GIS Data Catalog
Landslide Hazards along River Corridors - Rock avalanche deposit
Landslide Hazards along River Corridors - Rock avalanche deposit
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Summary
Suitable for general reference and analyses.
Identifies only rock avalanche deposits along the river corridor within the study limits in King County.
Description
Rock avalanche is a style of landslide characterized by the simultaneous failure of an entire bedrock hillslope and with the dislodged mass cascading to the valley below.
Rock avalanches move at extremely high speeds and are potentially massive in size.
They can extend farther from the base of slope and cover a much larger area compared with individual rock fall.
Layer information
| Layer Name | lsr_rf_rockavalanchedeposit_area |
|---|---|
| Subject Category | Environment |
| Title | Landslide Hazards along River Corridors - Rock avalanche deposit |
| Feature Count | 3 |
| Feature Type | Polygon |
| Next Update | None planned |
| Spatial reference | EPSG:2926 |
| Control ID | 2563 |
| Place Keywords | Pacific NW, King County, WA, Washington State |
| Theme Keywords | Enviro, Pacific NW, King County WA, Washington State, Landslide, Slide, Mass Movement, Landslide Hazard Mapping, Debris Slides, Shallow Landslides, Shallow Landsliding, Debris Sliding |
| Supplemental Information |
Rock avalanche deposits were identified within the study limits using USGS geologic maps, review of LiDAR imagery, interpretation of orthophotography, field investigation, and geotechnical reports. The figure below is an example of a rock avalanche deposit mapped in the South Fork Skykomish River valley. Due to the lack of detailed information on significant variables including rock strength, zones of weakness and joint patterns, predictions of future sites of rock avalanches were not feasible. |
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Attribute information
|
OBJECTID
From Esri |
Description
Internal feature number. DomainSequential unique whole numbers that are automatically generated. |
|---|---|
|
Mapby
From King County |
Description
Author of mapped shapes DomainKC_DNRP |
|
Notes
From King County |
Description
Not Found DomainBeckler Peak, Index Creek, Moon Valley Rd-Mt Si |
|
Mapdate
From King County |
Description
Date Author completed mapping Domain2016-06 |
|
MapMethod
From King County |
Description
Method to map deposits DomainUSGS Maps |
|
LiDARSrce
From King County |
Description
Source LiDAR imagery and date imagery data sent to Author DomainKC GIS 2016-06 |
|
Shape
From Esri |
Description
Feature geometry. DomainCoordinates defining the features. |
|
Shape.area
No Source Noted |
Description
Not Found DomainNot Found |
|
Shape.len
No Source Noted |
Description
Not Found DomainNot Found |
Contact information
| Maintained by | DNRP - Water and Land Resources |
|---|---|
| Primary |
Harkeerat Kang
Harkeerat.Kang@kingcounty.gov |
Terms of Use
| License | Terms of use and copyright |
Use this Data
|
Links
How to use in ArcGIS Pro |
|
| Sharing Status | Public |
Summary
Suitable for general reference and analyses.
Identifies only rock avalanche deposits along the river corridor within the study limits in King County.
Description
Rock avalanche is a style of landslide characterized by the simultaneous failure of an entire bedrock hillslope and with the dislodged mass cascading to the valley below.
Rock avalanches move at extremely high speeds and are potentially massive in size.
They can extend farther from the base of slope and cover a much larger area compared with individual rock fall.
Contact information
| Maintained by | DNRP - Water and Land Resources |
|---|---|
| Primary |
Harkeerat Kang
Harkeerat.Kang@kingcounty.gov |
Terms of use and copyright
| License | Terms of use and copyright |