Sea Level Rise - New Hampshire Open Coast, Piscataqua River, and Great Bay

Identification_Information:

Citation:

Citation_Information:

Originator: Earth Systems Research Center, University of New Hampshire
Publication_Date: 20230410
Title:

Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:

Publication_Place: Durham, New Hampshire
Publisher: Earth Systems Research Center, University of New Hampshire

Other_Citation_Details: None
Online_Linkage:

https://ftp.granit.unh.edu/GRANIT_Data/Vector_Data/Oceans_and_Coasts/d-sealevelrise_2ft_scenarios

Larger_Work_Citation:

Citation_Information:

Originator: Earth Systems Research Center, University of New Hampshire
Publication_Date: 19860101
Title: NH GRANIT Database
Publication_Information:

Publication_Place: Durham, New Hampshire
Publisher: Earth Systems Research Center, University of New Hampshire

Online_Linkage: https://granit.unh.edu

Description:

Abstract:

The database contains predicted sea level rise extent layers and baseline layers for the open coast of New Hampshire, the Piscataqua River, and Great Bay and comprise the following eleven scenarios:

p_MHHW_1_foot_slr: Mean higher high water + 1' sea level rise p_MHHW_2_foot_slr: Mean higher high water + 2' sea level rise p_MHHW_4_foot_slr: Mean higher high water + 4' seal level rise p_MHHW_6_foot_slr: Mean higher high water + 6' seal level rise p_MHHW_8_foot_slr: Mean higher high water + 8' seal level rise p_MHHW_baseline: baseline elevations from which the MHHW sea level rise layers were derived p_MHHW_FLOOD_2_foot_slr: Mean higher high water + one percent annual chance flood + 2' seal level rise p_MHHW_FLOOD_4_foot_slr: Mean higher high water + one percent annual chance flood + 4' seal level rise p_MHHW_FLOOD_6_foot_slr: Mean higher high water + one percent annual chance flood + 6' seal level rise p_MHHW_FLOOD_8_foot_slr: Mean higher high water + one percent annual chance flood + 8' seal level rise p_MHHW_FLOOD_baseline: baseline elevations from which the MHHW_FLOOD sea level rise layers were derived

The four data layers that incorporate the 100-year flood are based on the April, 2014 preliminary Digital Flood Insurance Rate Maps (DFIRMs) for Rockingham and Strafford Counties.

Purpose:

The data are intended to provide communities, coastal managers, scientists, and the public with a preliminary assessment of the extent of potential sea level rise.

Supplemental_Information: Data distribution tile: regional

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20191123
Ending_Date: 20200423

Currentness_Reference: Ground conditions

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -71.083084
East_Bounding_Coordinate: -70.467173
North_Bounding_Coordinate: 43.285349
South_Bounding_Coordinate: 42.815572

Keywords:

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Bathymetry/Topography
Theme_Keyword: Elevation
Theme_Keyword: Digital Elevation Model
Theme_Keyword: DEM
Theme_Keyword: LiDAR
Theme_Keyword: Inundation
Theme_Keyword: Flooding
Theme_Keyword: Topography
Theme_Keyword: Sea Level Rise

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: United States
Place_Keyword: Northeast
Place_Keyword: New England
Place_Keyword: New Hampshire
Place_Keyword: New Hampshire coastline

Access_Constraints: None
Use_Constraints:

The data are intended for planning purposes only and are not for legal or engineering use.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Earth Systems Research Center
Contact_Person: GRANIT Database Manager

Contact_Position: GRANIT Database Manager
Contact_Address:

Address_Type: mailing and physical address
Address: Morse Hall, University of New Hampshire
City: Durham
State_or_Province: NH
Postal_Code: 03824
Country: US

Contact_Voice_Telephone: 603-862-1214
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: granit@unh.edu
Hours_of_Service: 8:30AM-5PM, EST

Data_Set_Credit:

NH GRANIT, Earth Systems Research Center, University of New Hampshire

Native_Data_Set_Environment: ESRI geodatabase

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Attributes were generated during the geoprocessing and verified by logical and visual validation.

Logical_Consistency_Report:

The data layers were evaluated to ensure logical progressions in the depth values.

Completeness_Report: The data are complete for the region.
Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The data were derived from the coastal New Hampshire LiDAR collection (2020), with a 1/25-foot GSD (or 0.35-meter nominal pulse spacing).

