Riparian Buffer Quality


Identification_Information:
Citation:
Citation_Information:
Originator:Natural Lands Trust with input data from ERRI and the EROS data center
Publication_Date:May 2006
Title:
Riparian Buffer Quality
Edition:first
Geospatial_Data_Presentation_Form:raster digital data
Online_Linkage: ftp://www.pasda.psu.edu/pub/pasda/nlt
Online_Linkage: http://www.natlands.org
Description:
Abstract:
This raster dataset has been created using inputs including "Networked Streams of Pennsylvania" data as originated by Environmental Resources Research Institute (see metadata entitled "netstreams.htm" and "Pennsylvania Land Cover dated 1992" developed by the EROS Data Center for EPA Federal Region III (see metadata entitled "Land Cover 1992 EPA Federal Region III.pdf"). 100 foot buffers of the networked streams were assigned value based on the Strahler stream order and the potential aquatic habitat values assigned to the 1992 land cover. The average conservation value for riparian buffers of 1-2 ordered streams, 3-5 ordered streams, and 6-12 ordered streams were then calculated for the small watersheds (see metadata entitled "smallsheds.xml"). Each of the above groups were then weighted and added together and quantiled into 10 classes to create an overall Riparian Buffer Quality by small watershed data set. Conservation values were determined by SmartConservation (registerd trademark) methodology.

Conservation values were determined by experts gathered by Natural Lands Trust through SmartConservation®. This data set is one of several that have been combined to create an overall aquatic resources conservation value raster for the Expanded Piedmont Ecoregion in Pennsylvania. Therefore the values were determined as a relative rank, comparable in value only to the other input aquatic resources data. Conservation value ranges from 1 - 10 with 10 being the highest value.
Purpose:
Assign conservation value to riparian buffers within the Expanded Piedmont Ecoregion of Pennsylvania.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:1992-1994
Currentness_Reference:
ground condition
Status:
Progress:Complete
Maintenance_and_Update_Frequency:Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -78.356474
East_Bounding_Coordinate: -74.540675
North_Bounding_Coordinate: 41.491614
South_Bounding_Coordinate: 39.197635
Keywords:
Theme:
Theme_Keyword_Thesaurus:ISO 19115 Topic Categories
Theme_Keyword:Riparian Buffer
Theme_Keyword:SmartConservation
Theme_Keyword:Expanded Piedmont
Theme_Keyword:Aquatic Resources
Theme_Keyword:imageryBaseMapsEarthCover
Theme_Keyword:environment
Place:
Place_Keyword:Piedmont
Place_Keyword:Expanded Piedmont
Place_Keyword:Pennsylvania
Access_Constraints:None
Use_Constraints:
None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person:Diane Rosencrance
Contact_Organization:Natural Lands Trust
Contact_Position:GIS Program Manager
Contact_Address:
Address_Type:mailing and physical address
Address:
1031 Palmers Mill Road
City:Media
State_or_Province:Pennsylvania
Postal_Code:19063
Country:USA
Contact_Voice_Telephone:610-353-5587
Contact_Electronic_Mail_Address:drosencrance@natlands.org
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.1.0.722
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Data_Quality_Information:
Lineage:
Process_Step:
Process_Description:
Process:
A script run by Natural Lands Trust's contractor, Avencia, assigned stream order based on the Strahler method to the networked streams. The output was then error-corrected by visual verification. Using the networked streams data, waterbodies were created by selecting the appropriate polylines and converting them to polygon. The waterbodies were then assigned stream order based on the Strahler method. Using the networked streams data, islands were created by selecting the appropriate polylines and converting them to polygon. Streams and waterbodies were sorted by stream order as follows: 1-2, 3-5, 6-12. Buffers (100 foot) were created on both sides of the sorted streams and waterbodies.  The buffers, waterbodies, and islands were converted to raster and merged together in order to create overall riparian buffer rasters by stream order  (1-2, 3-5, 6-12) with an assigned value of 1(for later processing). 

The 1992 Land Cover was reclassified based on SmartConservationTM methodology to assign potential aquatic habitat value as follows:

Water = 10
Low Intensity Developed = 0
High Intensity Developed = 0
High Intensity Commercial/ Industrial = 0
Hay/Pasture = 5
Row Crops = 2
Other Grass = 0
Evergreen Forest = 10
Mixed Forest = 10
Deciduous Forest = 10
Woody Wetland = 10
Emergent Herbaceous Wetland = 10
Bare; quarries, strip mines, sand pits = 2
Bare; bare rock and sand = 2
Bare; transitional = 5

Using Raster Calculator multiplied the riparian buffer (as stream order) rasters with the valued land cover in order to clip the land cover to the riparian buffer area and maintain the values assigned to land cover. Calculate Focal Variety with the following parameters: Statistic Type = Variety, Neighborhood = Rectangle, Height = 3, Width = 3, Units = cell. Reclassified the focal variety raster to bring the assigned values back to the land cover as follows: Old Value 1 = New Value 10; Old Value 2 = New Value 5; Old Value 3 = New Value 2; Old Value 4 = New Value 0. Converted the output raster to shapefiles and intersected with small watersheds in order to cut the riparian buffer values to the watershed boundaries. Dissolved the resulting intersection using an unique identifier in order to calculate the average value for each stream order group (1-2, 3-5, 6-12). Calculated the overall watershed value by weighting and adding the average riparian buffer values together in the field "RBLC_TW_AV" as follows:
(([Riparian Buffer 1-2avg]*.625)+([Riparian Buffer 3-5avg]*.31)+([Riparian Buffer 6-12 avg]*.065)) 

Converted the shapefile to raster based on the "RBLC_TW_AV" field. The output was then quantiled into 10 classes as follows:
 
Old Value		New Value
 0 			excluded
0-2.41			1
2.41 - 2.84		2
2.84 - 3.03		3
3.30 - 3.21		4
3.21 - 3.36		5
3.36 - 3.54 		6
3.54 - 3.72		7
3.72 - 3.98		8
3.98 - 4.63		9
4.63 - 9.35		10
Process_Date:2004-2005
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method:Raster
Raster_Object_Information:
Raster_Object_Type:Grid Cell
Row_Count:8320
Column_Count:10625
Vertical_Count:1
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name:Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number:18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian:0.999600
Longitude_of_Central_Meridian:-75.000000
Latitude_of_Projection_Origin:0.000000
False_Easting:500000.000000
False_Northing:0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method:row and column
Coordinate_Representation:
Abscissa_Resolution:30.000000
Ordinate_Resolution:30.000000
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
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: rclass2
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:Value
Attribute:
Attribute_Label:Count
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Pennsylvania Spatial Data Access (PASDA)
Contact_Address:
Address_Type:mailing address
Address:
115 Land and Water Building 
City:University Park
State_or_Province:Pennsylvania
Postal_Code:16802
Country:United States
Contact_Voice_Telephone:(814) 865 - 8792
Contact_Electronic_Mail_Address:pasda@psu.edu
Resource_Description:downloadabledata
Distribution_Liability:
The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size:2.101
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Metadata_Reference_Information:
Metadata_Date:20060517
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Natural Lands Trust
Contact_Person:Diane Rosencrance
Contact_Position:GIS Program Manager
Contact_Address:
Address_Type:mailing and physical address
Address:
1031 Palmers Mill Road
City:Media
State_or_Province:PA
Postal_Code:19063
Country:USA
Contact_Voice_Telephone:610-353-5587
Contact_Electronic_Mail_Address:drosencrance@natlands.org
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
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