Measurement and prediction of natural and anthropogenic sediment sources, St. John, U.S. Virgin Islands

Interactions of Forest Road, Forest Harvesting and Forest Ecosystems

“…Sediment delivered to streams from road sections leads to number of dramatic effects on water quality (Megahan 1974). On unsealed roads, road surface erosion is generally the dominant source of sediment (Ramos Scharrón and MacDonald, 2007). Road surface and ditch areas still continue to deliver sediment to the streams as long as the road is used.…”

Perda De Solo Em Estradas Rurais Em Área De Cultivo De Tabaco Na Bacia Do Arroio Boa Vista- Paraná

“…Dentre estes tipos de uso do solo, as estradas vêm se confi gurando com uma das mais importantes fontes de sedimento em bacia de drenagem, tornando-se foco de algumas pesquisas como: Sheridan & Noske (2007) ;Cerdà, 2007;Ramos-Scharrón & Macdonald (2007); Martinez-Zavala et al (2008); Jordán et al 2009;Thomaz et al (2011); Thomaz et al (2014). Ressalta-se, que nas pesquisas encontradas na literatura são raras aquelas que associam à perda de solo das estradas às atividades agrícolas ou ainda que individualizem a produção de sedimento em barranco e em leito de estrada.…”

Sustaining reservoir use through sediment trapping in NW Ethiopia

“…Sediment ponds are built within channels or at the edge of fields to trap sediment from concentrated runoff and thus prevent off-site sedimentation (Figure 3.5). Sediment ponds constructed within channels can also trap sediment resulting in stream bank erosion, which is a major source of sediment to downstream rivers and dams (Ramos-Scharrón & MacDonald, 2007). ).…”

“…Gully and river bank erosion has been observed to contribute significantly to overall catchment scale sedimentation Ramos-Scharrón & MacDonald, 2007;Keesstra et al, 2009a). To counter this issue, check dams are mostly constructed within gullies and channels to help prevent gully erosion and trap sediment (Figure 3.6).…”

“…Graded unpaved roads produce 5.7-580 t ha -1 y -1 of sediment, which was 40% higher than ungraded roads in St. John, U.S. Virgin Islands (Ramos-Scharrón & MacDonald, 2007). Hence, construction sites required ST measures to intercept runoff and trap sediment before discharging runoff into downstream water bodies.…”