TigerStream 3: Evaluation of Slash Mulch Berms in Sediment Barrier Applications. скачать в хорошем качестве

TigerStream 3: Evaluation of Slash Mulch Berms in Sediment Barrier Applications.

Welcome to another TigerStream Webinar. This month we are joined by Dr. Brian Roche with Auburn University. Completion of this webinar earns you one PDH. After completing the video, visit aub.ie/tigerstreampdh to receive your certificate. ABSTRACT: Construction activities are a leading cause of sediment pollution in waterways, which can harm aquatic ecosystems by increasing turbidity and sedimentation. Increased turbidity can prevent vegetation from receiving sunlight and be detrimental to aquatic wildlife; sedimentation can reduce stream capacity, which increases the risk of flooding, can harm fish spawning rates, and destroy habitats. Waterways and natural areas are protected from sediment through the installation and maintenance of sediment barrier practices that capture sediment through sedimentation and, to a lesser extent, filtration. The most common sediment barrier practice is silt fence; however, this practice is composed primarily of synthetic materials, such as plastics and metals, that must be landfilled after removal or can break down and be harmful to ecosystems if left on site. One alternative sediment barrier practice that is underused and has not been evaluated is slash mulch berms, which are composed of chipped and shredded woody material that is often a byproduct of clearing land that can be left on-site after construction. Various slash mulch berm installations, including multiple sizes at different compactions, were evaluated for performance at the Auburn University- Stormwater Research facility to determine if slash mulch berms are suitable for use as sediment barrier practices. Berms were subjected to simulated stormwater runoff events to assess their ability to treat sediment-laden sheet flow that is representative of the peak 30 min. of a 2-yr, 24-hr storm event; analyzed parameters included sediment capture, structural performance, impoundment potential, flow-through rates, and water quality improvements.