Net_Water_Availability

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:

New Jersey Highlands Water Protection and Planning Council (NJ Highlands Council)

Publication_Date: 20120130

Title: Net_Water_Availability

Edition: 2.0

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: Chester, NJ

Publisher: New Jersey Highlands Council

Online_Linkage: <http://www.highlands.state.nj.us/>

Description:

Abstract:

A central goal of the Regional Master Plan is to determine the amount and type of human development and activity that the ecosystem of the Highlands Region can sustain while still maintaining the overall ecological values thereof, with special reference to surface and ground water quality and supply. Based on an analysis of available methods and available data, the Low Flow Margin method was selected as the best scientific approach available at this time for estimating capacity of ground water supplies across the entire Highlands Region, to maintain both ecological flow needs and estimate sustainable levels of human consumption. The Low Flow Margin method uses two low flow statistics, and is derived using statistical analyses of data from reference drainage basins with minimal consumptive water uses. The HUC14 subwatershed was selected as the smallest drainage area available for application of the method. The Highlands Council collaborated with the US Geological Survey, Water Resource Science Unit to develop Low Flow Margin results for each HUC14 subwatershed based on data from reference drainage basins with stream flow gaging stations to determine the Ground Water Capacity for each of the 183 HUC14 subwatersheds that occur within the Highlands Region. A key issue for water availability estimates is to what extent Ground Water Capacity should be made available for both current and future human uses. It is important to recognize that the Highlands Act emphasizes that human water uses should be constrained by ecological needs. Therefore, only a portion of Ground Water Capacity is considered available for human use, with the majority being reserved for ecosystem integrity. That amount, called Ground Water Availability, is defined as the portion of Ground Water Capacity that is available for consumptive and depletive human use without harm to ecosystems of the Highlands Region. Utilizing this method, Ground Water Availability is obtained by multiplying Ground Water Capacity by a percentage threshold, of water availability as shown below: Ground Water Availability = (Ground Water Capacity) * (% Water Availability Threshold) In the most ecologically sensitive HUC14 subwatersheds, Ground Water Availability should be severely limited to protect aquatic ecosystems and the related terrestrial ecosystems. For other HUC14s, a graduated scale is appropriately based on ecological values. HUC14s with concentrated development or agriculture and limited ecological constraints would be assigned a higher portion of Ground Water Capacity. To avoid having a highly complex system, few water availability thresholds should exist in the entire system. Implementation of the Regional Master Plan is guided by a Land Use Capability Map that identifies geographic "zones" based on a comprehensive evaluation of resource constraints and development opportunity. The Land Use Capability Map identifies those resource constrained lands where development should be limited, and as such, where it is appropriate to reserve more water for ecosystem function in order to maintain ecological value. Therefore, the thresholds established in the calculation of Ground Water Availability are determined based on the corresponding zone of the Land Use Capability Map.

Purpose:

The purpose of the Net Water Availability layer is to provide a representation of the Net Groundwater Availability in the Highlands Region by subwatershed. This anaylsis is the direct result of efforts and mandates to determine the amount and type of human development and activity that the ecosystem of the Highlands Region can sustain while still maintaining the overall ecological values thereof, with special reference to surface and ground water quality and supply.

Supplemental_Information:

Net Water Availability is estimated by subtracting from the Ground Water Availability for that subwatershed an estimate of the consumptive and depletive ground water use, and the consumptive and depletive surface water uses that are not supported by reservoir storage or safe yields. The consumptive ground water use estimates for each subwatershed are adjusted to account for the effect maximum month ground water withdrawals, multiplied by the maximum annual consumptive use coefficients. Surface water consumptive withdrawals (other than from reservoirs) have the same impact on aquatic ecosystems as the consumptive use of ground water. Unlike ground water uses, the effects are direct and immediate and so no adjustment factor is needed. Depletive effects are calculated for public supply water uses only, based on the following two assumptions: 1) Public water supply users will be connected to public wastewater sewer systems, as most commonly occurs in developed areas; this infrastructure must account for the import/export of water and wastewater within each subwatershed; 2) for uses other than public supply (e.g., irrigation, recreation), the withdrawal and the return of that water use occurs within the same subwatershed, so only consumptive effects need to be considered.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -75.210356

East_Bounding_Coordinate: -74.102732

North_Bounding_Coordinate: 41.285351

South_Bounding_Coordinate: 40.535471

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: water quantity, availability, groundwater, subwatersheds

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: New Jersey Highlands

Access_Constraints: None

Use_Constraints:

Data Distribution Agreement The Highlands Council Agrees to abide by the terms and conditions of the following: I. Description of Data to be Provided The data provided herein are distributed subject to the following conditions and restrictions: Subject Data Layers For all data contained herein, the Highlands Council makes no representations of any kind, including, but not limited to, the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the digital data layers furnished hereunder. The Highlands Council assumes no responsibility to maintain digital data layers in any manner or form. II. Terms of Agreement 1. Digital data received from the Highlands Council are to be used solely for internal purposes in the conduct of daily affairs. 2. The data are provided, as is, without warranty of any kind and the user is responsible for understanding the accuracy limitations of all digital data layers provided herein, or as documented in any accompanying Data Dictionary and Readme files. Any reproduction or manipulation of the above data must ensure that the coordinate reference system remains intact. 3. Digital data received from the Highlands Council may not be reproduced or redistributed for use by anyone without first obtaining written authorization from the Highlands Council. This clause is not intended to restrict distribution of printed mapped information produced from the digital data. 4. Any maps, publications, reports, or other documents produced as a result of this project that utilize Highlands Council digital data will credit the Highlands Council's Geographic Information System (GIS) as the source of the data with the following credit/disclaimer: "This (map/publication/report) was developed using New Jersey Highlands Water Protection and Planning Council's Geographic Information System digital data, but this secondary product has not been verified by the Highlands Council and is not state-authorized." 5. Users shall require any contractor, hired to undertake work that will utilize digital data obtained from the Highlands Council, to agree not to use, reproduce, or redistribute Highlands Council GIS data for any purpose other than the specified contractual work. All copies of Highlands Council GIS data utilized by an contractor will be required to be returned to the original user at the close of such contractual work. Users hereby agree to abide by the use and reproduction conditions specified above and agree to hold any contractor to the same terms. By using data provided herein, the user acknowledges that terms and conditions have been read and that the user is bound by these criteria.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NJ Highlands Council

