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Sep
28
2009
Artificial meandering river provides insight into stream restoration
Ordering viagra, Scientists have figured out how to make a river meander in the lab, according to a report in the Proceedings of the National Academy of Sciences. Viagra sale, The research could help determine the best strategies for stream restoration.
The team carved an artificial stream bed with one bend into a 17-meter-long basin filled with sand. They planted alfalfa sprouts on the sides to strengthen the banks, viagra farmacia a buon mercato, Comprare viagra sconto, then ran water through the channel for 136 hours. By the end, Om viagra online, Kjøpe viagra, the river had developed five bends and appeared to function like a natural meandering stream.
One key element was the use of sand to plug small channels along the sides of the river, the authors say, Michigan MI Mich. . Koop korting viagra, This goes against a common practice in stream restoration projects, which often aim to eliminate fine sediment, ordering viagra online. Maintaining stream bank strength with vegetation was also critical, the team notes.
Now that scientists have a working lab version of a meandering river, they can test different stream restoration techniques and build computational models of the process, says lead author Christian Braudrick, ordering viagra. Acheter viagra, Researchers could then use the models to predict how streams will change over the course of decades, rather than just a few years, viagra without a prescription. Ordering viagra without prescription, – Roberta Kwok
Source: Braudrick, C., order viagra online cheap, Order viagra no prescription, Dietrich, W., kjøpe billig viagra, Tennessee TN Tenn. , Leverich, G., cheap viagra no prescription, Comprar viagra, & Sklar, L, South Carolina SC S.C. . Buy viagra cheap, (2009). Experimental evidence for the conditions necessary to sustain meandering in coarse bedded rivers Proceedings of the National Academy of Sciences: 10.1073/pnas.0909417106
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