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Posts tagged Susquehanna River

Snowfall in USA Highlights Susquehanna and Delaware Rivers – March 4th, 2011

39.6N 75.2W

March 4th, 2011 Category: Image of the day, Rivers

USA - February 10th, 2011

Snow dusts the northeastern United States of America and highlights the ridges of the Appalachian Mountains (upper left). The light color of the snow also makes it easy to spot rivers crossing the landscape, including the Susquehanna River (center) and the Delaware River (right of the former)

In the thumbnail image, parts of New Jersey, Pennsylvania, Delaware and Maryland are snow covered, while Virginia is mostly snow free. The full image stretches northward across New York, Connecticut, Rhode Island and Massachusetts, all of which are blanketed in snow.

Contours of Chesapeake Bay Coastline, USA – May 30th, 2009

37.5N 76.1W

May 30th, 2009 Category: Fires, Image of the day, Rivers

Chesapeake Bay, USA - May 21st, 2009

Chesapeake Bay, USA - May 21st, 2009

The Chesapeake Bay (middle) is the largest estuary in the United States. It lies off the Atlantic Ocean, surrounded by Maryland (above) and Virginia (below). Parts of the states of Delaware and New Jersey are also visible in the upper right quadrant. Also of note is a plume of smoke at the lower left, from a fire in Virginia.

The Chesapeake Bay stretches about 200 miles (300 km) from the Susquehanna River in the north to the Atlantic Ocean in the south. The Chesapeake Bay is the ria, or drowned valley, of the Susquehanna, meaning that it was where the river flowed when the sea level was lower.

Much of the bay is quite shallow. At the point where the Susquehanna River flows into the bay, the average depth is 30 feet (9 m), although this soon diminishes to an average of 10 feet (3 m) from the city of Havre de Grace for about 35 miles (56 km), to just north of Annapolis.

In this image, sun glint makes the water of the bay appear whitish, and thus highlights the contours of the coastline. However, despite the glint it is still possible to observe some greenish sediments flowing into the bay.

Since the bay is an estuary, it has fresh water and brackish water. Brackish water has three salinity zones — oligohaline (little salt, freshwater species able to survive), mesohaline (medium amount of salt), and polyhaline (very salty, sometimes as much as sea water).

In the Chesapeake Bay, the fresh water zone runs from the mouth of the Susquehanna River to north Baltimore.  The mesohaline zone reaches from the Bay Bridge to the mouth of the Rapahannock River, and the salty polyhaline zone runs from the mouth of the Rappahannock River to the mouth of the bay.

Chesapeake Bay and Albemarle Sound Estuaries – March 25th, 2009

March 25th, 2009 Category: Image of the day, Rivers

USA - March 19th, 2009

USA - March 19th, 2009

Two large estuaries can be seen here on the East Coast of the United States of America. To the North is the Chesapeake Bay, the largest estuary in the USA; to the South is the Albemarle Sound. Sediments can be seen flowing into the estuaries from their respective tributaries.

The Chesapeake Bay lies off the Atlantic Ocean, surrounded by Maryland (top) and Virginia (center).  More than 150 rivers and streams drain into it.

The Chesapeake Bay is about 200 miles (300 km) long, from the Susquehanna River in the north to the Atlantic Ocean in the south. At its narrowest point, the Bay is 2.8 miles (4.5 km) wide; at its widest point, just south of the mouth of the Potomac River, it is 30 miles (50 km) wide.

Total shoreline for the Bay and its tributaries is 11,684 miles (18,804 km), and the surface area of the bay and its major tributaries is 4479 sqmi.

Albemarle Sound is a large estuary on the coast of North Carolina (bottom) located at the confluence of a group of rivers, including the Chowan and Roanoke.

It is separated from the Atlantic Ocean by the Outer Banks, a long barrier peninsula. Much of the water in the Albemarle Sound is brackish or fresh, as opposed to the saltwater of the ocean, as a result of river water pouring into the sound.