Why Should We Protect the Water?
What are the sources of ocean pollution? Pollution- The introduction of harmful waste products, chemicals, and other substances not native to an environment. Sewage Chemical Pollution Oil Pollution Solid-waste Pollution Sediment
Sewage Source: Leaks from septic tanks. Pumped directly by factories. Result: Sewage acts like a fertilizer creating algae blooms. Algae uses up the oxygen meant for other marine life. Ecosystem and food chains change.
Chemical Pollution Sources: Herbicides(weed killer) and pesticides (insect killer) get to the ocean through runoff. Factory smoke. Industrial waste (metals and mercury) Results: Sea organisms ingest harmful chemicals. Ecosystems and food chains change.
Oil Pollution Sources: 44 % of oil in the ocean comes from land runoff. Oil tanker collisions. Leaks on offshore oil wells. Results: Ocean animals are harmed. Ecosystems and food chains are changed.
Solid Waste Pollution Sources: What are some sources littering you see on a daily basis? Results: Dirty beaches. Ocean animals eating plastics. Ecosystems and food chains are changed.
What is the Great Pacific Garbage Patch? 194/The-Great-Pacific-Garbage-Patch-Good-Morning- America 194/The-Great-Pacific-Garbage-Patch-Good-Morning- America
Sediment Source: Increase runoff of silt due to construction and deforestation. Result: The silt covers coral reefs and fills marshes. Safe places for ocean organisms to grow are changed.
Point or Nonpoint Pollution Point source pollution – occurs when the contaminate comes from an obvious source. (you can track the spot where the pollutants enter waterways) Easy to identify, monitor, and regulate Nonpoint source pollution - are difficult to identify and control, and hard to clean up
What was done about this Starting in 1914 the USA implemented drinking water standards for wells concerning coliform growth and by 1940 the standards began to apply to municipal (city) drinking water. In 1974 the Safe Drinking Act was formed. It’s main goal was to provide every person in the developed world the right to safe drinking water.
What was done about this Starting in 1970, public health concerns shifted from waterborne illnesses caused by disease-causing micro- organisms, to health concerns caused by water pollution such as pesticide residues and industrial sludge and organic chemicals. Regulation now focused on industrial waste and industrial water contamination, and water treatment plants were adapted.
How do we keep our <1% good drinking water safe and clean? There are many ways we can purify water on earth. For example, you can boil water to help kill harmful bacteria in our drinking water if the sewers overflow into our fresh drinking water supply. Hydrologists typically use 5 methods for cleaning our water so we can reuse it over and over again. Carefully remove the five objects in the bag. Each represents a different method of water purification.
SAND FILTRATION The JAR OF SAND represents how water can be filtered by sand just like underground. With water’s adhesive abilities helping sand trap impurities while the cleaner water flows through slowly and more cleanly.
DECOMPOSING BACTERIA The empty container of ACTIVIA represents the millions of good bacteria that can be used to gobble up all the dead or deadly microbes in the water. These bacteria are the good guys who are the tiniest soldiers in our water cleaning arsenal.
SETTLING TANKS The GLITTER JAR represents a settling tank, whereby, sediments sink to the bottom of a big tank of water. After awhile, the cleaner water is skimmed from the top.
CHLORINE DISINFECTING The BLEACH CONTAINER represents the small bit of chlorine that is added to get rid of any living microbial life in the water. Just a bit is added so the water doesn’t taste bad like a swimming pool.
SCREENING The PIECE OF SCREEN represents the screening that water goes through to remove leaves and small debris from the fresh, but yet to be drinkable water.
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