Archive for the 'hydrology' Category

Africa: U.S. Response to Future Water Crisis Takes Shape

Published on 05/11/2012 in climate change, hydrology, management, peak water, policy and world water supply. 0 Comments Tags: , .

Photo retrieved from: www.africastories.org

“Secretary of State Hillary Rodham Clinton requested the report and she named Under Secretary of State for Democracy and Global Affairs Maria Otero to lead the U.S. response to the challenges outlined in the study.

Otero told the Washington audience that the first priority she and Clinton have identified is to help other nations develop their capacity in resources and expertise to cope with future water-scarcity problems. “We know that it is countries and communities that have to lead in securing their own water and in securing their own water future,” Otero said.

The United States must also work to increase international awareness of the potential for future water crises by increasing and better coordinating diplomacy. The United States will help developing countries better prepare for the challenges they’ll face, Otero said, and help them “to prioritize so that water and sanitation are part of their national plans, part of their budgets and part of their overall thinking.”

Otero said finding solutions to secure adequate water supplies for growth and development will require enormous levels of funding that the United States must help mobilize. The application of science and technology to the problem is an important part of the strategy.”

Read more: All Africa

 

lily victoria

MENA Changing Drastically & NASA Has The Pictures To Prove It

Published on 05/07/2012 in agriculture, aquatic ecosystems, climate change, contaminated water, dams, drought, groundwater, hydrology, lakes, oil, peak water, policy, rivers, tap water, water diversions, water shortage and water wars. 0 Comments Tags: , .

“Lake shrinkage in Iran

Retrieved from: www.greenprophet.com

Left: August 1985. Right: August 2010.

Iran’s Lake Oroumeih (also spelled Urmia) is the largest lake in the Middle East and the third largest saltwater lake on Earth. But dams on feeder streams, expanded use of ground water, and a decades-long drought have reduced it to 60 percent of the size it was in the 1980s. Light blue tones in the 2010 image represent shallow water and salt deposits. Increased salinity has led to an absence of fish and habitat for migratory waterfowl. At the current rate, the lake will be completely dry by the end of 2013.

Urban Growth in Morocco

Retrieved from: www.greenprophet.com

Left: July 2, 1985. Right: June 24, 2011.

The Moroccan cities of Agadir, Inezgane and Tikiouine are close to the Atlantic coastline (seen in blue in the images), and stretch into the foothills of the Atlas Mountains. Agadir was nearly destroyed by an earthquake in 1960. Reconstruction has focused on tourism, turning this area into a winter destination. The 1985 image shows the area 25 years into the rebuilding. By 2011, the urban areas reach into the Sahara Desert. Growth has been influenced by the expanding fishing industry and modern commercial ports.”

Read more: Green Prophet


lily victoria

Salt Threatens Massive Mangrove Forest

Published on 05/05/2012 in agriculture, aquatic ecosystems, climate change, contaminated water, forests, hydrology, rivers and water shortage. 0 Comments Tags: .

Photo retrieved from: www.nationalgeographic.com

“However, as a recent report by Dr. Md. Mizanur Rahman warns, these mangroves are in trouble. They face rising temperature, rising seas, silt and pollution washing down from deforested areas in the Himalaya, and pressures from aquaculture activities around the Sundarbans.

They are also being assaulted by rising salinity, brought by the formerly fresh rivers and streams that feed them. As agriculture increases in the region, water levels drop, minerals accumulate, and salinity rises. Brackish water is also expanding underground.

“Predictions from Sundarbans territory show that salinity may be double over the next few decades posing risks for survival of flora in Sundarbans,” writes Rahman.

He continued, “Natural vegetations of such areas are being destructed causing major changes in landscapes and biodiversity. Destruction of remaining natural habitats in core areas, buffer zones and corridors are also occurring. Most of the coastal districts already face severe salinity problems, with saline water pushing up to 250 km inward during the dry season.”

According to Rahman, Sundari trees and nypa palms are declining, changing the makeup of the ecosystem.”

Read more: National Geographic

 

lily victoria

Big Changes in Ocean Salinity Intensifying Water Cycle

Published on 05/03/2012 in aquatic ecosystems, climate change, hydrology, oceans and peak water. 0 Comments Tags: , , .

Satellite image shows the distribution of water vapor over Africa and the Atlantic Ocean on 2 Sept 2010. Retrieved from: www.motherjones.com

“A paper in Science today finds rapidly changing ocean salinities as a result of a warming atmosphere have intensified the global water cycle (evaporation and precipitation) by an incredible 4 percent between 1950 and 2000. That’s twice the rate predicted by models.

