Great Bay Estuary Assessment Zones

Metadata:

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

Identification_Information:

Citation:

Citation_Information:

Originator:

NH Department of Environmental Services, Watershed Management Bureau, Water Quality Planning Section

Publication_Date: 20160819

Title: Great Bay Estuary Assessment Zones

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage:

<URL:http://www.granit.unh.edu/data/search?dset=greatbayestuaryassessmentzones_current/nh>

Description:

Abstract:

For 305(b)/303(d) water quality assessments, NHDES uses assessment units to cover the Great Bay Estuary that are coincident with the shellfish growing areas established by the NHDES Shellfish Program. Great Bay itself consists of seven different assessment units. Nitrogen and eutrophication parameters are logically evaluated utilizing data from larger aggregates of assessment units covering contiguous areas. Eutrophication effects are less localized than the bacteria pollution sources that affect shellfish harvesting. Therefore, NHDES aggregated the assessment units in the Great Bay Estuary into 27 assessment zones. The assessment zones were developed in cooperation with the PREP Technical Advisory Committee. For the Salmon Falls/Piscataqua River, the assessment zones cover both the New Hampshire and Maine sides of the main stem of the river. The river is well mixed and data from both sides of the state line are needed to provide a comprehensive dataset for assessments. However, the assessment determinations made by NHDES only apply to the New Hampshire side of the river. The Maine Department of Environmental Protection makes its own assessment determinations for the Maine side of the Salmon Falls/Piscataqua River.

Purpose:

Great Bay Estuary assessment zones used to evaluate nitrogen and eutrophication parameters for 305(b)/303(d) assessments purposes. These zones are also used by the Piscataqua Region Estuaries Partnership (PREP) for reporting eelgrass cover in their State of Our Estuaries reports.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20160819

Currentness_Reference: Publication Date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Irregular

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -70.953305

East_Bounding_Coordinate: -70.405369

North_Bounding_Coordinate: 42.8539

South_Bounding_Coordinate: 43.227938

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: eelgrass

Theme_Keyword: zones

Theme_Keyword: assessment

Place:

Place_Keyword_Thesaurus: ISO 19115 Topic Category

Place_Keyword: oceans

Place_Keyword: Northeast

Place_Keyword: New England

Place_Keyword: New Hampshire

Place_Keyword: Great Bay

Access_Constraints: None

Use_Constraints:

This data set is to be used as a primary reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, state, or local regulatory bodies are not to reassign to the New Hampshire Department of Environmental Services any authority for the decisions they make. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can cause misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated, and users are responsible for obtaining the latest version of the data

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Matt Wood

Contact_Organization: New Hampshire Department of Environmental Services

Contact_Position: Water Quality Specialist

Contact_Address:

Address_Type: Mailing and Physical Address

Address: PO Box 95, 29 Hazen Drive

City: Concord

State_or_Province: New Hampshire

Postal_Code: 03302

Contact_Electronic_Mail_Address: matthew.wood@des.nh.gov

Contact_Voice_Telephone: 603-271-8868

Data_Quality_Information:

Logical_Consistency_Report: None

Completeness_Report: See use constraints.

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

Point_and_Vector_Object_Count: 27

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: State Plane Coordinate System 1983

State_Plane_Coordinate_System:

SPCS_Zone_Identifier: 2800

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999967

Longitude_of_Central_Meridian: -71.666667

Latitude_of_Projection_Origin: 42.500000

False_Easting: 984250.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000512

Ordinate_Resolution: 0.000512

Planar_Distance_Units: survey feet

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: GreatBayEstuaryAssessmentZones_Current

Entity_Type_Definition: Great Bay Estuary Assessment Zones - Current

Entity_Type_Definition_Source: None

Attribute:

Attribute_Label: OBJECTID

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: LABEL

Attribute_Definition: Zone label

Attribute_Definition_Source: NHDES

Attribute_Domain_Values:

Unrepresentable_Domain: Text label

Attribute:

Attribute_Label: SHAPE_LENG

Attribute_Definition: Length

Attribute_Definition_Source: NHDES

Attribute_Domain_Values:

Unrepresentable_Domain: Length

Attribute:

Attribute_Label: SHAPE_AREA

Attribute_Definition: Area of feature in internal units squared.

Attribute_Definition_Source: NHDES

Attribute_Domain_Values:

Unrepresentable_Domain: Area

Metadata_Reference_Information:

Metadata_Date: 20160819

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: New Hampshire Department of Environmental Services

Contact_Person: Matt Wood

Contact_Address:

Address_Type: unknown

Address: PO Box 95, 29 Hazen Drive

City: Concord

State_or_Province: NH

Postal_Code: 03302

Contact_Voice_Telephone: (603) 271-8868

Contact_Electronic_Mail_Address: matthew.wood@des.nh.gov

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time