1 / 8

Empirical Landslide Modeling

Empirical Landslide Modeling. Finn Krogstad UW Forest Engineering May 30, 1990. Overview. Why Empirical Modeling? A simple example Logistic Regression Results. Why Empirical Modeling?. Most landslide models show where landslides will be, but not how many.

brian-guy
Download Presentation

Empirical Landslide Modeling

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Empirical Landslide Modeling Finn Krogstad UW Forest Engineering May 30, 1990

  2. Overview • Why Empirical Modeling? • A simple example • Logistic Regression • Results

  3. Why Empirical Modeling? • Most landslide models show where landslides will be, but not how many. • If we want to evaluate operations or landscape plans, we need to know how many landslides will result from our plan.

  4. A simple example Q: How many landslides will a high hazard area produced? A: Count the fraction that have slid already, and apply this to the proposed action.

  5. Regression • The familiar form • can also be thought of as • Allows any mapable variables of interest • Already coded in ArcInfo • Output in Probability of Landsliding

  6. Hazard Mapping • Using just slope and curvature, we can create a hazard map, much like SMORPH. • This map can guide our design

  7. Operational Assessment • Calculate cell probabilities before and after the operation, subtract, and sum the differences (E(ls)=.364). before after difference

  8. Landscape Evaluation • Same as the Operational evaluation, but on a larger scale.

More Related