Headwater Protection


Identification_Information:
Citation:
Citation_Information:
Originator:Natural Lands Trust
Publication_Date:May 2006
Title:
Headwater Protection
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 "small watersheds" (see metadata entitled "smallsheds.xml") and the National elevation datasets collected through PASDA (www.pasda.psu.edu). Flow accumulation was calculated using GIS and values were assigned to the raster based on the amount number of cells flowing into each cell as follows:
# of cells flowing into		Value
	0-2				10
	2-4	     			9
	4-22				7
	22-112				5
	112-1414			3
	1414-2828			2
	2828-5656			1
	>5656		          		0
This was then intersected with the small watersheds and conservation value was assign to the watersheds based on the average value of the flow accumulation within the watershed.

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. 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 watersheds based on headwaters protection using flow accumulation within the Expanded Piedmont Ecoregion of Pennsylvania.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:2000
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:Headwater
Theme_Keyword:SmartConservation
Theme_Keyword:Expanded Piedmont
Theme_Keyword:Aquatic Resources
Theme_Keyword:Flow Accumulation
Theme_Keyword:Headwater Protection
Theme_Keyword:inlandWaters
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:
Create Flow Accumulation grid for the area
Add "Hydrology Modeling" toolbar - in ArcInfo only

Fill Sinks
Hydrology pulldown - fill sinks
Input: "NED_PA"
Fill Limit: <Fill_All>
Save as: "NED_PA_Fill"
in ...\individual_grid\NED_PA_fill_sinks\

Flow Direction
Hydrology pull-down - flow direction
Input: "NED_PA_Fill"
Do not select create Drop no force flow at edge
Save as: "NEDPA_FlowDir"
in ...\individual_grid\NED_PA_flowdirection\

Flow Accumulation
Hydrology pulldown - flow accumulation
Input: "NEDPA_FlowDir"
Save as: "NEDPA_FlowAcc"
in ...\individual_grid\NED_PA_Flow_accumulation\

Reclassify to assign Conservation Value to Flow accumulation based on Peer/Biological Scores
	Old Value		New Value
	0-2			10
	2-4	     		9
	4-22			7
	22-112			5
	112-1414		3
	1414-2828		2
	2828-5656		1
	>5656		          	0
Save as: "FlowAcc_Rank"
	in ...\Individual_Grid\Flow_Accumulation_FirstRank\

Clip to Study Area
Use 'study area' as mask
Raster Calc: [Flow_Acc_Rank]
Save as: " 'study area'_FlowAccRa"
	In: \'study area'\individual_grid\Flow_Accumulation_First_Rank\


Convert to Feature
Input " 'study area'_FlowAccRa"
Save as: " 'study area'_FlowAcc_First_Rank"
	in \'study area'\shapefiles\
 
Interest with "Orderedwshed_'study area'" 
(created by selecting watersheds that intersect the study area - do NOT clip at study area boundary)
Input: " 'study area'_FlowAcc_First_Rank"
Overlay "Orderedwshed_'study area'"
Save as: " 'study area'_flowAcc_FirstRank_by_wshed"
	in \'study area'\shapefiles\

Dissolve
Input: " 'study area'_flowAcc_FirstRank_by_wshed"
field: "Unique_id" (from watersheds)
Save as: " 'study area'_FlowAcc_by_wshed_dissolve"
	in ...\'study area'\shapefiles\
additional field: "Gridcode" as average
(gives the average value of each watershed based on the conservation value by # of cells flowing into the cell - the higher the average, the more headwaters in the watershed)

Convert to grid 
>Use: "Exp_Ridge_Vall" as mask
Input: " 'study area'_FlowAcc_by_wshed_dissolve"
based on "Ave_gridco" field 
Save as: " 'study area'_Headwaters"
	In: \'study area'\Ranked_Grid_Interim\ Headwaters_Protection\

Reclassify to set rank based on 10 quantities 
Expanded Piedmont & Expanded Ridge & Valley
Old Value		New Value
0-7.055			1
7.055-7.169		2
7.169-7.233		3
7.233-7.302		4
7.302-7.352		5
7.352-7.390		6
7.390-7.425		7
7.425-7.467		8
7.467-7.519		9
7.519-10		10
Process_Date:2004-2005
Process_Step:
Process_Description:
Metadata imported.
Source_Used_Citation_Abbreviation:
Y:\ArcGIS_Projects\Smart Conservation Documentation\Metadata\Aquatic\riparian buffer quality expanded piedmont.xml
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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_TDD/TTY_Telephone: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:2.065
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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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