Sentences with phrase «supply of the sediment»

In fact, this nearly exact balancing between the supply of sediment and the amount of subsidence is probably a rare contingency»

But we have seen that a thick formation, fossiliferous throughout its entire thickness, can acc.umulate only during a period of subsidence; and to keep the depth approximately the same, which is necessary that the same marine species may live on the same space, the supply of sediment must nearly counterbalance the amount of subsidence.

We provide evidence that protecting parrotfish populations, and the habitats on which they depend, is likely to be vital to ensuring a continued supply of the sediment from which these Maldivian reef islands are built.»

In coastal protection, it can mean, for instance, artificially building beaches that absorb the power of storm waves, or encouraging the natural forces that raise and extend a coastline, including salt marsh, by ensuring a supply of sediment.

Radley says there is considerable uncertainty about how far the erosion of the Essex salt marshes may be due to a reduction in the local supply of sediment.

They found that the embankments that protect the land from the river and sea had also robbed it of fresh supplies of sediment: during the five decades of its existence, the polder had sunk by a full meter relative to the land outside the embankments because it was not being replenished.

Not exact matches

But this same movement of subsidence will tend to submerge the area whence the sediment is derived, and thus diminish the supply, whilst the downward movement continues.

Once the filter goes to work, you will lose the taste of all of that sediment, heavy metals, and chemicals found in most home's water supplies.

This reduction represents 69 percent of all sediments flowing out the Andes and 64 percent of the entire Amazon sediment supply and is expected to extend to the Amazon river main channel, impacting the entire central floodplain and delta region.

[Perry:] «If you take the parrot fish out of these systems you would basically be shutting down a very significant amount of the sort of supply chain for island - building sediment.»

«The sediment can have a wide range of effects on a lot of watersheds, many of which are headwater streams and important for water supply in the West.»

Some of the effects are related to erosional processes such as a decrease in sediment supply, changes in the intensity and frequency of extreme events (storms and cyclones, among others), and changes in sea levels and in the wave climate.

The bacteria living in these sediments were respiring the oxygen but at a slower rate than the supply of organic material dropping out of the water column, allowing these ancient deep marine sediments to remain oxygenated.

Microbial communities can subsist at depth in marine sediments without fresh supply of organic matter for millions of years.

«For the Mississippi, the river supplies a lot of sediment.

In the Mississippi River system, however, a series of dams on various upstream tributaries have reduced sediment supply to the delta, while levees on the lower part of the river have artificially channelized the flow, forcing sediments to be deposited beyond the delta in the deeper Gulf of Mexico.

The researchers hypothesize that a comet hit our planet at the beginning of the PETM, bringing with it its own supply of carbon — and vaporizing carbon - containing sediment here on Earth upon impact.

It is also possible for cold climates to increase chemical weathering in some ways, by lowering sea level to expose more land to erosion (though I'd guess this can also increase oxydation of C in sediments) and by supplying more sediments via glacial erosion for chemical weathering (of course, those sediments must make it to warmer conditions to make the process effective — downhill and downstream, or perhaps via pulsed ice ages -LRB-?)-RRB-.

His research claims that siphoning off a third of the water from the Han River's Danjiangkou reservoir, as the plan calls for, will raise the risk of floods, increase sediment and worsen water quality — hurting navigation and irrigation for local residents, and limiting supplies for industrial and municipal use.