Quantcast

Latest River delta Stories

freshwater marsh vegetation
2014-08-27 03:00:52

Steve Hinnefeld, Indiana University Research by Indiana University geologists suggests that an intermediate amount of vegetation -- not too little and not too much -- is most effective at stabilizing freshwater river deltas. The study, "Optimum vegetation height and density for inorganic sedimentation in deltaic marshes," was published online Aug. 24 by Nature Geoscience. The findings may help guide restoration of river deltas, such as those near the mouth of the Mississippi River,...

Mississippi River Sediments Plentiful Enough To Rebuild Shrinking Delta
2014-04-21 12:58:29

Brett Smith for redOrbit.com - Your Universe Online While flood-control measures have kept the Mississippi River from disrupting commerce and transportation along the waterways of southern Louisiana, they have also reduced the amount of wetland-preserving sediment flowing into the river’s delta. However, a new study published in the journal Nature Geoscience reports encouraging news: the amount of sediment contained in the river is more than enough to rebuild the Mississippi’s...

Economical Solutions For Maintaining Critical Delta Environments
2013-12-10 08:47:46

Woods Hole Oceanographic Institution Millions of people across the world live or depend on deltas for their livelihoods. Formed at the lowest part of a river where its water flow slows and spreads into the sea, deltas are sediment-rich, biodiverse areas, a valuable source of seafood, fertile ground for agriculture, and host to ports important for transportation. At least half of the deltas around the world are so-called “wave dominated deltas” – open to the sea and under the...

2012-11-08 00:53:19

Rapid advances in the new and developing field of restoration sedimentology will be needed to protect the world's river deltas from an array of threats, Indiana University Bloomington geologist Douglas A. Edmonds writes in the journal Nature Geoscience. The commentary, published this week in the November issue, addresses the fact that land is disappearing from river deltas at alarming rates. And deltas are extraordinarily important: They are ecologically rich and productive, and they are...

Impact From Humans Felt On Black Sea Long Before Industrial Era
2012-09-04 14:44:23

When WHOI geologist Liviu Giosan first reconstructed the history of how the Danube River built its delta, he was presented with a puzzle. In the delta´s early stages of development, the river deposited its sediment within a protected bay. As the delta expanded onto the Black Sea shelf in the late Holocene and was exposed to greater waves and currents, rather than seeing the decline in sediment storage that he expected, Giosan found the opposite. The delta continued to grow. In fact,...

2012-03-29 12:27:08

Simultaneously attaining a reliable water supply for California and protecting and rehabilitating its Bay-Delta ecosystem cannot be realized until better planning can identify how trade-offs between these two goals will be managed when water is limited, says a new report from the National Research Council. Recent efforts have been ineffective in meeting these goals because management is distributed among many agencies and organizations, which hinders development and implementation of an...

2011-05-13 15:12:00

NOVATO, Calif., May 13, 2011 /PRNewswire/ -- In his most outrageous performance yet, Congressman Devin Nunes, the southern San Joaquin Valley Republican lawmaker who accuses environmentalists of being Communists and attacks water officials who negotiate environmental agreements as sell-outs, has introduced a new bill that would eliminate or weaken most protections for the collapsing Bay-Delta ecosystem. HR 1837, the San Joaquin Valley Reliability Act, introduced on May 11, would...

2011-02-15 15:16:00

SACRAMENTO, Calif., Feb. 15, 2011 /PRNewswire/ -- The Delta Stewardship Council released the first draft of its 50-year plan to revitalize the Sacramento-San Joaquin Delta. After reviewing the plan, Allen Short, the General Manager of the Modesto Irrigation District, has serious concerns. "Unfortunately the draft plan as released has yet to define several key components essential to the long-term balance of the Delta. The cost to water and electric rate payers throughout California...

2011-01-25 12:26:18

By adding information about the subsoil to an existing sedimentation and erosion model, researchers at TU Delft have obtained a clearer picture of how rivers and deltas develop over time. A better understanding of the interaction between the subsoil and flow processes in a river-delta system can play a key role in civil engineering (delta management), but also in geology (especially in the work of reservoir geologists). Nathanaël Geleynse et al. recently published on their...


Latest River delta Reference Libraries

River Delta
2013-04-18 22:36:25

A river delta is a landform that is created at the mouth of a river, where the river flows into an ocean, estuary, lake, sea, or reservoir. These deltas are built from the deposition of the sediment that is carried by the river as the flow exit’s the mouth of the river. Over a long period of time, this deposition constructs the distinctive geographic pattern of a river delta. The creation of a delta is made up of three core forms: the bottomset, topset, and foreset/frontset. Bottomset...

More Articles (1 articles) »
Word of the Day
omadhaun
  • A fool; a simpleton: a term of abuse common in Ireland and to a less extent in the Gaelic-speaking parts of Scotland.
This word is partly Irish in origin.