scarps_lidar: Feature class containing landslide head scarp lines identified and digitized based on geomorphological characteristics in the high-resolution 2019 lidar data. deposits_lidar: Feature class containing polygons outlining the extent of landslide deposits identified in the high-resolution 2019 lidar data. deposits_photo: Slope failures identified in georeferenced aerial images. runouts: Feature dataset collection of feature classes that provide categorical volume and dimensions of modeled hypothetical debris flow runouts from steep catchments in the Homer area. Runout zones are computed using LaharZ (Iverson and others, 1998; Schilling, 1998), and debris flow material characteristics are from Griswold and Iverson (2008). Volumes for runout zone modeling were estimated per catchment based on percentages (5, 10, 25 percent) of the total volume of topsoil in the catchment, as well as the percentage of catchment identified as having sustained slope failure in the historical period. Estimated points beyond which sediments are deposited are based on the geomorphological characteristics of each catchment. FOS-5m: Raster image data model of the relationship between shear forces acting to move material downslope and forces acting to resist downslope movement. This model was used as a proxy for shallow landslide susceptibility.
Online Links:
DGGS collected and processed lidar for use in this landslide hazard resiliency project for the City of Homer, funded by the Federal Emergency Management Agency (FEMA) through Cooperating Technical Partnership (CTP) with the City of Homer and DGGS under federal grant number CTP EMS-2018- CA-00016-S01. DGGS thanks the Homer Planning Commission for guidance throughout the multi-year project and Jonathan Godt, Rich Buzard, and Bretwood Higman for constructive reviews that significantly improved this manuscript. We also thank Amy Macpherson for GIS support and Kristen Janssen for designing the report layout.
This study provides a regional evaluation of landslide hazards in and around the City of Homer. The study aims to help the community better understand landslide hazards, inform mitigation efforts, guide future development activities, and protect public safety.
Online Links:
Online Links:
Online Links:
Online Links:
Online Links:
Are there legal restrictions on access or use of the data?Access_Constraints:
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).Use_Constraints:Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
| Data format: | digital data in format geodatabase, raster |
|---|---|
| Network links: |
https://doi.org/10.14509/31155 |