Water Pollution Module
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1 Water Pollution Module Learning objectives: Understand different types and consequences of water pollution. Understand that some kinds of pollution are regulated, and others are not. Appreciate the range of pollutants affecting waters on campus. Learn the different ways that students, organizations, and UGA can help. Mode of delivery: Powerpoint Activities:??? Assessment: Quiz and feedback assignment
2 know about Water Pollution
3 WHAT IS WATER POLLUTION?
4 Water pollution - defined Any addition of a foreign substance to a water body that lessens its value to humans and other species
5 Overview A. Types of pollution C. Pollution at UGA 1. Biological 2. Chemical 3. Physical B. Pollution sources.point.non-point D. What can you do?
6 Water pollution categories Defined by WHAT is in the water: 1. Biological pollution 2. Chemical pollution 3. Physical pollution
7 1. Biological pollution When organisms like plants & animals, or their waste, are introduced into water bodies. A. Intentional introductions Recreational (e.g., for fishing) Food Flathead Catfish in GA are reducing the native sunfish populations in Satilla River
8 1. Biological pollution B. Unintentional introductions Ship ballast water hitch-hiker plants on outboard motors & fishing gear Sicencebuzz.org Great economic impacts Zebra mussels $3.1 bil. per year
9 1. Biological pollution C. Sewage Athens first sewage 1960 in? treatment Accidental: Broken pipes Floods Intentional?? Combined sewer/ stormwater systems 860 BILLION gallons raw sewage/yr discharged in U.S. UGA: major pipe break
10 2. Chemical pollution Metals Radioactive material Inorganic chemicals: Organic chemicals: Pesticides Industrial products, cleaners, byproducts Nutrients: Fertilizers, phosphates Pharmaceuticals
11 2. Chemical Heavy metals E.g. Iron ore mining in Canada Cd cadmium Pb - lead Fe - iron Water Acidification Increased Salinity Interfere with enzymes
12 2. Chemical Persistent organic pollutants They have their uses. Pesticides Flame retardants Skin Stain resistance rashes Non-stick cooking surfaces Cancer Plastics Birth Electrical insulators defects But also have their costs Poisoning
13 2. Chemical Biomagnification Example: PCBs in Lake Michigan (a really nasty toxin) ONE TROUT has more PCBs than LIFETIME
14 2. Chemical Nutrient pollution Essential nutrients (N and P) agricultural fertilizers domestic sewage livestock wastes Eutrophication: Nutrient enrichment of aquatic ecosystems. Eu (=good) Troph (=food)
15 2. Chemical Nutrient pollution Harmful algal blooms (HABs) Blue-green algae Red tide (marine) Can produce TOXINS -- kill fish, cows, people Temporary fisheries & beach closures
16 2. Chemical Gulf of Mexico Dead Zone Hypoxia Without oxygen 1. Algae population grows unchecked Dead Zone as big as New Jersey 2. Depletes resources 3. Then algae dieof Nancy Rabalais
17 2. Chemical Pharmaceutical Endocrine Disruptors Afect hormones & metabolism Poorly understood No EPA regulations yet Not just birth control: Variety of medications Herbicides Pesticides Industrial chemicals Plastics Antibacterial soap Our Food!
18 3. Physical pollution
19 3. Physical Debris Commercial Municipal!!!!!!! PERSONAL!!!!!!! Preventable Leads to accumulation in marine systems
20 North Pacific garbage patch Fish & Wildlife attracted to floating debris Ingest debris Become sick & die Plastic debris 1,000s of years to degrade Most less than 1mm 60:1 plastic : plankton source of persistent
21 Pollution sources Point-source welldefined location. Regulated through permits. Nonpoint source over large areas. Not
22 Fig. 11.3
23 Pollution sources What s regulated? (add text) What s not regulated? (add text)
24 UGA s Water Bodies (map) Creeks: Biological: sewage, dog poo Physical: trash, sediment Chemical: (add)
25 What can YOU do? [ALL litter can cause water pollution. Keep your eyes open & get the app! Scoop that poop! Volunteer ]
26 Activities
27 Assessment [Few basic questions] What pollution example did you find the most surprising to learn about? What kind of pollution are you most worried about? Name something you can do diferently to reduce pollution
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