Earth Snapshot RSS Feed Twitter
 
 
 
 

Posts tagged Salt Marshes

Philadelphia and Delaware Bay in Northeastern USA

39.9N 75.1W

January 18th, 2012 Category: Rivers, Wetlands

USA - January 5th, 2012

The bright white area in the upper part of this orthorectified wide-swath ASAR image is Philadelphia, the largest city in the Commonwealth of Pennsylvania. The city is located in the Northeastern United States along the Delaware and Schuylkill rivers. It is the fifth-most-populous city in the United States, with a population of 1,526,006 as of the 2010 U.S. Census.

According to the United States Census Bureau, the city has a total area of 142.6 square miles (369.3 km2), of which 135.1 square miles (349.9 km2) is land and 7.6 square miles (19.7 km2), or 5.29%, is water. Bodies of water include the Delaware and Schuylkill Rivers, and Cobbs, Wissahickon, and Pennypack Creeks. The lowest point is sea level, while the highest point is in Chestnut Hill, at approximately 445 feet (136 m) above sea level (near the intersection of Germantown Avenue and Bethlehem Pike).

Visible to the south of the city is Delaware Bay, a major estuary outlet of the Delaware River on the Northeast seaboard of the United States whose fresh water mixes for many miles with the waters of the Atlantic Ocean. It has an area of 782 square miles. The bay is bordered by the State of New Jersey and the State of Delaware. The shores of the bay are largely composed of salt marshes and mud flats, which appear white in this image, with only small communities inhabiting the shore of the lower bay.

Eighty Mile Beach and Nearby Salt Marshes, Western Australia

19.6S 121.0E

May 9th, 2010 Category: Snapshots

Australia - March 5th, 2010

Australia - March 5th, 2010

Eighty Mile Beach is the coastal edge of the arid, sedimentary Great Sandy Desert and the Canning Basin, in northwestern Western Australia, bordering the Indian Ocean. Extending in a curve northeast from Cape Keraudren (east of the De Grey River mouth) to Cape Bossut, it is about 85 miles (140 km) long, hence its name.

The beach, generally low and sandy but with an expanse of dunes in the area around Anna Plains, experiences a tidal range as great as 28 feet (9 m). It is bordered with salt and samphire (plant) marshes that extend inland. Here, the beach appears as a bright white line along the coast, while the marshy region is darker in color although still light in comparison with the rusty red terrain further inland.

Oil Continues to Spread in Gulf of Mexico

28.8N 88.5W

May 3rd, 2010 Category: Environmental Disasters

Oil Spill (Multispectral/Radar Composite), Gulf of Mexico - May 2nd, 2010

Oil Spill (Multispectral/Radar Composite), Gulf of Mexico - May 2nd, 2010

Oil Spill Detail (Mutispectral/Radar Composite)

Oil Spill Detail (Mutispectral/Radar Composite)

Oil Spill Detail (Radar Image)

Oil Spill Detail (Radar Image)

As President Obama traveled to Louisiana on Sunday for a first-hand briefing on the Gulf of Mexico oil spill, federal officials in Washington said they were putting their hopes on drilling a parallel relief well to plug the unabated gusher. Drilling such a well could take three months, the NY Times reports.

The National Oceanic and Atmospheric Administration on Sunday restricted fishing for at least 10 days in waters most affected by the oil spill, largely between Louisiana state waters at the mouth of the Mississippi River to waters off Florida’s Pensacola Bay.

The slick, emanating from a pipe 50 miles offshore, was creeping into Louisiana’s fragile coastal wetlands as strong winds and rough waters hampered cleanup efforts. Oil could hit the shores of Alabama and Mississippi on Monday. Here, the slick can be seen spreading towards the coasts from the image center.

The environmental disaster was set off by an explosion on April 20 at the Deepwater Horizon rig in which 11 workers were killed. Two days later, the rig sank, leading to the first visible signs of a spill.

The objective of drilling a relief well parallel to the original rig would be to pour cement into the damaged well and plug it. Efforts to turn off the ruptured well by using remotely operated underwater vehicles working a mile below the surface have failed so far.

Meanwhile, The Associated Press reported that offshoots from the spill had made their way into South Pass, an important channel through the salt marshes of Southeastern Louisiana that is a breeding ground for crabs oysters, shrimp and redfish sold by a number of small seafood businesses dependent on healthy marshland for their livelihood.

There was concern that if the spill is not plugged, oil could seep into the Gulf Stream, the current that warms seawater and influences the climate in places as remote as Newfoundland and Europe. If that happens, slicks of oil could travel around the thumb-like tip of Florida and make it way to the eastern beaches.

About Us

Earth Observation

Organisations

Archive

September 2019
M T W T F S S
« Mar    
 1
2345678
9101112131415
16171819202122
23242526272829
30  

Categories


Bulletin Board


Featured Posts

Information

37


Take Action

Widgets