Non woveb silt fence

Types of non woven silt fence

A non-woven silt fence is a temporary barrier installed on construction sites to control water and soil runoff. It is designed to prevent soil erosion by trapping sediments carried by water runoff. The silt fence is made up of geotextile fabric that is not woven, which means it is bonded through mechanical methods such as needling, punching, or adding chemical adhesives. It is also reinforced with polypropylene strings. Non-woven silt fences are preferred over woven ones because they are lighter, cheaper, and have better filtration properties. Here are the types:

• Reinforced Non-Woven Silt Fence:

  This fence is made from non-woven fabric with reinforcing elements, making it more robust and durable. The reinforcement usually comprises long, high-strength fibers integrated into the fabric during manufacturing. The reinforced silt fence provides excellent sediment filtration while maintaining structural integrity. It is ideal for applications requiring higher sediment retention, like large construction sites or projects in areas with heavy rainfall. The reinforced silt fence is easier to install and requires minimal maintenance.

• Woven Geotextile Silt Fence:

  This is a commonly used type of silt fence. It is constructed from woven polypropylene yarns that create a strong, durable fabric. The woven design allows for excellent water flow while trapping sediments. It is reusable and suitable for long-term erosion control projects. The woven silt fence is also UV stabilized to prevent degradation from sunlight. It is available in various sizes to suit different project needs and has high tensile strength to withstand site conditions.

• Non-Reinforced Non-Woven Silt Fence:

  This type of silt fence is constructed from non-woven fabrics such as polypropylene or polyester. It is lighter and easier to handle than reinforced silt fences. While it lacks reinforcement, it still provides adequate sediment retention for low to medium sedimentation areas. It has excellent filtration properties due to its fabric structure. Non-reinforced non-woven silt fence is cost-effective for projects with a limited budget. It is easy to install and dispose of when no longer needed.

Functions and features of non woven silt fence

Both siltation and erosion are environmental challenges that construction sites face. Non-woven silt fences are used as temporary sediment control measures on construction sites to prevent runoff water from carrying sediments into nearby water bodies. The key features that define them include:

• Materials used: Non-woven geotextile fabric is made from polypropylene materials. The fabrics are usually needle punched, which aids in the filtration of water while allowing sediments to be trapped. The non-woven silt fence fabric is UV stabilized to prevent degradation from the sun's rays.
• Permeability: Non-woven silt fence fabrics allow water to flow through them at a controlled rate. The permeability of these fabrics is tested and certified according to ASTM standards. The rate of water flow through the non-woven silt fence varies depending on the soil texture and sediment load.
• Strength and durability: Non-woven silt fence fabrics are durable and robust. They are resistant to chemicals, UV rays, and atmospheric conditions. The UV stabilization of the silt fence fabric allows them to withstand prolonged exposure to sunlight. They also have reinforced edges to prevent tearing and ensure longevity.
• Filtration efficiency: Non-woven silt fences trap sediments with an average diameter of 0.1 mm. They can trap fine sediments and debris with higher efficiency. The sediment retention and filtration efficiency of these silt fences are tested in controlled environments according to ASTM standards.
• Installation features: Non-woven silt fences have pole sleeves that ease the installation of support poles. They have reinforced edges and installation guidelines to facilitate quick installation and maintenance.
• Environmental compliance: Non-woven silt fences have UV stabilization that complies with ASTM standards. They are manufactured with materials that are not harmful to the environment. The polypropylene and other chemical materials used in their manufacture have a life cycle analysis.
• Customization options: Non-woven silt fences can be customized according to the construction site. They come in different sizes, strengths, and sediment retention capacities. They can also be tailored to fit different topographies and construction site requirements.

Scenarios of non woven silt fence

Non-woven silt fences are widely used in various industries and applications. It is because they are effective in controlling erosion and managing sediment runoff. Here are some common usage scenarios:

• Construction Sites

  Non-woven silt fences are installed around the perimeter of construction sites. It helps to prevent sediment from entering storm drains and waterways. This minimizes the environmental impact of the construction activities. Non-woven silt fences are also used to create temporary sediment traps on-site.

