Grade 7 www pollution overview
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The document discusses indicators used to measure water pollution in the Mekong Delta and Ho Chi Minh City areas. It outlines two types of indicators: biological indicators like benthic macroinvertebrates, and chemical indicators such as dissolved oxygen, nitrates, hardness, phosphates, carbon dioxide, and acidity. The presence of different classes of macroinvertebrates and levels of chemicals can provide information about the health of water bodies and potential effects on local ecosystems and human health. The document also examines common causes of water pollution like agricultural and industrial runoff and their environmental impacts.
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This document discusses various types of water pollutants including pathogens from sewage, organic waste from industrial and agricultural activities, chemical pollutants from industry and mining, excess sediments, and excess nutrients that can cause eutrophication. It provides examples of point source pollutants from factories and non-point source pollutants from agricultural runoff and urban areas. Prevention methods include reducing water usage, properly disposing of household waste, and minimizing the use of fertilizers and pesticides.
Ecological Study
Urbanization has negatively impacted the diversity and health of organisms in Reservoir Creek. Upstream areas near residential development had higher temperatures, turbidity, and pollution compared to downstream areas with less development. Upstream sites contained only pollution-tolerant species like worms and midges, while downstream sites contained more sensitive species like mayflies and dragonflies. The changes in abiotic factors from urbanization, such as increased runoff, have disrupted the ecosystem by reducing suitable habitat and food sources for sensitive species. This loss of diversity upstream could impact the whole ecosystem if not addressed.
Water pollution
Water pollution occurs when harmful substances alter the physical, chemical, or biological nature of water negatively impacting organisms. It is a major global issue, with India and China having high levels. The two main sources are point sources like factory emissions and non-point sources like contaminated runoff. To effectively address water pollution, a number of measures must be taken in the next 10 years according to experts, but pollution still occurs from sources like agriculture, industry, sewage, and religious activities. Prevention methods include ecosystem protection, water recycling, and wastewater reuse.
Gem ppt-27-stop water pollution
This document discusses water pollution and its causes. It explains that water pollution occurs when large amounts of pollutants are added to water bodies, harming water quality and aquatic life. Pollutants can come from point sources like pipes directly releasing waste, or non-point sources like farm runoff carrying fertilizers and pesticides. Various types of pollution are described like toxic, organic, and thermal pollution. Specific sources of pollution are also outlined, such as runoff from agricultural lands, industrial waste, and household sewage. The document encourages actions like proper waste disposal and use of environmentally-safe chemicals to help reduce water pollution.
Water monitoring presentation
Monitoring natural waters provides important information about environmental health and human impacts. There are four main methods: visual surveys assess appearance and conditions; biological inventories examine macroinvertebrate diversity and pollution tolerance; water quality tests measure factors like pH, temperature, dissolved oxygen, and contaminants; and flow rate can be monitored. Together these methods generate data for understanding watersheds and informing management decisions.
Environmental pollution.pptx
Definition Cause, effects and control measures of :- a. Air pollution b. Water pollution c. Soil pollution d. Marine pollution e. Noise
pollution f. Thermal pollution g. Nuclear hazards Solid waste Management : Causes, effects and control measures of urban and industrial
wastes. Role of an individual in prevention of pollution. Pollution case studies.
Water Pollution
The document discusses various topics related to water pollution including:
1. It describes different types of water pollutants like industrial effluents, sewage, agricultural runoff, and their sources.
2. It discusses the effects of pollution including eutrophication, lack of access to clean water leading to diseases, and plastic waste killing marine life.
3. Solutions to water pollution problems require treating industrial and domestic waste before discharge into water bodies.
Water pollution
Water pollution is a major global crisis as clean water is essential for human survival and health. Many sources pollute water, including sewage, fertilizers, oil spills, chemical dumping, and untreated industrial waste. This pollution contaminates both surface water and groundwater sources. Water pollution has serious negative effects like increased waterborne diseases and harm to aquatic plants and animals due to toxic chemicals and lack of oxygen. Immediate action is needed to reduce pollution and protect this vital resource.
Ingles
Water pollution is the contamination of water bodies by human activities. It covers over 70% of the Earth's surface and is an important resource. The main types of water pollution include nutrients, surface water, oxygen depleting, ground water, chemicals, and oil spills. Industries are a major cause of water pollution through sulfur, asbestos, lead, mercury, nitrates, phosphates and oils. Other causes include sewage, septic tanks, ocean dumping, underground storage leaks, and atmospheric deposition. The effects of water pollution are death of aquatic animals, disruption of food chains, diseases, and destruction of ecosystems. Prevention efforts include proper waste disposal, wise water usage, and mindful use of chemicals and fertilizers.
Water pollution and toxicology
This document discusses water pollution, including its definition, types, causes, effects, and control measures. It defines water pollution as the presence of contaminants that can alter water quality and impair its uses. The main types of water pollution are surface, ground, and nonpoint source pollution. Causes include sewage, industrial and agricultural waste, while effects comprise increased diseases, disrupted ecosystems, and toxic impacts on organisms. Control measures center on wastewater treatment, sustainable agriculture and water management, pollution prevention, and conservation.
Ssc ppt water pollution
Water pollution is a major global problem that threatens human, animal and environmental health. It is caused by various factors like increasing population, industrial waste, agricultural runoff, and untreated sewage. This leads to contaminated surface and groundwater with harmful chemicals, pathogens, and debris. To address this issue, standards have been established for water quality and effluent discharge. However, pollution continues as many industrial and municipal wastewaters remain improperly treated before being dumped in water bodies. Preventing further water pollution through conservation efforts, proper disposal of toxins, and reducing plastic use can help address this growing crisis.
Group1 - water pollution
Water pollution occurs when harmful substances are directly or indirectly discharged into water bodies without treatment. This contamination affects plants and organisms living in these bodies of water, damaging both individual species and entire biological communities. The specific contaminants causing pollution include a wide variety of chemicals, pathogens, and changes in physical properties of water like temperature and clarity. Many of these contaminants are toxic or can cause disease in humans and animals.
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Grade 7 www pollution overview
- 1. Water Pollution Indicators of the Mekong Delta Grade 7 Science Saigon South International School Week Without Walls 2010
- 8. Class 1 Organisms are pollution sensitive. They are associated with good water quality. They do not tolerate pollution well, and large numbers are observed only when good water quality is present.
- 9. Class 2 Organisms somewhat pollution tolerant. They tolerate water pollution better than Class 1 organisms. We can expect to see significant numbers of these animals when the water quality ranges from good to moderate.
- 10. Class 3 Organisms are pollution tolerant. They are tolerant to even higher levels of pollution than are Class 2. When these animals dominate, poor water quality is generally the reason.
- 16. U.S. Fertilizer Loss Nitrogen runoff