoreline ecological functions".
*There are limited data to describe natural rates of bluff erosion.  The [[Measuring Coastal Bluff Recession Rates Throughout the Puget Sound Region]] effort by [[Coastal Geologic Services]] uses aerial photography.
*There are limited data to describe natural rates of bluff erosion, and the relationship between sediment supply and beach structure.  The [[Measuring Coastal Bluff Recession Rates Throughout the Puget Sound Region]] effort by [[Coastal Geologic Services]] uses the aerial photograph record to estimate beach recession rate.
*Megan Dethier is noteworthy as a long time regional research scientist that has been studying [[Effects of bulkhead removal on beaches and their biota]] and [[Dethier 1990]] remains a seminal work in linking beach structure to biotic communities, and is used in the [[ShoreZone Geodatabase]].
*The [[ESRP]] program provides grants for beach protection and restoration.
*The [[ESRP]] program provides grants for beach protection and restoration.
*[[Marine Resource Committees]] provide a unique advisory function on coastal issues to Northern Puget Sound [[Counties]], with support from the [[Northwest Straits Commission]].
*[[Marine Resource Committees]] provide a unique advisory function on coastal issues to Northern Puget Sound [[Counties]], with support from the [[Northwest Straits Commission]].


==Beach [[Topics]]==
==Beach [[Topics]]==
The following pages summarize topics associated with beaches.  A topic page encompasses a body of knowledge and referenced several efforts and documents.
{|
{|
|style="width:50%;vertical-align:top;"|
|style="width:50%;vertical-align:top;"|
Line 58: Line 61:
|-
|-
|style="width:50%;vertical-align:top;"|
|style="width:50%;vertical-align:top;"|
==Beach Restoration==
==Beach Restoration [[Efforts]]==
<DynamicPageList>
<DynamicPageList>
category=beach
category=beach
Line 97: Line 100:
category=beach
category=beach
category=document
category=document
shownamespace=false
namespace=file
namespace=file
ordermethod=sortkey
ordermethod=sortkey

Revision as of 16:38, 19 April 2021


Beach Icon.jpg

Beaches

Beaches form where wave action erodes shorelines creating an intertidal bench of mobile sediment
Wiki Rules
  • Wiki text does not reflect the policy or opinion of any agency or organization
  • Please adhere to our social contract
  • Complain here, and be nice.


Link to List of Workgroups Link to List of Topics Link to List of Places

Link to List of Efforts Link to List of Products Link to List of Documents Link to List of Graphics Link to List of Websites

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

Feeder bluff.jpg

Beaches dominate much of Puget Sound’s shoreline. They are characterized by the active transport of sediment by wave action. They can be divided into those associated with coastal bluffs, where the coastline has retreated landward, and those associated with barrier beaches, where sediment has been deposited seaward of the original coastline. Barriers are numerous and include spits, tombolos, cuspate forelands and a variety of other forms. Most Puget Sound beaches (other than the pocket beaches along rocky coasts) exhibit net longshore transport of sediment and the development of discrete littoral drift cells, within which sources and sinks for sediment and a direction of net transport can be defined. (from Shipman 2008)

Beaches are organized into sites based on the extent littoral drift cells. The 2500 miles of Puget Sound shoreline has been divided into 744 distinct littoral cells where the presence of bluff-backed beach indicates the likely presence of sediment input and transport along retreating coastal bluffs (Cereghino et al 2012).

Littoral drift cells are units of beach that include a source of sediment, conveyance of sediment along the shoreline, and a sink for sediment, either at a convergence zone where two drift cells merge, or offshore below the depth of wave action. Shipman 2008 differentiates between beach systems with littoral drift, and pocket beaches where sediment is relatively contained.

Notes

Beach Topics

The following pages summarize topics associated with beaches. A topic page encompasses a body of knowledge and referenced several efforts and documents.

Core Beach Topics:

Other Beach topics:

Beach Sites and Places

The following sites are in beaches:


Beach Restoration Efforts

Other Beach Efforts

Beach Documents

The following pages cite documents about beaches:

The following beach documents are uploaded to this wiki: