Wait a second!
More handpicked essays just for you.
More handpicked essays just for you.
Essay of wetlands 108 to 1996
Essay of wetlands 108 to 1996
Global warming wetland
Don’t take our word for it - see why 10 million students trust us with their essay needs.
Recommended: Essay of wetlands 108 to 1996
REMEDIATION OF CONTAMINATED MARSH LAND:
Introduction:
Coastal wetlands are commonly known as marshes or marsh land. There are various kinds of marsh land from coastal to inland and saltwater to fresh water etc but mainly distinguished as Tidal marsh lands, Freshwater marsh lands, Mangrove swamps or brackish wetland (Mitsch and Gosselink, 2000). Wetland ecosystems are herbaceous vegetations that not only protect wide variety of wildlife but also protect the shores support coastal fisheries also (US EPA, 2004).
Due to the increase in pollution contamination of marshes are increasing rapidly. Case studies suggest, the principal cause of pollution is anthropogenic activities rather than the accidental oil spills in the marine ecosystem contrary to belief of the people. Cooney (1984) studied that fresh water marshes are deliberately polluted by human activities.
Another major cause of pollution is deposition of heavy metals, trace metals which is very harmful due to its high toxicity, persistence and bioaccumulation in nature (Tam and Wong, 2000). These pollutions are mainly caused by mining and processing of ores and metals from the industries.
There are many methods to treat a remediation site: 1) Physical 2) Chemical 3) Biological. Studies suggest that majority of contaminants are removed by Physical and Chemical Methods then biological Method is employed. Complete biological approach is yet to be used for maximum removal of the contaminants.
Aim and Objective Of the study:
To study the different contaminants present in the marsh lands and studying what are the major pollutants present in the sites.
To study the pre assessment test that is the conditions and factors that affect the bioremediation e.g. pH , temperature, extent of ...
... middle of paper ...
...osporium, Penicillium Rhodotorula, Sporobolomyces, Trichoderma.
Plants that help in bioremediation are rhizophores, mangroves, lemnia, Spartina etc.
METHODOLOGY:
1) Sampling of the soil and Field study – Type of area to be treated and bio monitoring of the field to decide whether bioremediation is possible mainly by pre-treatment assessment.
2) Pre treatment assessment - factors that affect the bioremediation e.g. pH , temperature, extent of damage done to the marsh land, type of soil and what kind of microorganisms present and type of vegetation present
3) Design of the best approachable bioremediation method
4) Finding out the microorganism or plants that degrade the maximum percentage of contaminant.
5) Applying it in the field conditions and studying its effect in the change in soil or whether it is changing the soil conditions or ecological environment.
Historically, Westfields was part of an interconnected wetland complex which surrounded the Shannon estuary. However typical of many other Western societies, with the Netherlands perhaps being the prime example, anthropogenic activities, in particular land reclamation severely altered portions of the wetland environment. Historical evidence reveals reclamation in certain areas of the Shannon estuary as early as the 10th century, however, such attempts were not made at Westfields until the 1830s (Healy and Hickey, 2002). In the early years of this decade, an...
The tidal salt marshes make vital contributions to the ecosystem in Jamaica Bay. The marshes help spawning processes and are primary nursery for species important to both recreational and commercial uses, providing protection from storm surges, and also removing pollutants and other toxic substances, which as a result, acts as a natural filter, improving the water quality in the bay. Salt marshes are low lying, grasslands that periodically become overwhelmed and drained by high tides. The fish and shellfish nurseries and are also a feeding ground for various species of wildlife in the ecosystem. They support a variety of invertebrates such as mussels, shrimp, oysters and horseshoe crabs that are key elements of the estuarine ecosystem. However, throughout the past few decades, the salt marshes at Jamaica Bay has significantly declined which created a tremendous negative impact on the general public in addition to the deterioration on the living habitats in the area. Many factors contribute to the decline such as sediment depletion, neighboring developments, increased tidal ranges, and especially nitrogen loading from untreated sewage. Although the damages done were unintentional, much of it was occurred due to negligence. As awareness has increased, restoration efforts have escalated as well as various groups respond well to mitigate the losses.
For this whole project on the Conodoguinet creek we are trying to figure out whether or not the creek is polluted. Therefore in this project we had to form a hypothesis. My hypothesis was,If we test the Conodoguinet Creek for signs of acid rain, eutrophication or other types of pollution, at the instant when we perform the experiments we'll know whether or not the creek is polluted. Eutrophication, which is excessive richness in nutrients in a body of water due to runoff, causes a dense growth of plant life and death of macroinvertebrates due to lack of oxygen, has been a problem in the Conodoguinet Creek. In conjunction with Eutrophication, Acid rain which is, a rainfall that damages or harms the water environment has also been a key factor
Dickson wetlands contain a rich variety of nature. This ranges from flowers, grass, shrubbery to trees. Most of the flora found around the Dickson wetland is native to Australia and has a very low environmental impact. Some of the dominant flora that was identified is a type of long grass and gumtree’s. These plants help create a beautiful atmosphere and also filter the water. The effects of these natural filtration systems can be seen in the water statistics taken at the wetlands. With a dissolved oxygen level of 100% and 20.0mg/l and a Ph of 7.70, the water levels are within a healthy range.
