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This project aimed to develop a consistent and comprehensive spatial database of tidal restriction features (e.g., culverts, tide gates, levees, and dikes), and current and potential tidal wetland habitat extents for Puget Sound’s major large river deltas. Although numerous spatial datasets for tidal restriction and wetland habitat currently exist, these have not been synthesized into a consistent regional dataset. In addition, many datasets are incomplete or have become outdated. Regional datasets were compiled into a consistent spatial database and remote sensing was used to update and correct regional data, digitize missing features, and classify feature types and potential connectivity impacts. The resulting spatial database was used to delineate current and potential tidal wetland habitat extents and integrate tidal restriction information. The products of this project are directly supporting salmon recovery planning and evaluation in the Puget Sound region (e.g., ESRP’s River Deltas Learning Objectives, PSP’s Estuaries Vital Sign and Common Chinook Indicators, NOAA’s Salmon Habitat Status and Trends Monitoring Program, and WDFW’s intertidal fish passage assessments) by providing spatial data that can be used to identify and evaluate restoration opportunities, inform development and evaluation of recovery targets at regional and system scales, and identify data gaps to guide future research needs. |
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This project aimed to develop a consistent and comprehensive spatial database of tidal restriction features (e.g., culverts, tide gates, levees, and dikes), and current and potential tidal wetland habitat extents for Puget Sound’s major large river deltas. Although numerous spatial datasets for tidal restriction and wetland habitat currently exist, these have not been synthesized into a consistent regional dataset. In addition, many datasets are incomplete or have become outdated. Regional datasets were compiled into a consistent spatial database and remote sensing was used to update and correct regional data, digitize missing features, and classify feature types and potential connectivity impacts. The resulting spatial database was used to delineate current and potential tidal wetland habitat extents and integrate tidal restriction information. The products of this project are directly supporting salmon recovery planning and evaluation in the Puget Sound region (e.g., ESRP’s River Deltas Learning Objectives, PSP’s Estuaries Vital Sign and Common Chinook Indicators, NOAA’s Salmon Habitat Status and Trends Monitoring Program, and WDFW’s intertidal fish passage assessments) by providing spatial data that can be used to identify and evaluate restoration opportunities, inform development and evaluation of recovery targets at regional and system scales, and identify data gaps to guide future research needs. |
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The Tidal Restriction layer represents the network and connectivity impacts of tidal restrictions in the Puget Sound Large River Deltas created using regional data, remotely sensed aerial imagery, and oblique shoreline imagery depicted as polylines. The CFS Tidal Restriction network is represented by polylines digitized at a 1:1000 scale using regional data, remote sensed aerial imagery (Hexagon Imagery Program 0.3 m 4-band aerial imagery collected during summer leaf on conditions from August to September in 2017), and oblique shoreline imagery (DOE). Features were classified in a two-tiered nested structure that included a primary structure type and water crossing structure type (where applicable). Where features were not present in the regional data, aerial imagery was used to determine the feature type for primary and water crossing structures, or the feature was called Unknown. This database also contains details on feature type (e.g., road, dike/levee, culvert, bridge), status (e.g., present, removed, abandoned, breached), feature existence certainty, tidal connectivity impacts and certainty, fish passage and fishways, physical feature attributes (e.g., lengths, widths, elevations), feature installation and modifications, and review status, as well as whether the feature was copied from a regional data layer or identified using remotely sensed aerial imagery. These classifications were assigned using the regional data and aerial imagery and rely on CFS staff interpretation and pre-determined classification rules for connectivity and feature type assignments where regional data were lacking. |
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Large River Deltas Tidal Restrictions |
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["Puget Sound","Large River Deltas","ESRP","CFS","Tidal Restrictions"] |
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en-US |
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