These same models have long forecast that dry areas of Earth will become drier and wet areas wetter in a warming climate—an intensification of the water cycle driven mostly by the capacity of warmer air to hold and redistribute more moisture in the form of water vapor.

But the rate of intensification of the global water cycle is happening far faster than imagined: at about 8 percent per degree Celsius of ocean warming since 1950.

At this rate, the authors calculate:

  • The global water cycle will intensify by a whopping 16 percent in a 2°C warmer world
  • The global water cycle will intensify by a frightening 24 percent in a 3°C warmer world”

Read more: Mother Jones

lily victoria

INDONESIA: Living with dirty water

Published on 04/30/2012 in contaminated water, hydrology, management, policy, rivers, wastewater and waterborne diseases. 0 Comments Tags: , .

Photo retrieved from: www.irinnews.org

“Heavy pollution of river water by household and industrial waste in the Indonesian province of West Java is threatening the health of at least five million people living on the riverbanks, say government officials and water experts.

Poor sanitation and hygiene cause 50,000 deaths annually in Indonesia, with untreated sewage resulting in over six million tons of human waste being released into inland water bodies, according to an ongoing study by the World Bank.

Ibu Sutria, 53, lives in a wooden shack on the banks of West Java’s Krukut River, which runs approximately 20km south from the capital, Jakarta, to the city of Depok. “Sometimes the river is clean, sometimes it’s dirty,” she said. Sutria suffers from regular bouts of stomach ache and diarrhoea, and says the river is constantly flooded.

“People use the river for a toilet and children play in it because they have nowhere else to swim.” She and others in her community use nearby ground water to wash themselves because they think it is cleaner than river water.

Pak Jumari, 35, is a leader of a community group living along the Ciliwung River, which runs north for 97km from the West Java city of Bogor. Since 2010 he has been using a boat to keep his own section of the Ciliwung clean by scooping out rubbish. “We find many detergents and soaps in the river, “he said. “We no longer use it for washing or drinking.”

Fishermen on the Ciliwung use “blast fishing” – bombs made of kerosene and fertilizer to kill fish so they are easier to catch – which has worsened pollution. Nevertheless, his community still fishes in the river, with few reported ill effects, he said.”

Read more: IRIN

lily victoria

Elwha sediment not just mud, it’s nourishment

Published on 04/30/2012 in aquatic ecosystems, dam removal and hydrology. 0 Comments Tags: , , , , .

Retrieved from: Seattle times

“The sediment loads in the Elwha River are spiking because the reservoir behind former Elwha Dam is now completely gone. That means the settling of fines that used to occur in the lake is no longer happening so all that material is pouring into the river, and heading on down to the Strait of Juan de Fuca. It’s a dramatic sight.

“The distinct line is caused by the difference in density between the fresh water of the Elwha and the salt water of the Strait of Juan de Fuca. The heavy sediment loading is coming primarily from the area that used to be Elwha Dam. In this photo the Elwha River, right, meets the Strait of Juan de Fuca. The plume is flowing east with the tide — up, in this photograph, as Roorda flies north.

“And while the amount of sediment is large — about 50 times normal levels for the Elwha — don’t call it mud. Sediment is a single word for a whole range of material that the river has been depositing behind the two dams for the past 100 years: rocks, gravel, cobble, sand, silt, and clay. About 40 percent of that material is expected to eventually make its way out to sea.

“Restarting the river’s natural transport capacity is one of the most important aspects of Elwha River recovery. Big mountain rivers like the Elwha eat a steady diet of wood and rocks and sand and gravel, moving the material with the energy of their perpetual flow down gradient to the sea. Wood and sediment rebuild the natural structure and complexity of the riverbed: meanders, side channels, gravel bars, pools and riffles. A big mountain river like the Elwha naturally transports a fantastic amount of material — but it’s all been stuck up behind the dams, some 24 million cubic yards worth. Well now with the dams coming out — and Elwha Dam already completely gone — that material is on the move.”

Read more: Seattle times

sammykayed

Salmon revival in sight as Elwha River dams fall in U.S. Northwest

Published on 04/29/2012 in aquatic ecosystems, dam removal, dams, displacement of people, hydrology, hydropower, policy, riparian zone, rivers and species extinction. 0 Comments Tags: , , .

Photo retrieved from: www.reuters.com

“The two dams, about 80 miles northwest of Seattle, blocked migratory routes of salmon and steelhead trout to some 70 miles of tributary habitat, in the process robbing Native Americans of income by halting a treaty-guaranteed reservation fishery.

The river teemed with thrashing pink salmon before the Elwha Dam was built to generate electricity for the nearby mill town of Port Angeles, with a current population of around 19,000, and later, to a naval shipyard in Bremerton, about 80 miles away.

