20230428
08554500
1.0
FGDC CSDGM Metadata
FALSE
Trigger_Sources_Yamhill
002
393630.957811
445310.957811
4727004.283404
4800266.283404
1
0.000
Projected
GCS_North_American_1983
Linear Unit: Meter (1.000000)
NAD_1983_UTM_Zone_10N
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20230426
14190300
20230426
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5000
FGDC
Version 6.2 (Build 9200) ; Esri ArcGIS 10.9.1.28388
Trigger_Sources
1
-124.312426
-123.667653
43.353262
42.688165
Certain landslides can trigger a debris flow, these are referred to as "trigger sources". The Designated Sediment Source Areas, related to PFA prescriptions, are typically located high in the headwalls of the PFA-designated Debris Flow Traversal Area Subbasins. Trigger Sources are delineated to identify those Designated Sediment Source Areas with the greatest expected sensitivity to tree removal so that needed yarding corridors can be placed through less sensitive zones.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Hillslope areas are ranked by the potential for initiation of a landslide that triggers debris flows to fish streams that originate from within each Designated Sediment Source Area</SPAN><SPAN><SPAN>. The zones containing the most susceptible fifth (20%) of these initiation sites are referred to as </SPAN></SPAN><SPAN>Trigger Sources. </SPAN></P></DIV></DIV></DIV>
ODF
Oregon
Oregon Department of Forestry
PFA
Private Forest Accord
Steep Slopes
Topography
Forest Resources
Private Forest Accord Steep Slope Prescriptions; please refer to Appendix B: Delineating Landslide and Debris Flow Susceptibility in the Private Forest Accord (2022) Report.
<DIV STYLE="text-align:Left;font-size:12pt"><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>The Oregon Department of Forestry GIS data is derived from a variety of sources. The digital data and their documentation have been reviewed for accuracy and completeness, however, the Oregon Department of Forestry and its representatives make no warranty or representation, either expressed or implied, with respect to the digital data and their documentation, their quality, performance, merchantability, or fitness for a particular purpose. Digital data are distributed on “AS IS” basis and the users assume all risk as to their quality, the results obtained from their use, and the performance of the data.</SPAN></SPAN></P></DIV>
File Geodatabase Feature Class
0.000
dataset
EPSG
6.13(3.0.1)
0
Simple
FALSE
0
TRUE
FALSE
Trigger_Sources_Yamhill
Feature Class
0
OBJECTID
FID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
0
0
0
Feature geometry.
Esri
Coordinates defining the features.
Id
Id
Integer
4
0
0
gridcode
gridcode
Integer
4
0
0
acres
acres
Single
4
0
0
Trigger hollows are mapped in terms of acerage.
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
Shape_Area
Shape_Area
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
20230426