Contact_Address:

Address_Type: mailing and physical

Address: 100 North Road

City: Chester

State_or_Province: New Jersey

Postal_Code: 07930

Country: US

Contact_Voice_Telephone: (908) 879-6737

Contact_Facsimile_Telephone: (908) 879-4205

Contact_Electronic_Mail_Address: gis@highlands.state.nj.us

Hours_of_Service: 9:00AM - 5:00PM

Native_Data_Set_Environment:

Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.1.3143

Data_Quality_Information:

Logical_Consistency_Report:

This is a polygon feature-based layer. Data were reviewed for correct topological structure.

Completeness_Report: Complete.

Lineage:

Process_Step:

Process_Description:

Ground Water Availability is obtained by multiplying Ground Water Capacity by a percentage threshold, of water availability as shown below: Ground Water Availability = (Ground Water Capacity) * (% Water Availability Threshold) In the most ecologically sensitive HUC14 subwatersheds, Ground Water Availability should be severely limited to protect aquatic ecosystems and the related terrestrial ecosystems. For other HUC14s, a graduated scale is appropriately based on ecological values. HUC14s with concentrated development or agriculture and limited ecological constraints would be assigned a higher portion of Ground Water Capacity. To avoid having a highly complex system, few water availability thresholds should exist in the entire system. Net Water Availability is estimated by subtracting from the Ground Water Availability for that subwatershed an estimate of the consumptive and depletive ground water use, and the consumptive and depletive surface water uses that are not supported by reservoir storage or safe yields. The consumptive ground water use estimates for each subwatershed are adjusted to account for the effect maximum month ground water withdrawals, multiplied by the maximum annual consumptive use coefficients. Surface water consumptive withdrawals (other than from reservoirs) have the same impact on aquatic ecosystems as the consumptive use of ground water. Unlike ground water uses, the effects are direct and immediate and so no adjustment factor is needed. Depletive effects are calculated for public supply water uses only, based on the following two assumptions: 1) Public water supply users will be connected to public wastewater sewer systems, as most commonly occurs in developed areas; this infrastructure must account for the import/export of water and wastewater within each subwatershed; 2) for uses other than public supply (e.g., irrigation, recreation), the withdrawal and the return of that water use occurs within the same subwatershed, so only consumptive effects need to be considered.

Process_Date: 20111001

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NJ Highlands Council

Contact_Address:

Address_Type: mailing

Address: 100 North Road

City: Chester

State_or_Province: New Jersey

Postal_Code: 07930

Country: US

Contact_Voice_Telephone: 908-879-6737

Contact_Facsimile_Telephone: 908-897-4205

Contact_Electronic_Mail_Address: gis@highlands.state.nj.us

Hours_of_Service: 8am-5pm Monday thru Friday

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: 183

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: NAD 1983 StatePlane New Jersey FIPS 2900 Feet

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9999

Longitude_of_Central_Meridian: -74.5

Latitude_of_Projection_Origin: 38.83333333333334

False_Easting: 492125.0

False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000000007285705372339636

Ordinate_Resolution: 0.000000007285705372339636

Planar_Distance_Units: foot_us

Geodetic_Model:

Horizontal_Datum_Name: D North American 1983

Ellipsoid_Name: GRS 1980

Semi-major_Axis: 6378137.0

Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Net_Water_Availability

Entity_Type_Definition: NJ Highlands Net Water Availability by HUC14

Entity_Type_Definition_Source: NJ Highlands Council

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: SW_NAME

Attribute_Definition: Subwatershed Name

Attribute_Definition_Source: NJDEP

Attribute:

Attribute_Label: OBJECTID

Attribute:

Attribute_Label: HUC14

Attribute_Definition: Hydrologic Unit Code Number

Attribute_Definition_Source: NJDEP

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: NetWtrAva

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: New Jersey Highlands Council

Contact_Address:

Address_Type: mailing and physical

Address: 100 North Road (Route 513)

City: Chester

State_or_Province: New Jersey

Postal_Code: 07930

Country: US

Contact_Voice_Telephone: 908-879-6737

Contact_Facsimile_Telephone: 908-879-4205

Contact_Electronic_Mail_Address: gis@highlands.state.nj.us

Hours_of_Service: 9:00AM - 5:00PM

Contact_Instructions:

Contact the Distributor if you have any questions or concerns regarding the distribution and/or download of this data. If you have questions or concerns regarding the data itself, please contact the Metadata Contact person listed in the Metadata Reference Section.

Distribution_Liability: See "Use Constraints"

Metadata_Reference_Information:

Metadata_Date: 20130501

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: New Jersey Highlands Council

Contact_Address:

Address_Type: mailing

Address: 100 North Road

City: Chester

State_or_Province: New Jersey

Postal_Code: 07930

Country: US

Contact_Voice_Telephone: 908-879-6737

Contact_Facsimile_Telephone: 908-879-4205

Contact_Electronic_Mail_Address: gis@highlands.state.nj.us

Hours_of_Service: 9:00AM - 5:00PM

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time