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Washington State University (2007)

Evaluating a wood-strand material for wind erosion control and air quality protection

Copeland, Natalie Suzanne

Titre : Evaluating a wood-strand material for wind erosion control and air quality protection

Auteur : Copeland, Natalie Suzanne

Université de soutenance : Washington State University

Grade : Master of Science (MS) 2007

Résumé
Wind erosion is a widespread problem in much of the western United States due to arid conditions and persistent winds. Fugitive dust from eroding land poses a risk to both environmental quality and human health. The Clean Air Act, established in 1971, was revised in 1987 to include ambient air quality standards for PM10 (particulate matter with mean aerodynamic diameter ? 10 ?m) in the atmosphere. Agricultural straw has been widely used for erosion control, but there are numerous drawbacks to its use. Straw is a lightweight material and lacks stability during high-wind events. Also, there is growing concern over the introduction of noxious weeds to wildlands, chemical residues from pesticides, and health risks associated with dust particles liberated from the shattering of straw elements during the application process. A wood-based product has recently been developed as an alternative to agricultural straw for erosion control. The purpose of this study was to evaluate the efficacy of the wood-strand material in controlling wind erosion and fugitive dust emissions. A series of wind tunnel tests were conducted to compare wood strands to agricultural straw and bare soil in terms of total iv sediment loss, PM10 vertical flux, and PM10 loss. Results indicated that the types of wood strands tested are stable at wind speeds of up to 18 m s ?1, while wheat straw is only stable at speeds of up to 6.5 m s ?1. Wood strands reduced total sediment loss and PM10 emissions by 90% as compared to bare soil. Wheat straw reduced total sediment loss and PM10 emissions by up to 40% and 75%, respectively, as compared to bare soil. v

Mots clés : wind erosion dust control composite materials

Présentation : Open Thesis

Page publiée le 8 octobre 2016, mise à jour le 16 janvier 2019