Geography ISPL

Saturday, June 21, 2008

Reflection

While doing this assignment, I have learnt alot of things like the length of the Mississippi river ; different uses of the river ; and also many other things. I responded with wonderment & awe when i looked at the delta switching pictures and also the bridge which collaspe in the Mississippi river. I have also used HOM values like Remain Open to Continuous Learning and Gather Data through All Senses by searching online for more information about the Mississippi river and learning all the information that I have found for future uses.

Thanks for viewing :D

Friday, June 20, 2008

Physical features along the river

Drainage Basin :

The Mississippi and its tributaries drain almost all the plains between the Appalachian Mountains and the Rocky Mountains. The Mississippi River has the third largest drainage basin in the world, exceeded in size only by the watersheds of the Amazon and Congo Rivers.

It drains 41 percent of the 48 contiguous states of the United States. The basin covers more than 1,245,000 square miles, includes all or parts of 31 states and two Canadian provinces, and roughly resembles a funnel which has its spout at the Gulf of Mexico. Its discharge, which averages 16,800 cu m per second (593,000 cu ft per second), is the sixth largest in the world.

Waters from as far east as New York and as far west as Montana contribute to flows in the lower river. This area encompasses the nation's most productive agricultural and industrial regions. The drainage basin empties into the Gulf of Mexico.


The Mississippi River Drainage Basin, with MR&T Project area (in pink)
















Picture of the drainage basin
















Main Stem Levees :

The Mississippi River levees are designed to protect the alluvial valley against the project flood by confining flow to the leveed channel, except where it enters the natural blackwater areas or is diverted purposely into the floodway areas.

The main stem levee system, comprised of levees, floodwalls, and various control structures, is 2,203 miles long. Some 1,607 miles lie along the Mississippi River itself and 596 miles lie along the south banks of the Arkansas and Red rivers and in the Atchafalaya Basin.

The levees are constructed by the federal government and are maintained by local interests, except for government assistance as necessary during major floods. Periodic inspections of maintenance are made by personnel from the U.S. Army Corps of Engineers and from local levee and drainage districts as it is essential that the levees be maintained in good condition for their proper functioning in the flood control plan.


Old levees of Mississippi river












Delta :
The radar image below is the Mississippi Delta taken from the Space Shuttle Endeavor on Oct. 2, 1994 shows an area of 63 by 43 km. where the Mississippi (largest river in North America) flows south and enters the Gulf of Mexico. North is toward the upper right of the view, whose center is at 29.3 North Latitude, and 89.28 West Longitude.

As the river meets the Gulf of Mexico, it loses velocity and dumps its sediment in an expanding fan-shaped, or roughly triangular-shaped zone called a delta (named for the Greek letter shaped like a triangle). The specific form at the outer mouth of the Mississippi where its distributaries spread out and sediments expand into the sea is also sometimes known as a "bird's foot delta." The river's currents are notably strong to create this deltaic configuration. The accumulation of sediment is ever-changing, and the Mississippi's primary channel shifts frequently around in the delta.

The current main shipping channel is the vertical stripe at left center, which contains numerous ships visible as white spots. The surrounding areas consist of coastal mudflats, marshes, and tidal pools.


The radar photo



















A brief description of the delta



















A photo of the mississippi river delta












Three decades of change in Mississippi river delta







Waterfalls :

The East Mississppi river has a few waterfalls. The following are two examples.
Crabtree Falls is located in the George Washington National Forest in Nelson County, Virginia and is the tallest waterfall in the United States east of the Mississippi River.

The name of the waterfall is thought to have come from William Crabtree, who settled in this part of Virginia in 1777. The waterfall is often credited with being 1,200 feet high (356 meters), but is likely closer to 1,000 feet (305 meters). The cascade with a 400 foot drop also gives Crabtree Falls the title of tallest vertical drop in a waterfall east of the Mississippi River.

The Crabtree waterfall
















Glassmine Falls is an ephemeral waterfall in Buncombe County, North Carolina, on Glassmine Branch, near Dillingham, North Carolina.

When it flows, the falls slides down the rock face of Blackstop Knob Mountain down to the North Fork Swannanoa River. The flow is not constant and can sometimes nearly dry up completely. It is most visible after heavy rains, which can be at any time during the year.

A sign at the overlook for the falls claims that the falls is over 800 ft (247m) high. At this height, Glassmine Falls is one of the tallest waterfalls east of the Mississippi River. It also have coordinates of 35°43′45″N 82°19′48″W / 35.729141, -82.329951.

The Glassmine Falls













Uses of the river

Commercial uses :

A clear channel is needed for the barges(a long, large, usually flatbottom boat for transporting freight that is generally unpowered and towed or pushed by other craft.) and other vessels that make the mainstem Mississippi one of the great commercial waterways of the world.


Barge on Mississippi river

















source : http://www.flickr.com/photos/flipp3r2008/2547034903/


Wildlife :

The Upper Mississippi River National Wildlife and Fish Refuge is a 240,000 acre, 261 river mile long National Wildlife Refuge located in and along the Upper Mississippi River.

