Low-water Crossings for Livestock and Equipment: Planning for Aquatic Organism Passage
10.5 هزار بار بازدید -
12 سال پیش
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Presented by Kale Gullett, Fisheries
Presented by Kale Gullett, Fisheries Biologist, USDA NRCS East National Technology Support Center
Low-water crossings on low-volume and farm access roads are a common feature on many working lands. While intended to serve as safe stream crossings for both equipment and livestock, they can present construction and maintenance problems, often alter channel form and function, and may challenge up- and downstream passage for migratory aquatic organisms. As desirable alternatives to culverts and bridges, low-water crossings can also offer environmental and operational advantages to landowners on low-volume and private roads and trails. This webinar 1) reviews the ecological and geomorphic effects of low-water crossings in stream environments, 2) presents guidance for selecting structures that minimize disruption of channel processes and habitats, 3) summarizes basic design parameters and requirements, and 4) presents selected examples that illustrate performance, problems and advantages of different types of low-water crossings.
Low-water crossings on low-volume and farm access roads are a common feature on many working lands. While intended to serve as safe stream crossings for both equipment and livestock, they can present construction and maintenance problems, often alter channel form and function, and may challenge up- and downstream passage for migratory aquatic organisms. As desirable alternatives to culverts and bridges, low-water crossings can also offer environmental and operational advantages to landowners on low-volume and private roads and trails. This webinar 1) reviews the ecological and geomorphic effects of low-water crossings in stream environments, 2) presents guidance for selecting structures that minimize disruption of channel processes and habitats, 3) summarizes basic design parameters and requirements, and 4) presents selected examples that illustrate performance, problems and advantages of different types of low-water crossings.
12 سال پیش
در تاریخ 1391/06/22 منتشر شده
است.
10,522
بـار بازدید شده