Sentences with phrase «by upstream dams»

Not exact matches

Stearns told me that while the dam and canal are now preserved as a national historic landmark, the Concord River is so polluted by manufacturing plants upstream at Sudbury that his children would never think of fishing, swimming or boating in it.

Dams can prevent or impede fish passage and degrade the habitats upstream by inundating formerly free - flowing rivers, reducing water quality, and altering fish communities.

In work published last year, Wohl and her colleagues found that sediment upstream of active beaver dams in the park contained about 12 % carbon by weight, most of it locked in wood.

But the rapids classification is interesting because each rapid gets a classification based on also the water flow at any time because the flow of the Colorado River is determined by the water that's released from the Glen Canyon Dam which is a few miles upstream from where we put in at Lee's Ferry.

You will see all the scenic highlights of the Ord River system by joining Triple J Tours at 1130 and navigating 55 kilometres upstream to the base of the Lake Argyle dam wall before turning around and soaking it all up again on the return journey!

The level of water in the Oroville Dam has fallen by 52 feet, but that feat was largely accomplished by over-filing 9 upstream reservoirs.

After California Sea Grant identified that a flashboard dam was stopping endangered coho salmon from moving upstream, a recovery plan by the NOAA National Marine Fisheries Service billed it as the highest priority barrier for remediation in the Russian River.

A city on a fast - sinking river delta (and fast - sinking deltas, undermined by the pumping of groundwater and starved of sediment by dams upstream, are common Anthropocene environments) could spend millions of years buried and still, when eventually uncovered, reveal through its crushed structures and weird mixtures of materials that it is unlike anything else in the geological record.

Such waters are being threatened by several upstream dam projects in neighboring Turkey.