Ic ucsc
Download
1 / 22

ic.ucsc - PowerPoint PPT Presentation


  • 100 Views
  • Uploaded on

ic.ucsc.edu. Sytsma 2005. Attiwill et al. 1993. Attiwill et al. 1993. Janse et al. 1997. How does phosphate that stored in forest vegetation and soils move into lakes?. Leaching and transport of soluble orthophosphate through ground or surface waters Transport of soil particles by erosion

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'ic.ucsc' - aida


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript





Ic ucsc

How does phosphate that stored in forest vegetation and soils move into lakes?

  • Leaching and transport of soluble orthophosphate through ground or surface waters

  • Transport of soil particles by erosion

  • Transport of organic material (*)


Ic ucsc

Sytsma 2005 soils move into lakes?


Ic ucsc

“For the 10 to 30 year old forests, three out of four study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”

ODF, 1996


Ic ucsc

Tree Foliage study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”

Understory Vegetation

Forest Floor

Uptake and Return

Cole & Rapp, 1981


Ic ucsc

Sytsma 2005 study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”


Ic ucsc

USDA Forest Service study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”


Ic ucsc

USDA Forest Service study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”


Ic ucsc

USDA Forest Service study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”


Ic ucsc

USDA Forest Service study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”


Ic ucsc

USDA Forest Service study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”


Ic ucsc

ODF 1996 study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”


Ic ucsc

ODF 1996 study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”


Ic ucsc

“For the 10 to 30 year old forests, three out of four study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”

ODF, 1996


Ic ucsc

Google Maps study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”


Ic ucsc

Possible Research Opportunities study areas had lower landslide densities than found in mature forest, and two of four had reduced erosion volume. For the 31 to 100 year old forests, three out of four study areas had both lower landslides and erosion volume as compared to mature forests. Therefore, for the most erosion prone landscapes, these results also indicate that 10 to 30 year old forests have a 75 percent chance of having a lower landslide density than mature forests. In a similar light, 31 to 100 year old forests have a 75 percent chance of having both lower landslide density and erosion (sediment delivery to channels) as compared with mature forests.”

  • Road density vs. phosphorus loading

    • Road densities can be obtained from aerial photographs.

    • It may also be possible to determine when road systems were built by looking at old aerial photographs.

  • Recently harvested or permanently cleared land area vs. phosphorus loading

    • ODF maintains data for all harvest operations in Oregon. It may be possible to monitor a lake long-term to see if phosphorus loading changes as harvest

    • activity increases or decreases in the watershed.