Identification_Information: Citation: Citation_Information: Originator: New Hampshire Department of Environmental Services Publication_Date: 20221116 Title: Statewide Aquifer Transmissivity for New Hampshire Geospatial_Data_Presentation_Form: vector digital data Other_Citation_Details: Digital access to the original reports is available. See https://pubs.er.usgs.gov/ Online_Linkage: Online_Linkage: Description: Abstract: Multiple studies were conducted by the U.S. Geological Survey, in cooperation with the New Hampshire Department of Environmental Services, Water Resources Division, to describe the geohydrology and water quality of stratified-drift aquifers river basins throughout New Hampshire. These studies were published between 1989 and 1998. This shapefile was created by the NH Department of Environmental Services by merging the transmissivity datasets from all the drainage basin study areas. Polygons with no transmissivity values were removed. In areas where study areas overlap, numerous sliver polygons may occur. In these areas, use of the study area-level datasets may provide more consistent data. No formal metadata were created to accompany this shapefile. Aquifer transmissivity is defined as the rate at which water can be transmitted through a unit width of aquifer under a unit hydraulic gradient (Heath 1983). Transmissivity is equal to saturated thickness multiplied by horizontal hydraulic conductivity and is expressed in feet squared per day (ft /d). Data sets available from the 13 studies may include aquifer boundary lines and polygons, transmissivity, saturated thickness, water table, wells, low flow sites, and seismic lines. Purpose: These data can be used for producing maps and illustrations. In areas where study areas overlap, numerous sliver polygons may occur. In these areas, use of the study area-level datasets may provide more consistent data. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20050801 Currentness_Reference: August 1, 2005 Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -72.587957 East_Bounding_Coordinate: -70.725653 North_Bounding_Coordinate: 45.118430 South_Bounding_Coordinate: 42.694221 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: boundaries Theme_Keyword: environment Theme_Keyword: geoscientificInformation Theme_Keyword: inlandWaters Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: geohydrology Theme_Keyword: stratified-drift aquifers Theme_Keyword: New Hampshire Theme_Keyword: groundwater quality Theme_Keyword: transmissivity Access_Constraints: None Use_Constraints: Transmissivity values should be considered estimates. In areas where study areas overlap, numerous sliver polygons may occur. In these areas, use of the study area-level datasets may provide more consistent data. Original scale 1:24000, horizontal accuracy of boundary believed to be about + or - 80ft for a solid line. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: US Geological Survey Contact_Address: Address_Type: unknown Address: 361 Commerce Way City: Pembroke State_or_Province: NH Postal_Code: 03275 Contact_Voice_Telephone: (603) 226-7825 Data_Set_Credit: US Geological Survey Water Resources Investigations Reports 90-4161, 92-4154, 88-4128, 92-4013, 91-4025, 94-4181, 92-4192, 94-4083, 94-4182, 96-4318, 95-4123, 94-4150. Native_Data_Set_Environment: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.4.1.5686 Data_Quality_Information: Logical_Consistency_Report: Completeness_Report: Lineage: Process_Step: Process_Description: Transmissivites of stratified-drift aquifers, in feet squared per day (ft2/d), were estimated from test-boring logs by calculating hydraulic conductivity for specific intervals, multiplying these values by the saturated thickness of the interval, and summing the results. Transmissivity values report by published engineering consultants were used as well as calculating transmissivites from unpublished aquifer test data. The transmissivity coverage is a polygon coverage where each polygon represents a range a transmissivity; for example, 0 to 1,000 ft2/d. Some polygons are hills of till that protrude the stratified-drift and, therefore, have a transmissivty of 0ft2/d. Transmissivities were first interpreted on paper topographic maps, then transferred to 1:24,000 or 1:25,000 scale-stable mylar USGS quadrangle maps and digitized into a geographic information system (GIS), using ARC/INFO version 6.0. The quadrangle maps were then merged into one study-wide coverage and edited for errors and discrepancies. The finished study-wide coverage was clipped to the hydrography coverage ( 1:24,000 or 1:25,000 scale hydrography representaion obtained from converting USGS Digital Line Graphs (DLG) into ARC/INFO coverages), so that transmissivity did not extend into rivers (those that were wide enough to be a polygon in the hydrography coverage) or other surface water bodies such as lakes or ponds. Revisions were made after colleague and editorial review. Data were reviewed by the USGS and N.H. Dept. of Environmental Services, Water Resources Division. Process_Date: Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: USGS Contact_Address: Address_Type: Address: City: State_or_Province: Postal_Code: Contact_Voice_Telephone: