After the algae accumulate, it dies, decomposes and depletes the oxygen in the ocean creating a dead zone. Natural elements of climate, weather and change in wind circulation also cause changes in algae growth. In the spring months increased rain, water flow and sunshine increase this algae growth. In the fall tropical storms and hurricanes break up the algae and the cycle repeats again. The largest human cause of dead zones is nutrient run off from abundant use of fertilizers, animal waste and sewage.
To purify polluted water we may use different type of methods according to the pollutants entered in the water. Chemical disinfection of water is one of the most important methods in the process of purifying water; this method can kill lots of pathogens that exist in the polluted water by killing them. http://www.informaction.org/images/graph_ocean-pollutants.jpg Fig 1 Water is made up of two hydrogen’s and one oxygen. Most part of the earth is water that means three fourth of the earth is made up of water but the problem is most of it is not suitable for drinking. https://qed.princeton.edu/getfile.php?f=Water_Pollution_since_the_1960s.jpg Fig 2 water pollution world wide In 1854 the British scientist John Snow discovered that cholera disease was caused by the contamination of water, he also showed that chlorine can be used to disinfect contaminated water to prevent such kind of diseases.
Water quality and contamination SCI 207: Dependence of man on the environment 7 April 2014 Water Quality and Contamination Introduction Body Paragraph #1 - Background: All of mankind relies on potable public or private drinking water supply to survive. “Testing of water quality on a regular basis is, therefore, an important part of maintaining a safe and reliable source” (Borah, Bhuyan, & Sarma, 2010). As stated by the World Health Organization (WHO), “Catastrophic events can result in periods of very degraded source water quality and greatly decreased efficiency in many processes, or even system failure, greatly increasing the likelihood of a disease outbreak (2011). Body Paragraph # 2 - Objective: The purpose of this study is to show the importance of having a uncontaminated water supply. People may contract serious illnesses or even worse, die from drinking contaminated water.
In 1982, special tap water testing identified trichloroethylene (TCE) and tetrachloroethylene (PCE). The test results varied between drinking water samples collected at different times. In 1984-1985, when base officials discovered that these chemicals were in specific drinking water supply wells, these affected wells were taken out of service. The chemicals detected in the drinking water were a class of chemicals known
I am having some difficulties as my plant does not look health but rosemary does regenerate. I began my experiment with the tools such as, snipers, bottled and tap water, and vinegar. Then I would need and began to detach my rosemary stems. Thirdly, I recorded my observations in the chart below and place the near my sliding glass door. [pic] Crucial instruments needed for experiment References What is Acid Rain?
By User:Vmenkov (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0-2.5-2.0-1.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons All artificial desalination processes are based on the natural hydrologic cycle. For the most part, the energy requirements to desalinate seawater are heavy, making the process expensive. Still, it is estimated that 30 percent of the world’s irrigated areas suffer from salinity problems that prevent crops from flourishing as they would if freshwater were available. The need for desalinated water for human and crop consumption is critical in the Middle East and other regions where freshwater is not abundant. Distillation The most fundamental form of desalination is distillation, one of the earliest forms of water treatment.
Pollution in seasonal wetlands Wetlands are considered habitats that help trap and reduce pollutants that come from all types of sources, such as oils from cars, chemicals from drainage runoff, sprinklers that have fertilizer runoff from nearby grass located around buildings, agriculture runoff, untreated sewage from pets and human waste, and in flow of domestic and industrial wastes. Other harmful chemicals that are human related are antibiotics from animal husbandry, pesticides that act as endocrine disrupters. (Ramsar 2008) These pollution sources all contribute to the negative health of wetlands all over California. Roseville wetlands are being inundated with water pollution from many of these human related sources around them. Wetlands can only handle so much of these pollutants, and with the major habitat loss that has completely changed the dynamics of these once seasonal wetlands, can only limit the ability for these wetlands to filter as much of the pollution as possible.
The release of a liquid petroleum hydrocarbon also known as an oil spill has a large negative effect on the ocean. Oil is commonly used by individuals however often oil can be a problem to organisms and their inhabitants. Oils spills are a form of pollution and there are various sources of oil in bodies of water. There are several scientific solutions for oil spills, as well as possible ways to prevent this harmful pollution. In 2010 ,172 million gallons of oil spilled from a whole on the ocean bed in the Gulf of Mexico.
In addition, if the soil is already saturated with water, it cannot absorb much more, which leads to an increase in runoff. Land cover, such as vegetation or man-made surfaces, also affects the movement and infiltration of water. Water that doesn't infiltrate the ground is called surface runoff. When water flows over land, it follows a path to the lowest point, running down hills to creeks, streams, and rivers until it eventually reaches a sea or ocean. Rainwater and melted snow and ice that move too quickly to infiltrate the ground become runoff.
It turns into a river because of all the water the mountains have and then creates a path. Rivers cause erosion. Runoff from rivers cause rocks to erode. Because of gravity, runoff, and the sediment it has, to move downhill. An example of this sheet erosion.