Global risks: Pool knowledge to stem losses from disasters Turjoy Chowdhury/Nurphoto/Corbis This year's deadly earthquakes in Nepal killed more than 8,000 people and reduced thousands of buildings to rubble. In April and May, two massive earthquakes in Nepal killed more than 8,400 people, injured 20,000 and reduced 300,000 houses to rubble. The Water Cycle for Kids and Students The water cycle describes how Earth's water is not only always changing forms, between liquid (rain), solid (ice), and gas (vapor), but also moving on, above, and in the Earth. This process is always happening everywhere. Back to the water cycle diagram for students.
Polluted Water Challenges China’s Engineering Efforts Memo #114 (The third Memo from the Theme, Water, Scarcity, and Tibetan Plateau Frontiers) By Darrin Magee – magee [at] hws.edu Water is central to China’s environmental challenges. While not water-short overall, the geographic and temporal variations in China’s precipitation are extreme. Water and Conflict in Asia? Water security is emerging as an increasingly important and vital issue for the Asia-Pacific region. Perhaps no other resource—other than oxygen—is so intricately linked to human health and survival. However, as the region’s population growth continues to surge, the demand for water is increasing substantially, without a concomitant increase in water resources. Many Asian countries are beginning to experience moderate to severe water shortages, brought on by the simultaneous effects of agricultural growth, industrialization, and urbanization. In recent years, moreover, evidence indicates that water security is becoming increasingly affected by erratic weather patterns, most notably the El Nino and La Nina weather phenomena. Several countries in the region, including Indonesia and Papua New Guinea, have experienced droughts of such severity that they have caused food shortages and have threatened the long-term food supply.
Engineers develop revolutionary nanotech water desalination membrane Researchers at the UCLA Henry Samueli School of Engineering and Applied Science today announced they have developed a new reverse osmosis (RO) membrane that promises to reduce the cost of seawater desalination and wastewater reclamation. Reverse osmosis desalination uses extremely high pressure to force saline or polluted waters through the pores of a semi-permeable membrane. Water molecules under pressure pass through these pores, but salt ions and other impurities cannot, resulting in highly purified water.
J. Rainforest role in the water cycle « Rainforest Conservation Fund Freshwater is an essential resource which is under increasing pressure. Dams and other diversionary activities, particularly agriculture, have diverted a huge amount of the world’s fresh water for human use. Humans now use more than 50% of the available fresh water of the earth, and this proportion is en route to increase to 70% in the next half-century. Therefore it behooves us to attend to all factors which affect the water cycle. Although the role of rainforests in the global water cycle is relatively small compared to that of the oceans, it is nevertheless extremely important. Rainforests influence the hydrologic cycle in the following ways: Human Appropriation of the World's Fresh Water Supply "Water, water, everywhere, nor any drop to drink"- Rhyme of the Ancient Mariner, by Coleridge. Jump to: [The Water Resources of Earth] [Consumptive and Non-Consumptive Water Use] [Human Appropriation of Renewable Fresh Water ] [What are the Solutions?] [Water Sustainability, Water Security][References] The Water Resources of Earth
Water Pollution and It’s Consequences - GlobalH2o – a clean water initiative by Anonymous • on News • April 12th• Different reports of some UN agencies warn on increasing scarcity of water per capita in many parts of the developing countries. This crises is happening due to population growth which has the highest rate in those countries, as well as the absence of proper sanitation systems and infrastructures. Than, there are also changes in climate, and the pollution factor that brought us were we are now. As far as water quality, the poor are still under the strongest attack: 50% of the population in developing countries are exposed to polluted water sources.
Warmer is not always wetter Not all warming is the same. For the same increase in temperature, global warming caused by greenhouse gases results in less rainfall than does warming caused by the sun’s radiation, climate simulations suggest. Because wet places should get more rain as the climate heats up, the new results may explain the mystery of why a warm period 1,000 years ago was wetter than the warm late 20th century.
Learning package on Hydrology by the National Institute of Hydrology A "Learning Package on Hydrology" by the National Institute of Hydrology deals with elements of the hydrologic cycle and explains the processes of rainfall, runoff and evapotranspiration and their interaction. This “Learning Package on Hydrology” by the National Institute of Hydrology deals with the basic scientific concepts underlying hydrology. In a general sense the package deals with elements of the hydrologic cycle and explains the processes of rainfall, runoff and evapotranspiration and their interaction. All the World's Volcano Webcams Never in the history of volcanology have so many volcanoes been monitored. We have the ability to sit and watch hundreds of volcanoes as they sleep, rumble or erupt — all from the comfort of our homes or offices. This instant connectivity to volcanoes in some of the most remote parts of the world is what gives us the impression that there are more volcanic eruptions today than in the past. There really aren’t more, but rather we hear about or see the eruptions much faster.
The Urgency of Water Security - THE CHALLENGE Feeding the world Feeding the world has been a top priority for decades. The task is not getting easier. Dirtiest River on Earth The Citarum River Once upon a time, the Citarum River was rich in fish and wildlife. Local villagers caught fish and used river water to irrigate rice paddies and vegetable plots. They bathed, cooked and drank the river water.
Discovery Of Massive Aquifers Could Be Game Changer For Kenya : The Two-Way hide captionMembers of the El Molo tribe are pictured in the village of Komote, on the shores of Lake Turkana, northern Kenya, last year. Carl De Souza/AFP/Getty Images Members of the El Molo tribe are pictured in the village of Komote, on the shores of Lake Turkana, northern Kenya, last year. Satellite imagery and seismic data have identified two huge underground aquifers in Kenya's drought-prone north, a discovery that could be "a game changer" for the country, NPR's Gregory Warner reports. The aquifers, located hundreds of feet underground in the Turkana region that borders Ethiopia and South Sudan, contain billions of gallons of water, according to UNESCO, which confirmed the existence of the subterranean lakes discovered with the help of a French company using technology originally designed to reveal oil deposits.