

![]() | Project title | What causes landslides? |
| Difficulty Level | High school | |
| Main link | Click here to view all details of this science project (Cached)  (View 3rd party site) | |
Description | ||
| A landslide inventory of the Touchet subbasin of the Walla Walla River Watershed was completed in 2002 by the WDNR. Using a combination of 1:24,000 scale orthophotos from 1996 and aerial photographs, nearly 250 possible landslides were located in the total 93 km2 (234 were accessed by road or trail; gates, road closures, or other obstacles prevented ground-truthing of the remaining 15 or so). The sites were then transferred to a topographic map to be used for field reconnaissance. Landslides are recognized on aerial photos and orthophotos by their hummocky terrain, light-colored material, lobe shape, etc. Each landslide was given a code depending on which specific drainage basin it was associated with. Slope angle, slide dimensions, and type (planar, deep seated, etc.) were estimated on the orthophotos, and then ground-truthing determined the actual characteristics. | ||
Materials | ||
| This idea is contained in a third-party website. To view the science fair projects, please click on the link above. Copyright in the third party website belongs to the relevant author. | ||
Brief Instructions | ||
| [Please see third-party website for instructions] | ||