• Land Development Projects

  These fences are commonly used in residential, commercial, and infrastructure development projects. They protect nearby water bodies, wetlands, and sensitive habitats from sedimentation. This ensures compliance with environmental regulations and permits.

• Road and Highway Construction

  Silt fences are deployed along roadways, highways, and transportation infrastructure. Especially in areas undergoing excavation, grading, or construction activities. They intercept and filter sediment-laden runoff during rain events.

• Agriculture and Farming

  Non-woven silt fences control water and soil erosion in farming fields, vineyards, and agricultural lands. They minimize the loss of topsoil and runoff during heavy rains. They also protect watercourses and irrigation systems from sedimentation.

• Environmental Restoration Projects

  These silt fences are used in projects aimed at restoring wetlands, streams, and disturbed lands. They help manage sediment during construction activities and natural processes. This promotes effective habitat restoration and sedimentation.

• Mining Operations

  Silt fences are deployed in mining sites, including quarries and open-pit mines. They reduce sediment runoff from disturbed areas and protect nearby water bodies. They are also used in post-mining land reclamation efforts.

• Drainage Ditches and Swales

  Non-woven silt fences are sometimes placed across drainage ditches and swales. This helps to slow down water flow and promote sedimentation. They are effective in areas where traditional sedimentation structures are impractical.

• Event and Festival Sites

  Temporary non-woven silt fences can be installed at outdoor event sites, concerts, and festivals. This minimizes soil erosion and sediment runoff in case of heavy rains.

How to Choose non woven silt fence

• Durability and Strength

  Assess the durability and strength of non-woven silt fence. Determine if it's robust enough to withstand the local climate and soil conditions at the project site. Ensure that the fence can resist tearing, collapsing, and damage from water flow.

• Quality of Fabric

  Choose a quality geotextile fabric for a non-woven silt fence. Look for high-quality fabrics that have high UV resistance, high tensile strength, and high filtration efficiency.

• Permits and Regulations

  Check local permits and regulations before purchasing non-woven silt fences in bulk. Certain locations have specific requirements for erosion control and sedimentation. Ensure compliance with local regulations to avoid legal issues.

• Size and Length

  Determine the size and length of the non-woven silt fence based on the construction site parameters. Consider factors like topography, project site size, and expected water flow when selecting the right size and length of silt fence.

• Price and Budget

  Price and budget play an important role when selecting a non-woven silt fence. Compare the prices of different types of silt fences and determine which falls within the allocated budget while meeting the required standards.

• Installation and Maintenance

  Consider the installation process and maintenance requirements for each type of non-woven silt fence. Some silt fences are more expensive to maintain and install than others. Opt for the one that meets the project requirements and is easy to install and maintain.

non woven silt fence Q&A

Q1: What is a non-woven silt fence?

A1: A non-woven silt fence is a temporary sediment control measure used in construction sites to filter water and prevent soil erosion. It's made from geotextile fabric, wooden stakes, and galvanized wire.

Q2: What are the types of non-woven silt fences?

A2: There are two types of non-woven silt fences: Type A and Type B. Type A is installed when there are less than 1.5 feet of anticipated static sediment head and no stormwater runoff. Type B is installed when there are more than 1.5 feet of anticipated static sediment head and stormwater runoff.

Q3: How effective are non-woven silt fences?

A3: Non-woven silt fences are very effective when installed and maintained properly. They act as a barrier to sediment-laden water, allowing clean water to flow while trapping soil and sediment particles.

Q4: How long does a non-woven silt fence last?

A4: Due to exposure to water and ultraviolet rays, a non-woven silt fence typically lasts between 6 and 12 months. However, its lifespan also depends on how well it has been maintained and the site conditions.

Q5: What are the disadvantages of silt fences?

A5: Although non-woven silt fences are effective in controlling sediment runoff, they have some disadvantages. For instance, they can clog easily when there is high sediment runoff, leading to reduced efficiency. They also require regular maintenance and monitoring to ensure they function properly.