Presentations & Publications

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Woodward, J.S., 2023, Shallow Landslide Erosion Rates on Industrially Managed Timberlands: Key Factors Affecting Historical and Contemporary Rates. Environmental & Engineering Geoscience 2023; doi: https://doi.org/10.2113/EEG-D-22-00005.

*Winner of 2023 AEG Publication Award for outstanding professional paper.

 Woodward, J.S., House, M.R., 2019, Landslide Geometry, Modeling Landslide depths: AEG Annual Meeting 2019, Asheville, NC, Oral Presentation Technical Session 13. (Abstract published in AEG News https://issuu.com/aeg275/docs/aeg_2019_pwa.fin )

   Woodward J., House, M., Lamphear, D. 2017. Development of Preventative Streamside Landslide Buffers on Managed Timberlands in Northern CA. Coast Redwood Sciences Symposium: Past Successes and Future Directions, Proceedings of a workshop. Gen. Tech. Rep. PSW-GTR-258. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, pp149-161.  DOI:https://doi.org/10.2737/PSW-GTR-258    

 Woodward, J., House, M., Lamphear, D., 2012, Delineation of Preventative Landslide Buffers Along Steep Streamside Slopes in Northern California in Proceedings of the Coast Redwood Forests in a Changing California: A Symposium for Scientists and Managers, Standiford, Richard B.; Weller, Theodore J.; Piirto, Douglas D.; Stuart, John D, technical coordinators: United States Forest Service General Technical Report, PSW-GTR-238, Part 1, pp213-223.  DOI:https://doi.org/10.2737/PSW-GTR-238 

 Woodward, Jason S., 2009 On Record; Over 100 Years of Timber Harvesting and Slow-Moving, Deep-Seated Landslides in Northern California, AEG Annual meeting, Lake Tahoe 2009, Poster Session. 

In Humboldt County, California, four survey monuments along a section line within the Blue Lake Quadrangle contain survey data dating as far back as 1902. These monuments have been resurveyed up to four times over a 105 year period. Two of the monuments record significant movement of deep-seated landslides located within mélange of the central belt of the Franciscan. With timber harvesting in the area dating back to 1875, rates of movement over the survey periods range from 0.14 to 2.1 feet per year in a consistent southwesterly direction. The historic survey monuments provide valuable information about the extent and long-term rates of movement in this area. However, the survey data can not resolve the question of whether or not short-term rate changes are related to management activities or natural slope movement due to irregular and some-times large intervals (7 to 56 years) between surveys and lack of information regarding timing of specific management activities. Ultimately we can see that the ground has been moving in these areas for along period of time regardless of timber harvesting and that the rates of movement range very slow to extremely slow. In the future we intend to continue to monitor these and additional sites on an annual basis. This combined with more detailed records of harvesting and rainfall events will provide a better understanding of the effects of timber harvesting on deep-seated landslides in this region.

 John M. Coyle and Jason S. Woodward, ESTIMATING SEDIMENT DELIVERY FROM A LARGE BEDROCK LANDSLIDE; AEG Annual meeting, Las Vegas 2005, poster session.