When does Soil Erosion Occur

This topic has 1 reply, 2 voices, and was last updated 10 years ago by Rob Halpern.

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October 11, 2014 at 2:53 pm #152358

Zack Young
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Based on an Hjulstrom’s erosion chart, I’m trying to figure where erosion occurs on a site. The chart shows when soil types will erode once water at a certain velocity will contact it.

I’m not very knowledgeable in engineering or soil types, so I have two questions:

1) Is there a formula I can use to calculate the peak velocity of water flow over constant slopes on the site?

2) Can the soil types for Woodland and lawn be typified? (woodland mostly loam?/silty loam? lawn mostly clay loam?)

Any advice would be appreciated.

October 29, 2014 at 10:30 am #152359

Rob Halpern
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Each soil must be understood for its own traits. Often a civil engineer will be needed on the team.

I worked on a project where the soils were a crumbly shale. They were not going to erode but more likely would collapse. Now I am working on a project 45 miles from that one. Soils are old Great Lakes dunes, 98%sand. Easily eroded. Forest cover looked similar in each case.
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