It runs from Wabasha, Minnesota in the north, to Rock Island, Illinois on the south.
In its northern portion, it is in the Driftless Area, a region of North America that escaped being ice-covered during the last ice age. Certain parcels contained within the refuge were later transferred in the Driftless Area National Wildlife Refuge.


It has many wooded islands, sloughs, and hardwood forests. The unique wildlife found here includes the canvasback duck, tundra swan, white-tailed deer, and muskrat. Recreational activities include boating, hunting, fishing, and swimming.


United States Fish and Wildlife Service





















source : http://en.wikipedia.org/wiki/Upper_Mississippi_River_National_Wildlife_and_Fish_Refuge

The Mississippi River and its valley also support many kinds of animals and plants including freshwater fishes, birds, deer, raccoons, otters, mink, and a variety of forest trees. But pollution from agriculture and industry seriously threaten the life of the Mississippi.

source : http://www.42explore2.com/missriv.htm


The Mississippi and transport :

The Mississippi became an important route for transport and trade early in the 19th century. It is navigable from the Falls of St. Anthony in Minneapolis to its mouth. Cargo ships, barges and even paddle steamers transport both cargo (grain, paper, cotton, iron and steel) and people along the Mississippi. Cities and industries have grown up along the banks of the Mississippi because it is a natural waterway fro transporting goods.


Agriculture :

It is a source of water for irrigation which is why agriculture is important along the banks of the Mississippi. The Mississippi has a particularly fertile floodplain which has shrunk by 10% over the last 100 years because people are trying to control the river to prevent it from flooding. The floodplain doesn't receive mud and silt deposits any more.

The Upper Mississippi River Basin (UMRB) have the greatest amount of artificially drained soil, the highest percentage of total land in agriculture (feed grains and soybeans in the north and cotton, groundnuts, and rice) and the highest use of nitrogen fertilizers in the nation. The region has abundant precipitation most years for crop growth and only rarely suffers from major yield declines because of drought.


source : http://www.mindfully.org/Farm/Nitrogen-Upper-Mississippi-River.htm and http://www.kented.org.uk/ngfl/subjects/geography/rivers/FeatureArticles/mississippi.htm

Social and political background of the river

History:
There are records of human habitation along the Mississippi river that date back more than five thousand years. Four thousand years ago, American Indians in the Lower Mississippi Valley began establishing communities with large, elaborate earthen architecture. Much later around 1000 A.D., larger and more elaborate complexes of mounds were constructed by a culture referred to as Mississippian. Typically, these towns contained anywhere from 1 to 20 mounds, which often were used as platforms for temples or the residence of leaders.

The Ojibway Indians of northern Minnesota called it "Messipi" or "Big River," and it was also known as the "Mee-zee-see-bee" or the "Father of Waters." European explorers who mapped all the river's channels and backwater areas called it a "gathering of waters." The Native Americans of different tribes who originally lived near the Mississippi and used it for canoe transportation, hunting and fishing often viewed the great river as the center of the universe.



Delta Switching :

The delta of lower Mississippi River has shifted its final course to the mouth of the Gulf of Mexico every thousand years or so due to the natural process called the delta switching. This occurs because the deposits of silt and sediment begin to clog its channel, raising the river's level and causing it to eventually find a steeper, more direct route to the Gulf of Mexico.

The abandoned distributary diminishes in volume and forms what are known as bayous. This process has, over the past 5,000 years, caused the coastline of south Louisiana to advance toward the Gulf from 15 to 50 mi (25 to 80 km).

The currently active delta lobe is called the Birdfoot Delta, after its shape, or the Balize Delta, after La Balize, Louisiana, the first French settlement at the mouth of the Mississippi

Sequence of NASA MODIS images showing the outflow of fresh water from the Mississippi (arrows) into the Gulf of Mexico (2004)
























Bird's foot Delta












Changes in the courses of the river:

Other changes in the course of the river have occurred because of earthquakes along the New Madrid Fault Zone, which lies near the cities of Memphis and St. Louis. There have been three earthquakes in 1811 and 1812, estimated at approximately 8 on the Richter Scale, were said to have temporarily reversed the course of the Mississippi. These earthquakes also created Reelfoot Lake in Tennessee from the altered landscape near the river. The faulting is related to an aulacogen (geologic term for a failed rift) that formed at the same time as the Gulf of Mexico.


source : http://www.sheppardsoftware.com/usaweb/factfile/Unique-facts-USA3.htm



The name of the river :
The word Mississippi comes from the Ojibwe name for the river, "Messipi", which means "big river," or from the Algonquin Missi Sepe, "great river," literally, "father of waters." On May 8, 1541 Hernando de Soto became the first recorded white man to reach the Mississippi River, which he called "Rio de Espiritu Santo" (River of the Holy Spirit). French explorers Louis Joliet and Jacques Marquette began exploring the Mississippi, which they knew by the Sioux name "Ne Tongo" (which, like the Ojibwe name, means "big river"), on May 17, 1673. In 1682, René Robert Cavelier, Sieur de La Salle and Henri de Tonty claimed the entire Mississippi River Valley for France, calling it Louisiana, for King Louis XIV.


