GIS Data Catalog

Water Quality Swale

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Summary

Linear feature, vegetated, and designed to spread water out over a large surface area.

There are also different component types of swales as well.

Description

Component Types-Basic biofiltration swale: A long, gently sloped, vegetated ditch designed to filter pollutants from stormwater.

Grass is the most common vegetation, but wetland vegetation can be used if the soil is saturated.

-Wet biofiltration swale: A variation of the basic biofiltration swale used where the longitudinal slope is slight (1 to 2 percent or less), water tables are high, or continuous low base flow is likely to result in saturated soil conditions.

Under such conditions, healthy grass growth is not possible and wetland plants are used to provide the biofiltration mechanism.-Continuous inflow biofiltration swale: A biofiltration swale where water enters the swale continuously at numerous discrete inflows with no single inflow contributing more than about 10% of total swale flow.

Layer information

Layer Name	sw_wq_swale_line
Subject Category	Utilities
Title	Water Quality Swale
Feature Count	820
Feature Type	Line
Next Update	Continually
Spatial reference	EPSG:2926
Control ID	2521
Place Keywords	Pacific NW, King County, WA, Washington State
Theme Keywords	Utility, MS4, Stormwater, Drainage, Municipal Separate Stormwater Sewer System, NPDES Municipal Stormwater Permit, Utilitiescommunication
Supplemental Information	None

Table Preview

Attribute information

OBJECTID From ESRI	Description Internal feature number. Domain Sequential unique whole numbers that are automatically generated.
Shape From ESRI	Description Feature geometry. Domain Coordinates defining the features.
DBAssetID From SOP Chapter 2: Database Design	Description DBAssetID is the unique identifier that is used to tie to Cityworks, MIS, or some other database. The DBAssetID is unique for each feature class and is generated by a script that runs nightly. Users should not modify the DBAssetID. Domain Not Found
SwaleType From SOP Chapter 2: Database Design	Description Within the Swale ComponentType, Swale Type designates the specific function and configuration of a swale. Domain Basic Biofiltration, Wet Biofiltration
Intent From SOP Chapter 2: Database Design	Description Intent tracks whether the infrastructure was designed primarily to convey stormwater or a natural water body. Domain Not Found
SwaleDepth From SOP Chapter 2: Database Design	Description The average estimated extent of a swale from top to bottom. Domain Not Found
Width From SOP Chapter 2: Database Design	Description The average estimated extent of a swale from side to side. Domain Not Found
MeasSource From SOP Chapter 2: Database Design	Description The source of the swale dimensions measurement. Domain Not Found
EngineeredLength From SOP Chapter 2: Database Design	Description EngineeredLength tracks the swale length per the design from engineered plans. Domain 0.0 to 325.0 by
Liner From King County	Description Material type of low permeability liner or treatment liner that is located underneath the swale. Domain Not Found
EngineeredWidth From SOP Chapter 2: Database Design	Description EngineeredWidth tracks the swale width per the design from engineered plans. Use the bottom width (e.g. round to 2’ for the bottom width of 2.1’ below) Domain Not Found
OwnerEntity From SOP Chapter 2: Database Design	Description OwnerEntity tracks the owner of the particular feature. Domain Airport, FMD, Private, Roads, Unknown, WLRD
Jurisdiction From SOP Chapter 2: Database Design	Description Jurisdiction tracks the jurisdiction that governs the land that the asset resides in but does not determine owership. Domain King County, Tukwila, Unknown
KingCountyMS4 No Source Noted	Description Not Found Domain Not Found
XYSource From SOP Chapter 2: Database Design	Description XYSource tracks the method in which the geographic location of the asset was recorded. Domain CAD, Picked from aerial, Plans, Sketch, Unknown
FieldVisitDate From SOP Chapter 2: Database Design	Description FieldVisitDate tracks the date that staff last visited the feature in the field. Domain Not Found
LastEditDate From SOP Chapter 2: Database Design	Description LastEditDate tracks the date that staff last edited the feature. Domain Not Found
DataStage From King County	Description DataStage tracks the status of the data as it moves through the QAQC process. Domain Acquire - Asset still needs to be verfied Process - Asset has been verfied and needs to go through the QC process
CurrentStatus From King County	Description CurrentStatus tracks the status of the data as it moves through the lifecycle of an asset. Domain Active
DataSource From King County	Description DataSource tracks the group, program, or process that added the data. Domain Not Found
FacilityID From WLRD SWSS	Description FacilityID tracks the FacilityID number that the feature is a part of. Domain Not Found
PlanLink From WLRD SWSS	Description When digital plans are available, PlanLink provides a hyperlink to plan files. Domain Not Found
GlobalID From ESRI	Description GlobalID is a 36 character string that ArcGIS uses to uniquely identify features or table rows within a geodatabase and across geodatabases. Domain Not Found
AssetID From King County	Description An ObjectID is a unique, not null integer field used to uniquely identify rows in tables in a geodatabase. The values in this field are maintained by ArcGIS. The ObjectID is used by ArcGIS to do such things as scroll, display selection sets, and perform identify operations on features. Domain Not Found
PAA From SOP Chapter 2: Database Design	Description PAA tracks which Potential Annexation Area an asset intersects, if applicable. Domain Not Found
Shape.STLength() From ESRI	Description Shape is used by ArcGIS to store the geometry of a feature. Domain Not Found

Contact information

Maintained by	DNRP - Water and Land Resources
Primary	Harkeerat Kang Harkeerat.Kang@kingcounty.gov

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