Over the past 100 years the Louisiana coastline has suffered greatly from biotic, abiotic, and anthropogenic factors. The abiotic factors include things such as hurricanes or overnutrition that influence the surrounding biota. The biotic factors that contribute to coastal erosion are things like the immigration invasive species and the emigration or extinction of local flora and fauna that help preserve the wetlands. Additionally, there are anthropogenic factors such as pollution that can have strong negative influences on the abiotic and biotic factors of the wetlands. Each one of these factors cause ecological disturbances to the wetlands at a frequency and intensity that is unmanageable for the local flora and fauna. There are currently certain measures that are being taken into consideration to slow or stop the erosion of the Louisiana coastline.
Between 300 and 400 million people worldwide live in areas near wetlands and depend on them. Wetlands are mechanisms for treatment of wastewater are extremely efficient because they absorb chemicals and filter pollutants and sediments. Half the world's wetlands have disappeared due to urbanization and industrial development. The only way to achieve sustainable development and poverty reduction will be through better management of rivers and wetlands, and the land they drain and drain as well as through increased investment in them.
Constructed marshlands can, if improperly designed and implemented, expose the odor of the waste stream (too thin a soil layer over the canals, running the canals down too steep a slope, etc.). Properly designed and built, however, constructed marshlands are odor-free (Environmental literacy Council). • Beach Stabilisation Pros-very expensive Cons- lower the profile of the beach while broadening the beach too and also leaves Hazards on the beach. 13 • Managed retreat • Pros- Managed retreat retains the natural balance of the coastal ecosystem.
A marsh is a type of wetland that is dominated by herbaceous rather than woody plant species Marshes can often be found at the edges of lakes and
Wetlands are also an important type of freshwater ecosystem. They may be soggy and stinky, but they provide critical habitat for tons of plants and animals, help clean our water, control floods, and provide food for
As a volume reduction technique, soil washing is very cost effective when it can reduce the amount of soil that needs further treatment or disposal. Soil washing, when performed under ideal conditions, can lead to a volume reduction of approximately 90% of the originally contaminated soil (Sharma and Reddy 2004). Since soil washing is performed on-site, the large volume of soil that is not contaminated after washing can be reused as backfill at the site. Additionally, soil washing is performed on site in a closed system where the conditions, such as pH level and temperature, of the soil being treated can be controlled and closely monitored (Sharma and Reddy 2004). This on-site system saves money and time and generally the process can be run at a very high rate of around 100 cubic yards per day (US EPA 1996). The process also can remove a range of contaminants, both organic and inorganic, from the soil at the same time. Soil washing also only requires a few permits in order for it to be used, making it a relatively easy method to employ (Sharma and Reddy
- Soils and Soil Fertility, Frederick R. Troeh and Louis M. Thompson (eds.), New York, Oxford University Press, 1993. p. 311, 321 - 322.
Phytoremediation is a novel, efficient, environmentally friendly, low-cost technology, which uses plants and trees to clean up soil and water contaminated with heavy metals and/or organic contaminants such as solvents, crude oil, polyaromatic hydrocarbons and other toxic compounds from contaminated environments. This technology is useful for soil and water remediation.
Therefore, it is crucial to take measures to prevent soil pollution and preserve the natural quality of the soil. soil which makes it unsuitable for cultivation. Due to floodwater, overutilization of chemical fertilizers, pesticides, and bacterial killers, and excessive land use due to the multi-cropping system, many distortions occur in the soil, causing it to lose its essential structure and elements necessary to maintain its fertility. The side effects of soil pollution include severe depletion of certain types of calcium, methane, nitrogen, sulfur, iron, copper, potassium, and phosphorus in the soil, destruction of some useful plants and organisms that provide moisture to the soil, toxic grains, vegetables, and fruits that pose health problems to humans, and alkalinity in the soil, making it unsuitable for cultivation.
Pollutants are the key elements of pollution, which are generally waste materials of dissimilar forms. Pollution disturbs our ecosystem and the balance of the environment. With innovation and development in our lives pollution has reached its peaks giving rise to global warming and human illness. When raw materials, water, energy and other resources are utilized more efficiently, when fewer harmful substances are substituted for hazardous ones, and when lethal substances are eliminated from the production process. Water pollution is also a major problem in the world because almost 60% of it is fish.