Hernando De Soto approaching the Mississippi River (1849)













War :
In 1815, America defeated Britain at the Battle of New Orleans, part of the War of 1812.
The river played a decisive role in the American Civil War. The Union's Vicksburg Campaign called for Union control of the lower Mississippi River. The Union victory at the Battle of Vicksburg in Warren County, Mississippi in 1863 was pivotal to the Union's final victory of the Civil War.


Battle of Vicksburg (ca. 1888)















21st Century :

In 2002, Slovenian long-distance swimmer Martin Strel swam the entire length of the river, from Minnesota to Louisiana, over the course of 68 days.

In 2005, the Source to Sea Expedition paddled the Mississippi and Atchafalaya rivers to benefit the Audubon Society's Upper Mississippi River Campaign.

On August 1, 2007, the I-35W Mississippi River bridge in Minneapolis, Minnesota collapsed during the evening rush hour.

Also in 2007, it is expected that more than 150 pleasure boats will travel down the river from Grafton to Cairo while participating in the Great loop, which is circumnavigation of Eastern North America by water.


Campsite at the river in Arkansas (2007)










Description of Mississippi river

Source and the mouth of the river :

The source of the Mississippi River is Lake Itasca, 1,475 ft (450 m) above sea level in Itasca State Park located in Clearwater County, Minnesota, and has a coordinates of 47°14′23″N 95°12′27″W. The name "Itasca" is a combination of the last four letters of the Latin word for truth (veritas) and the first two letters of the Latin word for head (caput). The river mouth of Mississippi river is in the Gulf of Mexico, has 0 ft (0 m) of elevation and a coordinates of 29°09′13″N 89°15′03″W.


Itasca Lake, Minnesota(June 25, 1997) ; beginning of Mississippi river



















source : http://www.flickr.com/photos/worldwidewandering/372176213/


Mississippi river delta



















source : http://en.wikipedia.org/wiki/Image:Mississippi_River_Delta_and_Sediment_Plume.jpg


Gulf of Mexico in 3D





















source : http://en.wikipedia.org/wiki/Image:GulfofMexico3D.png




Tributaries of the river :

The Mississippi river is joined by many tributaries like the Minnesota River in the Twin Cities, the Wisconsin River in Prairie du Chien, Wisconsin, the St. Croix River, (Wisconsin), the Iowa River near the town of Wapello, Iowa, the Skunk River five miles south of Burlington, Iowa, the Des Moines River in Keokuk, Iowa, the Illinois River and the Missouri River near St. Louis, Missouri, which measures up to 2,341 mi (3,767km) and by the Ohio River at Cairo, Illinois.


Some tributaries of Mississippi river

















source : http://www.kented.org.uk/ngfl/subjects/geography/rivers/PhotoGallery/tributary2.htm



Across the Wisconsin river entering near Prairie du chien

















source : http://www.flickr.com/photos/abobslifeinpictures/207312635/


Missouri River near St. Charles

















source : http://www.flickr.com/photos/10357196@N03/980300160/




Missouri River near St. Louis





















source : http://www.flickr.com/photos/funguyindiana/924589761/

Cities that the river flowed through :

The Mississippi river also flows through cities like Bemidji, Minnesota ; Little Falls, Minnesota ; Saint Cloud, Minnesota ; Minneapolis, Minnesota ; St. Paul, Minnesota ; Winona, Minnesota ; La Crosse, Wisconsin ; Dubuque, Iowa ; Bettendorf, Iowa ; Davenport, Iowa ; Rock Island, Illinois ; Moline, Illinois ; Muscatine, Iowa ; Burlington, Iowa ; Fort Madison, Iowa ; Nauvoo, Illinois ; Keokuk, Iowa ; Quincy, Illinois ; Hannibal, Missouri ; St. Louis, Missouri ; Ste. Genevieve, Missouri ; Cape Girardeau, Missouri ; Cairo, Illinois ; New Madrid, Missouri ; Reverie, Tennessee ; Memphis, Tennessee ; Tunica, Mississippi ; Helena-West Helena, Arkansas ; Greenville, Mississippi ; Vicksburg, Mississippi ; Natchez, Mississippi ; Baton Rouge, Louisiana ; New Orleans, Louisiana ; Pilottown, Louisiana ; La Balize, Louisiana (historical).


Community of boathouses on the Mississippi River in Winona, MN (2006)

















source : http://en.wikipedia.org/wiki/Mississippi_River#Cities_along_the_river


In Minnesota, the Mississippi River runs through the Twin Cities (2007)
















source : http://en.wikipedia.org/wiki/Mississippi_River#Cities_along_the_river



The Mississippi River just north of St. Louis (2005)











source : http://en.wikipedia.org/wiki/Mississippi_River#Cities_along_the_river

Location

This is the Mississippi River and the following is a short description about this river.

The Mississippi river is located in USA, the largest river of North America, the second longest river in the United States, the fourth longest in the world, and also have an average discharge of 572,000 cu ft/s (16,200 m³/s), it is the tenth largest river. It has a length of approximately 6020km, also have major tributaries draining an area of approximately 1,200,000 square miles. The following are some pictures about Mississippi river.

Map of Mississippi river












Part of Mississippi river