Q:

What does the phrase "grass erosion dam" mean?

A:

Quick Answer

Whether in utility work, road construction or agriculture, grass erosion dams are either net tubes used to slow the flow of runoff or unploughed strips of earth used to prevent soil from being washed away due to erosion. In either application, the goal is the same: reduce the risk of water eroding the surrounding area.

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Full Answer

While the application and forms can vary, erosion dams are an essential part of any construction project. This is especially true with very damp areas or construction taking place on a slope. With road construction, the risk of the roadway being undercut by water run off is very real. The danger results from a loss of structural stability which occurs when too much of the supporting soil becomes stripped from beneath the asphalt, eventually causing the shoulder of the road to fail and collapse. Any disturbed earth presents a similar problem, whether from recent utility work or other construction work. To prevent this, mats or tubes of clay and grass stalks are secured to the ground in high risk areas. These products dam up a drainage area or create a catch point for run off, giving it a chance to soak in the soil while also impeding its momentum as it moves downhill.

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Related Questions

  • Q:

    How is erosion prevented?

    A:

    There are several ways to prevent erosion, including grassing waterways, conserving tillage, covering crops, managing pastures and fortifying stream and riverbanks. Some erosion control methods, such as fortifying embankments along waterways, take place at the source, while others, such as modifying farming techniques, occur offsite. These techniques help to control and stabilize erosion on short- and long-term bases and are ideally used in combination.

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  • Q:

    How does erosion occur?

    A:

    Erosion occurs as a result of wind and water moving across earth and picking up part or all of dirt or rocks. By definition, erosion only requires earth to be moved, but in most cases, rocks or land are also worn down or broken into pieces.

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  • Q:

    How does erosion change the earth's surface?

    A:

    Erosion changes the Earth's surface by a process of breaking down and displacing soil and other material caused by wind, rain and other types of weathering. Erosion may cause soil in a region to be loosened, transported and deposited in a new area.

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  • Q:

    What is soil erosion?

    A:

    Soil erosion is a natural or artificial process where the top layers of soil are blown or washed away from wind or water. Most soil erosion is caused by natural sources like wind and rain.

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