Essays Tagged: "Sediment"

Water Biomes

g the shallow edges of lakes andslow-moving rivers, forming when ponds and lakes become filled with sediment. Saltmarshes occur on coastal tidal flats. Inland salt marshes occupy the edges of lakes. T ... of lakes. Theyaffect the supply of nutrients, the movement of water, and the type and deposition ofsediment.Salt marshes are best developed on the Atlantic coasts of North America andEurope. In easte ...

(3 pages) 79 0 3.6 Dec/1996

Subjects: Science Essays > Environmental Science

Gold mining Techniques

l group.First of all, panning was a simple method but required a lot of skill. It worked by loading sediment onto the washing device which had a sieve(strain), and moving the pan to and fro until the ... lected. Hargraves and his associates used the tin panning dish to separate the gold grains from the sediment, but later on in 1851, the cradle was introduced to speed up the gold mining process by hol ...

(3 pages) 60 0 4.5 Jun/1996

Subjects: Science Essays > Earth Sciences > Geology & Geosciences

Dredging the Hudson River

surrounding areas and those who live down river. These include stirring up the PCBs embedded in the sediment at the bottom of the river and the problem of removing this dug up material to another site ... New York City that is contaminated. Since 1977 these PCBs have been accumulating in fish and in the sediment at the bottom of the Hudson. This seems to be a serious environmental issue in the states o ...

(5 pages) 40 0 4.5 Dec/2002

Subjects: Science Essays > Environmental Science

Costs Versus Benefits Of River Regulation.

imal habitats are lost, land that may already be in use for agriculture is lost, important sand and sediment, that should nourish the downstream reaches is caught at the dam wall, water temperature is ...

(3 pages) 32 0 3.0 May/2003

Subjects: Science Essays > Earth Sciences > Geography

Are u really allowed just to copy copyrighted text straight of another site?

Tyne ; Health effects of sea bathing ;Analysis of technazene and its breakdown products ;Effect of sediment metals on estuarine benthic organisms ; Biological effects of contaminants workshop ;Fish f ... minants workshop ;Fish farm chemicals in sea locks ;Diffuse pollution from land-use practices ; and Sediment water contaminant exchange.Three Graces (Statue)Mr. Neil Hamilton : To ask the Secretary of ...

(14 pages) 66 0 3.0 Mar/2004

Subjects: Science Essays > Earth Sciences > Geography

Diverse Stromatolites in Washington State (Assigned out of "On Methuselah's Trail")

Washington is a very diverse place for fossils and sedimentary rock, with relatively young deposits of rock found on the Western and Eastern parts. A c ... alled Addy is a place where one can walk up a hill and go through thousands of years of time in the sediment and sandstones with every step. The Quartzite in the Addy has the first record of fossils o ... ipalian.Stromatolites are large globular bodies that are formed when algae is covered by a layer of sediment, and sends filaments upward. They flourished in the Precambrian era, but about 800 years ag ...

(3 pages) 30 1 3.0 Mar/2004

Subjects: Science Essays > Biology

Litterature review: Biotic and abiotic factors affecting the distribution of freshwater macroinvertebrates

.Unlike fish, benthos cannot move around as much, so they are less able to escape the effects of sediment and other pollutants that diminish water quality. Therefore, benthos can give reliable info ... stated that the two most important factors affecting macroinvertebrates are substrate and suspended sediment. They found that there are four to five physical and chemical factors that have significant ...

(7 pages) 78 0 4.8 May/2004

Subjects: Science Essays > Biology

Industrialization is responsible for the world's environmental problems

resource studies, the environmental problems such as the accumulation of heavy metals in water and sediment in the canal and river have been the major focus in the study area. The study shows that th ... the study area. The study shows that the major source of heavy metals that accumulate in water and sediment is industries. As a result, it motivates the researcher to choose the research topic about ...

(18 pages) 231 0 3.5 May/2004

Subjects: Science Essays > Environmental Science

Determining the Age of a Fossil

plant or animal died. Others are tracks or trails left by moving animals. Most fossils are found in sedimentary rocks. These fossils formed from plant or animal remains that were quickly buried in sed ... ottom of rivers, lakes, swamps, and oceans. After thousands of years, the weight of upper layers of sediment pressing down on the lower layers turned them into rock internet article). A few fossils ar ...

(11 pages) 101 1 4.5 Jun/2004

Subjects: Science Essays > Earth Sciences > Geology & Geosciences

Fresh water Ecology Josh de Salles

oes not become a limiting factor in their growth.iii) SubstrateStreams that carry a large amount of sediment in suspension (e.g. due to a muddy stream bed) may have a decreased amount of light availab ...