Process_Step: Process_Description: Data from 13 drainage basin transmissivity datasets were merged to create one statewide shapefile. Polygons with no transmissivity data were removed. In regions where study areas overlap, numerous sliver polygons may occur. In these areas, use of the study area-level datasets may provide more consistent data. Process_Date: 20150101 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: NH Department of Fish and Game Contact_Person: Catherine Callahan Contact_Address: Address_Type: physical Address: 11 Hazen Dr City: Concord State_or_Province: NH Postal_Code: 03301 Contact_Voice_Telephone: 603-271-3421 Process_Step: Process_Description: Metadata containing available information were complied for these data. Process_Date: 20171214 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: NH GRANIT Contact_Address: Address_Type: mailing and physical Address: University of New Hampshire Address: Earth Systems Research Center Address: Institute for the Study of Earth, Oceans and Space Address: 8 College Rd, Morse Hall City: Durham State_or_Province: NH Postal_Code: 03824 Country: US Contact_Voice_Telephone: 603-862-1792 Contact_Facsimile_Telephone: 603-862-0188 Contact_Electronic_Mail_Address: granit@unh.edu 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: 5484 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: NAD 1983 StatePlane New Hampshire FIPS 2800 Feet Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9999666666666667 Longitude_of_Central_Meridian: -71.66666666666667 Latitude_of_Projection_Origin: 42.5 False_Easting: 984250.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000000007286182768240225 Ordinate_Resolution: 0.000000007286182768240225 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: NH_transmissivity Entity_Type_Definition: Aquifer Transmissivity data Entity_Type_Definition_Source: USGS 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: COV_ID Attribute_Definition: Feature identification number Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers used to identify features. Attribute: Attribute_Label: STUDY Attribute_Definition: Name of the watershed area in which features reside. Attribute_Definition_Source: None Attribute_Domain_Values: Unrepresentable_Domain: Text field Attribute: Attribute_Label: TMAX Attribute_Definition: Upper limit of the transmissivity zone, in feet squared per day. If TMAX is undefined then it is set equal to 99999 Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Integer field Attribute: Attribute_Label: TMIN Attribute_Definition: The lower limit of the transmissivity zone, in feet squared per day. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Integer field Attribute: Attribute_Label: RANGE Attribute_Definition: A single value that defines the transmissivity zone (in feet squared per day). For example a zone with transmissivty greater than 8000 feet squared per day has a TMAX of 99999, a TMIN of 8000, and range of 16. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: 0 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: less than 500 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: 0 to 1000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 4 Enumerated_Domain_Value_Definition: 500 to 1000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 6 Enumerated_Domain_Value_Definition: greater than 1500 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 7 Enumerated_Domain_Value_Definition: 0 to 2000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 8 Enumerated_Domain_Value_Definition: 1000 to 2000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 9 Enumerated_Domain_Value_Definition: 2000 to 3000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 10 Enumerated_Domain_Value_Definition: greater than 3000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 11 Enumerated_Domain_Value_Definition: 2000 to 4000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: greater than 4000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 13 Enumerated_Domain_Value_Definition: 4000 to 6000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 14 Enumerated_Domain_Value_Definition: greater than 6000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 15 Enumerated_Domain_Value_Definition: 4000 to 8000 Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 98 Enumerated_Domain_Value_Definition: unable to contour transmissivity Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 99 Enumerated_Domain_Value_Definition: unable to contour transmissivity and saturated thickness Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: DESCRIPTIO Attribute_Definition: A text field explaining the meaning of the RANGE value. Attribute_Definition_Source: NH DES Attribute_Domain_Values: Unrepresentable_Domain: Text field Metadata_Reference_Information: Metadata_Date: 20221116 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: NH GRANIT Contact_Address: Address_Type: mailing and physical Address: University of New Hampshire Address: Earth Systems Research Center Address: Institute for the Study of Earth, Oceans and Space Address: 8 College Rd, Morse Hall 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 Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time