Map 6.2: Estimated Annual Runoff Coefficient for Typical Climatic Conditions

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Houston Engineering, Inc.

Publication_Date: June 2007

Title:

Map 6.2: Estimated Annual Runoff Coefficient for Typical Climatic Conditions

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: Watershed Management Plan

Publication_Information:

Publisher: South Washington Watershed District

Other_Citation_Details:

Publication approved September 26, 2007 and adopted November 13, 2007.

Online_Linkage:

\\MG01\msraid\01proj\4876-000_SouthWashingtonWD_PlanUpdate\GIS\data\Metadata\Map6-2_EstimatedAnnualRunoff.shp

Description:

Abstract:

This dataset presents estimated annual runoff coefficients for typical climatic conditions. The runoff coefficient values represent the annual fraction of total precipitation not retained on-site.

Generally, the dataset was derived through modeling based on land use and soil types present. A Technical Memorandum dated February 7, 2008 from Houston Engineering, Inc. to the South Washington Watershed District provides a full description of how and why the data were developed.

New developments are required to maintain the annual average predevelopment infiltration capacity of the site. The existing infiltration capacity for a specific area is primarily a function of the type of soils and amount of impervious surface. This dataset assists in quantifying existing infiltration capacity, expressed as an estimated annual runoff coefficient. The South Washington Watershed District has also developed a "Standards Manual" publication which discusses the use of this dataset in greater detail.

Purpose:

This dataset was developed in conjunction with the South Washington Watershed District Watershed Management Plan Update. Two key benefits of the file include 1) establishing a standard to enforce regulations for stormwater runoff volume control and 2) ensuring the standard incorporates variability in soils and land use across the watershed.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: February 14, 2007

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -93.022405

East_Bounding_Coordinate: -92.852716

North_Bounding_Coordinate: 44.972716

South_Bounding_Coordinate: 44.767524

Keywords:

Theme:

Theme_Keyword_Thesaurus: NA.

Theme_Keyword:

Infiltration, SWWD, South Washington, Volume Control, Standards, Watershed Management Plan

Access_Constraints: None.

Use_Constraints:

Every attempt has been made to ensure that the information contained on this map is valid at the time of publication. South Washington Watershed District and Houston Engineering, Inc. recommend consulting the data publisher for each data source to obtain more information about the data layer. Additionally, South Washington Watershed District and Houston Engineering, Inc. disclaims any and all liability for damages incurred directly or indirectly as a result of errors, omissions or discrepancies and is not responsible for misuse or misinterpretation. For the most current information contact the appropriate data source publisher.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: South Washington Watershed District

Contact_Address:

Address_Type: mailing and physical address

Address: 2302 Tower Drive

City: Woodbury

State_or_Province: MN

Postal_Code: 55125

Country: USA

Contact_Voice_Telephone: 651-714-3715

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.0.1324

Data_Quality_Information:

Lineage:

Process_Step:

Process_Description: Dataset copied.

Process_Step:

Process_Description: Dataset copied.

Source_Used_Citation_Abbreviation:

S:\4876-000_SouthWashingtonWD_PlanUpdate\GIS\data\landuse_hydrologic_group_intersect

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: G-polygon

Point_and_Vector_Object_Count: 10223

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 15

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -93.000000

Latitude_of_Projection_Origin: 0.000000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000000

Ordinate_Resolution: 0.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Map6-2_EstimatedAnnualRunoff

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: DRAINCLAS

Attribute_Definition:

Hydrologic Soil Group classification, from Washington County SSURGO.

Attribute_Definition_Source: Houston Engineering, Inc.

Attribute:

Attribute_Label: INTERSECT

Attribute_Definition:

Intersection of land use and soil (Hydrologic Soil Group) datasets.

Attribute_Definition_Source: Houston Engineering, Inc.

Attribute:

Attribute_Label: runoff_coe

Attribute_Definition:

Annual runoff coefficient. Reflects the fraction of annual precipitation that is not retained on a given polygon feature. Where Hydrologic Soil Group is potentially drained (e.g., A/D), the undrained soil condition is used for the runoff coefficient to compute the runoff coefficient. Where Hydrologic Soil Group is undefined, soil type "B" is used to compute the runoff coefficient. Land uses identified explicitly as aved surfaces or water surfaces are assigned a value of "1".

Attribute_Definition_Source: Houston Engineering, Inc.

Attribute:

Attribute_Label: LANDUSE

Attribute_Definition:

Represents the land use condition based on Metropolitan Council land use dataset for 2000. Metropolitan land use categories are aggregated consistent with methods/approach in Washington County's study "Integrating Groundwater and Surface Water Management," 2005.

Attribute_Definition_Source: Houston Engineering, Inc.

Distribution_Information:

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 5.848

Metadata_Reference_Information:

Metadata_Date: 20080728

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Houston Engineering, Inc.

Contact_Address:

Address_Type: mailing and physical address

Address: 6901 East Fish Lake Road

Address: Suite 140

City: Maple Grove

State_or_Province: MN

Postal_Code: 55369

Country: USA

Contact_Voice_Telephone: 763-493-4522

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile