Reference Article

from Wikipedia, the free encyclopedia

Water pollution

Water pollution is a large set of adverse effects upon water bodies (lakes, rivers, oceans, groundwater) caused by human activities.

Although natural phenomena such as volcanoes, storms, earthquakes etc. also cause major changes in water quality and the ecological status of water, these are not deemed to be pollution.

Water pollution has many causes and characteristics.

Increases in nutrient loading may lead to eutrophication.

Organic wastes such as sewage and farm waste impose high oxygen demands on the receiving water leading to oxygen depletion with potentially severe impacts on the whole eco-system.

Industries discharge a variety of pollutants in their wastewater including heavy metals, organic toxins, oils, nutrients, and solids.

Discharges can also have thermal effects, especially those from power stations, and these too reduce the available oxygen.

Silt-bearing runoff from many activities including construction sites, forestry and farms can inhibit the penetration of sunlight through the water column restricting photosynthesis and causing blanketing of the lake or river bed which in turns damages the ecology.

Note: This article excerpts material from the Wikipedia article "Water pollution", which is released under the GNU Free Documentation License.

See the following related content on ScienceDaily:


Related Videos

last updated on 2014-07-28 at 7:05 am EDT

Spain: The Battle Over Water

Spain: The Battle Over Water

Deutsche Welle (Aug. 21, 2013) As a result of the economic crisis, many municipalities in Spain have sold their public water utilities to private companies. Now some local communities are finding out that the water supply networks are no longer being maintained properly and that water quality is on the decline. By the end of the year, about 60 percent of water utility management will be partly or entirely in private hands, making Spain the frontrunner in water privatization within Europe. Some experts are already calling it a "water bubble, and communities that are still trying to sell their water utilities are no longer able to obtain top prices. Now some communities are trying to regain public control over their water supply.
Powered by NewsLook.com
Sao Paulo Choking on Its Own Smog: Study

Sao Paulo Choking on Its Own Smog: Study

Reuters (Oct. 21, 2013) Sao Paulo, host city of the first World Cup soccer match next year, has a major pollution problem. A recent study says air pollution in the southern Brazilian city causes three times more deaths than breast cancer or traffic accidents and costs the state US$160 million per year. Tara Cleary reports.
Powered by NewsLook.com
Paris Police Take Measures to Help Combat Pollution

Paris Police Take Measures to Help Combat Pollution

AFP (Mar. 13, 2014) Nearly a third of the 22 regions in mainland France are on a maximum pollution alert. Police in Paris have been trying to bring down pollution levels by diverting traffic from the city and enforcing lower speed restrictions. Duration: 00:53 Video provided by AFP
Powered by NewsLook.com
Climate in Bolivia: Water for La Paz

Climate in Bolivia: Water for La Paz

Deutsche Welle (Nov. 11, 2012) The metropolitan area of La Paz is expected to grow to 8 million people in the coming twenty years. Water from the mountains is already barely sufficient to supply the Bolivian capital during dry seasons. Because of climate change, rainy seasons can no longer be reliably calculated. To ensure an adequate long-term supply of clean water for the region, which lies at an altitude of 4000 meters above sea level, water management around the six Andean glaciers has to be adjusted to suit the climatic changes.
Powered by NewsLook.com

Related Stories


Share This



Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins