Monofilament woven geotextile and slit film geotextile are two types of geotextile fabrics that are used for different purposes. Monofilament woven geotextile is made from polypropylene fibers that are woven together to form a strong, stable fabric. It is typically used in applications where a high level of tensile strength is required, such as in road construction or reinforcing retaining walls. Slit film geotextile is made from polyethylene or polypropylene film that has been cut into thin strips or "slits." It is a less durable type of geotextile. It is often used in applications where a lower level of tensile strength is sufficient, such as in drainage systems or as a separation layer between different soil types.

To select the proper woven geotextile for a given application, the following design approach can be followed: Define the application: Identify the purpose of the geotextile, such as soil erosion control, retaining wall reinforcement, or drainage. Determine the filter requirements: Based on the specific characteristics of the soil, drainage material, and flow conditions, determine the appropriate retention or permeability criteria for the geotextile. Select the geotextile: Based on the filter requirements and the specific characteristics of the woven geotextile, such as its tensile strength and permeability, choose a geotextile that is suitable for the application. It is important to note that the design approach and criteria for selecting a woven geotextile may vary depending on the specific requirements of the application and local regulations. It is always advisable to consult a geotechnical engineer or other qualified professional when designing a geotextile project.

In general, permittivity and transmissivity are related, but they are not the same thing. Permittivity describes the intrinsic ability of a material to allow the flow of fluids or gases, while transmissivity describes the ability of a material or system to transmit fluids or gases under specific conditions.

Nonwoven geotextiles have higher elongation properties compared to woven geotextiles. Elongation refers to the ability of a material to stretch or deform under load. Nonwoven geotextiles usually have elongation values above 50%, while woven geotextiles usually have elongation values between 5% and 25%. This means that nonwoven geotextiles are more flexible and can stretch more under load than woven geotextiles. The elongation properties of a geotextile can be significant in certain situations, as it can affect how well the material conforms to the shape of the soil or other substrate it is used on. Nonwoven geotextiles with high elongation may be more appropriate for use on uneven or irregular surfaces, while woven geotextiles with lower elongation may be more suitable for use on flat or stable surfaces. When selecting a geotextile material for a specific application, it is essential to consider the elongation properties of the material, as well as other factors such as tensile strength, permeability, and weight. This will help ensure that the most suitable material is chosen for the job.