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Vertical accuracy of the coastal LiDAR is 10.0 centimeters RMSEz or better.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: NV5 Geospatial, powered by Quantum Spatial
Publication_Date: 20210621
Title: NH Coastal Lidar Work Package 183374, Work Unit 183464; DEM

Type_of_Source_Media: None
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20191123
Ending_Date: 20200423

Source_Currentness_Reference: Ground_Condition

Source_Citation_Abbreviation: LIDAR
Source_Contribution: 1.25-foot LiDAR DEM

Source_Information:

Source_Citation:

Citation_Information:

Originator: FEMA
Publication_Date: 20140409
Title:

Preliminary DFIRMs (Digital Flood Insurance Rate Maps) - Rockingham and Strafford Counties, NH

Type_of_Source_Media: None
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20140409

Source_Currentness_Reference: Ground_Condition

Source_Citation_Abbreviation: FLOODPLAINS
Source_Contribution: Provided data for the 1% annual flood chance scenarios.

Source_Information:

Source_Citation:

Citation_Information:

Originator: AECOM
Publication_Date: 2018
Title: Processing ZONES layer

Type_of_Source_Media: None
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2018

Source_Currentness_Reference: none

Source_Citation_Abbreviation: ZONES
Source_Contribution:

Provided zone polygons by which the MHHW and 1% flood depths were supplied to the processing

Process_Step:

Process_Description:

Sea Level Rise rasters were developed by ESRC using the methodologies established by AECOM as reported in the related document: "Sea Level Rise Mapping Data - New Hampshire Open Coast, Piscataqua River, and Great Bay". The following describes the general workflow used to process each layer: 1) Convert ZONES to a raster layer based on the elevation value for the given SLR scenario 2) Subtract LIDAR from the raster version of ZONES for SLR1 3) Create SLR2 where values from the SLR1 >= 0 4) Create SLR3 to create pixel clusters 5) Create SLR4 where pixel clusters from SLR3 > 27878 6) Create SLR5 by running the ArcGIS "Fill" geoprocessing tool to fill sinks in SLR4 7) Create SLR6 by running the ArcGIS "Focal Statistics" tool to smmoth SLR5 (using Rectangle Neighborhood and the Majority statistic) 8) Convert SLR6 to integer raster to produce final raster contained in SLR geodatabase

Source_Used_Citation_Abbreviation: ZONES and LIDAR
Process_Date: 2023
Source_Produced_Citation_Abbreviation: SLR geodatabase

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Transverse Mercator
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: 0.000328
Ordinate_Resolution: 0.000328

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:

Overview_Description:

Entity_and_Attribute_Detail_Citation: None
Entity_and_Attribute_Overview:

Each feature class contains a "gridcode" field reporting 2-foot classes of estimated inundation depth. This value represents depth of water (in feet) above the original surface. The classes are: 2: 0-2 4: 2-4 6: 4-6 8: 6-8 10: 8-10 12: 10-12 14: 12-14 16: 14-16 18: 16-18 20: 18-20 22: 20-22 24: 22-24 26: 24-26 28: 26-28 30: 28-30 32: 30+

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Earth Systems Research Center, University of New Hampshire
Contact_Person: GRANIT Database Manager

Contact_Position: GRANIT Database Manager
Contact_Address:

Address_Type: mailing and physical address
Address: Morse Hall, University of New Hampshire
City: Durham
State_or_Province: NH
Postal_Code: 03824

Contact_Voice_Telephone: 603-862-1214
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: granit@unh.edu
Hours_of_Service: 8:30AM - 5 PM, EST

Resource_Description: Downloadable Data
Distribution_Liability:

Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited source materials. Earth Systems Research Center, under contract to the NH Office of Energy and Planning, and in consultation with cooperating agencies, maintains a continuing program to identify and correct errors in these data. OEP, ESRC, and the cooperating agencies make no claim as to the validity or reliability or to any implied uses of these data.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ESRI geodatabase
Transfer_Size: 1480

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM
Recording_Format: ESRI geodatabase

Fees:

No charge when downloaded from website. Cost of reproduction for provision on CD/DVD or other media.

Sea Level Rise - New Hampshire Open Coast, Piscataqua River, and Great Bay

Metadata: