20230428
09025000
1.0
FGDC CSDGM Metadata
FALSE
Debris_Flow_Traversal_Areas_Yamhill
002
383702.957811
448910.957811
4724214.283404
4800828.283404
1
0.000
Projected
GCS_North_American_1983
Linear Unit: Meter (1.000000)
NAD_1983_UTM_Zone_10N
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20230426
14185200
20230426
14185200
150000000
5000
FGDC
Version 6.2 (Build 9200) ; Esri ArcGIS 10.9.1.28388
Debris_Flow_Traversal_Areas
This File Geodatabase Feature Class contains predictions of the runout and deposition of debris flows in support of the Private Forest Accord Steep Slope Prescriptions; please refer to Appendix B: Delineating Landslide and Debris Flow Susceptibility in the Private Forest Accord (2022) Report. The principle attribute is: Debris Flow Traversal Areas.
<DIV STYLE="text-align:Left;font-size:12pt"><DIV><DIV><P><SPAN>Debris Flow Traversal Areas are headwater channels with a modeled probability of runout by a debris flow that continues to a fish-bearing stream. Riparian zones along the traversal area, or corridor, are sources of wood carried by debris flows to fish streams. The traversal areas are ranked based on the predicted probability, or likelihood, of debris flows along the channel. Probability is expressed in terms of the proportion of the total debris flow track length included within any watershed population of debris flow traversal areas associated with the likelihood of their occurrence. The highest 20% of the likelihood of debris flow traversal associated with 20% of the total track length in the population is ranked: zero to 20%; the next 20% is ranked as 21% to 40%, and so on.</SPAN></P><P><SPAN /></P><P><SPAN>. </SPAN></P><P><SPAN>. </SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Private Forest Accord Steep Slope Prescriptions; please refer to Appendix B: Delineating Landslide and Debris Flow Susceptibility in the Private Forest Accord (2022) Report.
ODF
Oregon
Oregon Department of Forestry
PFA
Private Forest Accord
Steep Slopes
Topography
Forest Resources
<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
0
Simple
FALSE
0
TRUE
FALSE
Debris_Flow_Traversal_Areas_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.
Fish
Fish
Double
8
0
0
Reach locations that are predicted to contain fish based on a model (Fransen et al. 2006), as adjusted upstream or downstream using field information on presence or absence of fish (Oregon Department of Forestry and or Oregon Department of Fish and Game).
Fransen, B. R., Duke, S. D., McWethy, L. G., Walter, J. K., and Bilby, R. E., 2006, A logistic regression model for predicting the upstream extent of fish occurrence based on geographical information systems data: North American Journal of Fisheries Management, v. 26, p. 960-975.
DF_prob
DF_prob
Double
8
0
0
The Miller and Burnett (2008) model of debris flow runout is used to identify stream channels susceptible to traversal and deposition from debris flows. The model integrates susceptibility to landslides (Miller and Burnett 2007), but with recalibration using LiDAR for the PFA, into debris flow initiation and estimates of runout probability. Miller, D. J., and Burnett, K. M., 2007, Effects of forest cover, topography, and sampling extent on the measured density of shallow, translational landslides: Water Resources Research, v. 43, no. W03433.
Miller, D.J. and K.M. Burnett, A probabilistic model of debris-flow delivery to stream channels, demonstrated for the Coast Range of Oregon, USA. Geomorphology, 2008. 94: p. 184-205.
DF_trav
DF_trav
Double
8
0
0
Debris Flow Traversal Areas are traced downslope to a fish-bearing channel or until the calculated debris flow probability of continued runout goes to zero. If the probability is greater than zero at the intersection of the flow path with a fish-bearing stream, the value is assigned to the originating DEM cell. For all cells along the runout path, this prediction is used to calculate the probability that a debris flow-initiated upslope traverses the cell and continues to a fish-bearing stream. Traversal probability increases as the number and initiation potential of upslope initiation sites increases.
Trav_prop
Trav_prop
Double
8
0
0
The debris flow traversal areas are ranked based on the predicted probability, or likelihood, of debris flows along the channel. Probability is expressed in terms of the proportion of the total debris flow track length included within any watershed population of debris flow traversal areas associated with the likelihood of their occurrence. The highest 20% of the likelihood of debris flow traversal associated with 20% of the total track length in the population is ranked: zero to 20%; the next 20% is ranked as 21% to 40%, and so on.
Length_m
Length_m
Double
8
0
0
NodeNum
NodeNum
Double
8
0
0
NodeLen_m
NodeLen_m
Double
8
0
0
20230426
EPSG
6.13(3.0.1)