(5 pages) 27 0 3.0 Jul/2004

Subjects: Science Essays > Biology

Determine which of the areas along Toronto's shoreline is at the greatest risk for coastal erosion.

s are at risk from coastal erosion (Pilkey). Also, there are geographic consequences as eroded land sediment is carried back into the water by destructive waves that gradually decompose the coastline, ... eat steepness of the slopes, results in a double jeopardy of sorts: steep slopes make it easier for sediment to travel down to the water, while large heights mean that erosion of the base can lead to ...

(11 pages) 31 0 4.3 Feb/2005

Subjects: Area & Country Studies Essays

Floods: Causes and Consequences

s central to any discussion of floods. A broad, nearly flat landform consisting of stream-deposited sediment, the flood plain is inundated by flows in excess of channel capacity (that is, a flood). Th ... that is, a flood). The flood plain is higher along the edge of the river, built up by deposition of sediment from water overflowing stream banks. As the water leaves the channel, it is abruptly slowed ...

(12 pages) 68 0 5.0 Mar/2006

Subjects: Science Essays > Earth Sciences > Oceanography

Sand Dunes

is blowing.As claimed by McHenry [2] (1993, p. 754) "Sand dunes are also formed as the wind carries sediment from the beach in a landward direction, depositing it wherever an obstacle obstructs airflo ... actors that influence the development of sand dunes. The main factors include wave action, wind and sediment supply. Initially, wave action is a major influence. Strong ocean currents hold sediment fr ...

(10 pages) 31 0 3.3 Jul/2006

Subjects: Science Essays > Biology

Hudson River

ommunities that dredging is not the answer. GE believes that the PCBs in the river are buried under sediment and that dredging will only resuspend them. This is a rational thought by GE, according to ... Bs are resuspending everyday and washing down river. According to GE they are safely buried beneath sediment and will not rise into the water column unless disturbed by dredging. GE also believe that ...

(4 pages) 946 0 0.0 Oct/2001

Subjects: Literature Research Papers

Discovery Park

The field trip to Discovery Park was useful in conducting a geological study on the four layers of sediment that describe the physical history of the Puget Sound. Just by looking at the sediment the ... ound into a large lake. The Olympia Formation is know to contain ripples and has iron oxides in the sediment which explains why it is a reddish brown color. The second oldest layer is called the Lawto ...

(1 pages) 1135 0 0.0 Nov/2001

Subjects: Science Essays > Environmental Science


DIATOMITE Diatomite is a sedimentary rock, that is white and yellowish in color. It is composed of fossilized skeletons of on ... ts of compounds such as aluminum and iron oxides.The material is extracted by a dredging barge cuts sediment with rotating knives, mixes it with water and pumps it along a suspended pipeline to the sh ... many mining machines, the waters can be easily polluted. The method of dredging to cut away at the sediment does not seem like it would be as environmentally friendly as well. Aside from the mining h ...

(5 pages) 760 0 0.0 Feb/2008

Subjects: Science Essays > Environmental Science

Agriculteral Pollution

he water. It can cost anywhere between $2 and $8 billion dollars a year just to fix the damage from sediment runoff. Groundwater damage is also caused my farmicides. Half of the nation's drinki ...

(1 pages) 10 0 0.0 Feb/2008

Subjects: Science Essays > Environmental Science

Alfred Wegener and the Continental Drift

t slide right into place with Africa. Some overlap is present but that is due to streams depositing sediment along the coasts.Wegener also found that fossils match across seas. He found that the same ...

(2 pages) 16 0 3.0 Feb/2008

Subjects: Science Essays > Environmental Science

Field study of biotic and abiotic factors affecting abundance and distribution of mangroves in Sydney Olympic park mangrove reserve.

r. (do not submerge the black portion of the probe)3.Record your reading in ppk.(parts per thousand)Sediment temperature1.Carefully push probe 5cm into sediment and leave for 2 minutes.2.Record the te ... 5cm into sediment and leave for 2 minutes.2.Record the temperature whilst the probe remains in the sediment.3.Clean the probe and return to the container.Air temperature1.Hold the thermometer away fr ...

(7 pages) 32 0 5.0 Mar/2009

Subjects: Science Essays > Biology > Plant Biology

lucy a start

a dry and desolate desert. After Lucy died, it was difficult to find her remains due to erosion and sediment in the body of water in which she died. Johanson and his team worked were able to use the a ...

(2 pages) 0 0 0.0 Apr/2013

Subjects: Art Essays