How Do Erosion Control Blankets Work in SWPPP?

A number of different components may be used when it comes to erosion control and related elements of stormwater management. One common example is an erosion control blanket - how do erosion control blankets work?

At Silver Leaf SWPPP, we're here to offer an unmatched range of SWPPP and stormwater management services around Utah, including erosion control and many other SWPPP best management practices (BMPs). Here are some basics on erosion control blankets - what they are, the materials often used for them, how they work and some basic processes for their installation and management on various sites.

What is an Erosion Control Blanket?

For those unaware, an erosion control blanket (also sometimes called an erosion control mat or straw mat) is a type of temporary cover or shield placed on land soil to protect against erosion. They come in various sizes and shapes depending on the specific needs of the site, but all serve the same basic purpose: To reduce the impact of rainfall and other water sources that can cause soil to wear away, protecting both landscapes and waterways from damage.

They work by holding soil, sand and other materials in place, preventing them from being washed away. This means they're ideal for use in areas prone to heavy rains, steep slopes or other forms of water flow that would otherwise create erosion issues.

Materials Used

Erosion control blankets can be made from a variety of materials depending on the specific needs of the site. Some common options include:

• Straw: One of the most common and cost-effective methods, straw is an affordable option that still offers effective protection against soil erosion.
• Coir: Made from coconut fibers, coir mats are durable and biodegradable, making them a popular choice for larger projects or sites with sensitive ecosystems.
• Polypropylene: A synthetic material that is strong and long-lasting, these blankets are ideal for high-traffic areas or projects that require a longer lifespan.
• Combination: In some cases, a combination of materials may be used to create a more effective erosion control blanket. This could include mixing straw with synthetic fibers for added strength and durability.

Direct Benefits of Erosion Control Blankets

There are a few key benefits to using erosion control blankets on construction sites or other areas where erosion is a concern:

• Cost-effective: Compared to methods like concrete channels, diversion ditches and riprap, erosion control blankets are often more affordable and easier to install.
• Easy installation: Speaking of which, most erosion control blankets can be quickly installed with minimal equipment or labor, making them a convenient option for many different types of projects.
• Flexible design: As mentioned, these blankets come in various sizes and shapes depending on the needs of your site. This means they can be easily customized to fit any area.
• Effective protection: Above all else, these blankets are highly effective at preventing soil erosion and protecting landscapes from damage due to runoff.

Installation and Management

When it comes to installing an erosion control blanket, the process will vary depending on the specific site and material being used. In general, however, installation involves each of the following steps:

• Site prep: Before installation can begin, the site must be properly prepared. This may include clearing debris, grading the land and ensuring proper drainage.
• Trench digging: When being installed on a slope or any kind of dune setting, trenches must be dug to hold the blanket in place.
• Stake placement: Stakes or pins are then placed along the edges of the blanket and throughout its center, securing it to the ground.
• Blanket installation: The erosion control blanket is then laid out and unfolded across the designated area.
• Additional measures: Depending on the specific site and soil conditions, additional measures may be taken to ensure proper erosion control. This could include adding seed or other vegetation, as well as using other BMPs such as silt fences or sediment basins to further reduce erosion risks.

Proper management of an erosion control blanket involves regularly inspecting for any damage or issues that may compromise its effectiveness. In some cases, maintenance such as reseeding or adding additional material may be necessary to ensure continued protection against erosion.

Seeding Over Erosion Control Blankets

In some settings, it may be beneficial to seed over an erosion control blanket. This can help promote the growth of vegetation and further stabilize the soil, creating a more solid barrier against erosion. However, it's important to carefully consider the type of seed being used and its compatibility with the blanket material. In some cases, pre-seeded blankets may be available for purchase.

At Silver Leaf SWPPP, we understand that every site is unique and requires tailored solutions for effective stormwater management around Utah. That's why we offer a variety of services and BMPs such as erosion control blankets to meet the specific needs of each project. Contact us today to learn more about how our experienced team can assist you with all your SWPPP needs.