Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A bioengineering approach to upgrading sediment ponds
Sediment storage ponds constructed to capture sediment and protect watersheds during mining and reclamation may be incorporated into post-mining land-use strategies to enhance wildlife habitat or provide a water source for livestock. Westmoreland Resources Inc. designed Sediment Pond 20 at the Absaloka Mine east of Hardin, Montana, with a flow-through culvert spillway and rock-armored energy dissipater to safely carry flows associated with a 25-year storm event. We developed a design that uses the entire embankment surface as the spillway. In the event of a discharge, the entire dam would be overtopped with a shallow flow. By reinforcing the embankment surface with a turf reinforcement mat (TRM) and native vegetation, we were able to ensure that any overtopping flow would be in the form of sheet flow. The overtopping event would be easier to model and would provide a high safety factor for the embankment at the design flow. We selected North American Green C350. In addition to its strong synthetic matrix, this product has a layer of coir fibers that retains soil moisture, thus aiding in seed germination and seedling establishment. Coir degrades slowly and mechanically, having minimal impact on the availability of soil nutrients. Coir, which is loose, not woven, does not contribute to the product's strength, so the product is not compromised after the coir degrades. Thus, the product combines a long-term degradable natural fiber with a permanent TRM.
A bioengineering approach to upgrading sediment ponds
Sediment storage ponds constructed to capture sediment and protect watersheds during mining and reclamation may be incorporated into post-mining land-use strategies to enhance wildlife habitat or provide a water source for livestock. Westmoreland Resources Inc. designed Sediment Pond 20 at the Absaloka Mine east of Hardin, Montana, with a flow-through culvert spillway and rock-armored energy dissipater to safely carry flows associated with a 25-year storm event. We developed a design that uses the entire embankment surface as the spillway. In the event of a discharge, the entire dam would be overtopped with a shallow flow. By reinforcing the embankment surface with a turf reinforcement mat (TRM) and native vegetation, we were able to ensure that any overtopping flow would be in the form of sheet flow. The overtopping event would be easier to model and would provide a high safety factor for the embankment at the design flow. We selected North American Green C350. In addition to its strong synthetic matrix, this product has a layer of coir fibers that retains soil moisture, thus aiding in seed germination and seedling establishment. Coir degrades slowly and mechanically, having minimal impact on the availability of soil nutrients. Coir, which is loose, not woven, does not contribute to the product's strength, so the product is not compromised after the coir degrades. Thus, the product combines a long-term degradable natural fiber with a permanent TRM.
A bioengineering approach to upgrading sediment ponds
Ein biotechnischer Ansatz zur Erhöhung des Nutzwertes von Absetzteichen
Parker, T. (Autor:in) / Myran, D.D. (Autor:in)
Geotechnical Fabrics Report ; 19 ; 36-43
2001
8 Seiten, 3 Bilder, 2 Tabellen, 9 Quellen
Aufsatz (Zeitschrift)
Englisch
Geotextil , Fasermatte , Bodenverfestigung , Rasen , Kokosfaser , Keimen , biologische Abbaubarkeit , Biotechnik , Abwasserkanal , künstlicher See , Bergbau , Rekultivierung , Begrünung , Dammbau , Absetzbecken
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