The Elwha Dam’s removal, completed in late March, was hailed by Governor Christine Gregoire as a significant environmental milestone that “shows what happens, when against many odds, a river is restored to its natural beauty.”

Supporters of the dam’s destruction say the benefits to the environment of tearing it down outweigh the loss of its aging power-generating station.

The destruction of the Glines should be finished in about a year to 18 months, ending the biggest dam demolition in U.S. history.

The removal of the two dams – ordered by a 1992 law signed by then-President George H.W. Bush – is aimed at restoring the natural habitat of more than 300,000 salmon. Economic and environmental impact analyses delayed the project’s start.”

Read more: Reuters

lily victoria

Warm Spring May Mean Drought and Wildfires in West

Published on 04/27/2012 in climate change, displacement of people, drought, hydrology, rivers and tap water. 0 Comments Tags: .

Photo retrieved from: www.nationalgeographic.com

“On April 10th, 61 percent of the lower 48 states were listed by the U.S. Drought Monitor to be in abnormally dry or drought conditions. And the Southwest, which largely relies on ice melt into the Colorado River Basin from the Rocky Mountains and previous years’ melt stored in the Lake Powell and Lake Mead reservoirs for its water supply, is poised for a dry, hot summer, because those areas received less than 70 percent of the average snowfall according to the USDA National Water & Climate Center.

These reservoirs are already at only 64 percent capacity following a decade-long drought from 2000 to 2010. And the possibility of more drought years to come is raising concerns over how to manage a river of which every drop (and then some) is now allocated to some use.

Drought, however, may be only one factor in the drying up of the Colorado River Basin. To assess the vulnerabilities of the watershed and consider how water supply and demand might change in the coming years, the U.S. Department of the Interior’s Bureau of Reclamation has embarked on a study of the Colorado River Basin to be released this July. An interim report shows that current water use outstrips the supply and projected demand for water could be greater than the projected supply by more than 3.5 million acre-feet within 50 years, particularly when the effects of climate change are included.”

Read more: National Geographic

 

lily victoria

The Water Fight That Inspired ‘Chinatown’

Published on 04/25/2012 in agriculture, dams, greenwashing, hydrology, policy, privatization, rivers, tap water, water diversions and water wars. 0 Comments Tags: , , , , .

William Mulholland. Photo retrieved from: www.nytimes.com

“When 95 percent of the water rights along the river were in the hands of Mulholland’s department, an aqueduct some 233 miles long was built to take the water to the city. But because the amount that was flowing to Los Angeles was more than it could use, Owens Valley water soon made the San Fernando Valley bloom and enriched inside investors who were champions of Mulholland’s plans. (The relevant line from the movie, spoken by Jack Nicholson’s character, J.J. Gittes: “Do you have any idea what this land would be worth with a steady water supply? About $30 million more than they paid for it.”)

Eventually Los Angeles incorporated those farmlands into its boundaries. In an effort beginning in 1905, Dr. Libecap reports, the city acquired the land and water rights of 1,167 Owens Valley farms comprising 262,000 acres for about $20.7 million. (The latter figure is the equivalent of more than $220 million today.)

The one serious misjudgement in Mulholland’s plan was his calculation of how fast the newly watered city would outgrow the initial infusion of water. So Mulholland and Los Angeles came back for more of the river in 1926 and 1927, and some local farmers responded by repeatedly blowing up the pipeline. Mulholland then sent dozens of armed guards to protect his aqueduct. Soon, agricultural resistance dissipated. But the legend of injustice persisted.”

Read more: New York Times

 

lily victoria

Study reveals groundwater resources in Africa

Published on 04/24/2012 in climate change, groundwater, hydrology and management. 0 Comments

Photo retrieved from: www.bgs.ac.uk

“The largest groundwater volumes are found in the large sedimentary aquifers in the North African countries Libya, Algeria, Egypt and Sudan,” “the scientists said in their paper, published on Friday.

They estimate that reserves of groundwater across the continent are 100 times the amount found on its surface, or 0.66 million cubic kilometres.

Writing in the journal Environmental Research Letters, they cautioned, though, that not all of the reserves are accessible.

Where they are, small-scale extraction by hand pump would be better than large-scale drilling projects, which could quickly deplete the reservoirs and have other unforeseen consequences.

Extraction complications

Groundwater is no panacea for Africa’s water shortages but it could form an important part of a strategy to cope with an expected sharp increase in demand for water as the continent’s population increases.

Even now, some estimates put the number of Africans without access to safe drinking water at more than 300 million and only 5 per cent of arable land is irrigated.”

Read more: Aljazeera

 

lily victoria