Archive for the 'dams' Category

Malaysian Indigenous Communities Demand Referendum on Mega-Dams

Photo retrieved from: www.networkblogs.com

“The 110 meter (360 foot) high dam in Batang Ai National Park in Sarawak, financed by the Asian Development Bank, began operating in 1985. It caused the displacement of some 3,000 people from 26 longhouses. These people have been relocated to cultivate cocoa and rubber but the program has not been successful, says Amarhit Kaur, author of “A History of Forestry in Sarawak.”

The Bengoh dam on Sarawak’s Kiri River is expected to be completed by the end of 2012. Some 250 families involving 1,500 people from four villages are rejecting the government’s resettlement plans to give each family a free house and three acres near the dam. Instead, they preferred to resettle themselves on higher ground upstream of the dam on their traditional territory.

The 63 meter (206 foot) high Bengoh dam is expected to submerge about 8.72 square kilometers (3.3 square miles) of land. Wildlife habitat will be destroyed, affecting two species of hornbill and 50 other species of birds, seven species of bats, 14 species of mammals and 52 species of fish.”

Read more: Earth First!

 

Ethiopia’s tribes cry for help

Photo retrieved from: www.aljazeera.com

“Violent clashes between the Ethiopian army and tribes from the region are on the rise. A local human rights worker told me of their fears of an escalation in the crisis to civil war. “Many tribes are saying they will fight back rather than be moved off their traditional lands to make way for these plantations. They are living in fear but feel they have nothing to lose by fighting back.”

Roadblocks are now in place in many parts of the Lower Omo Valley, limiting accessibility and ensuring the relocations remain out of the spotlight. Tribal rights NGO Survival International is leading calls for a freeze on plantation building and for a halt to the evictions. They have been campaigning to draw more attention to the deteriorating situation in the region since the Ethiopian government announced plans for the Gib III Dam [PDF] – Africa’s tallest, and one that is scheduled for completion later this year.

When completed, it threatens to destroy a fragile environment and the livelihoods of the tribes, which are closely linked to the river and its annual flood. Up to 500,000 people – including tribes in neighbouring Kenya – rely on the waters and adjacent lands of the Omo River and Lake Turkana, most of which lies in Kenya. The Karo people, now estimated to number just 1,500 along the eastern banks of the Omo River, face extinction. Already suffering from dwindling fish stocks as a result of the dam, the reduced river levels have also harmed their crop yields.”

Read more: Aljazeera

 

Chinese dam triggers earthquake, rattles Hong Kong

Photo retrieved from: www.wikipedia.com

“Zhong Yijun, the vice director of the Guangdong Provincial Seismological Bureau, told China News Service (Zhongguo xinwen she), today’s earthquake in Hong Kong was caused by the filling of the Xinfengjiang reservoir.

The magnitude 4.8 quake, which hit at 2:34 AM local time, occurred in Heyuan prefecture in the northern part of Guangdong Province and could be felt in Guangzhou, Shenzhen and Hong Kong. There were no reports of injuries.

This isn’t the first time the dam has triggered a temblor. Xinfengjiang caused China’s largest and most famous reservoir-induced seismic event in 1962 when it triggered a 6.1 magnitude earthquake that toppled buildings and cracked the dam.

The phenomena, known as “reservoir-induced seismicity” (RIS), occurs when a full reservoir creates extra pressure in the micro-cracks and fissures in the ground under and near the reservoir, in essence lubricating them. When the reservoir is drawn down, the friction caused by the mass of the reservoir relaxes, allowing slippage to occur.”

Read more: Probe International

 

Tibetan Village Stops Mining Project Near the Nu River

Photo retrieved from: www.internationalrivers.org

A Nu Challenge Looms for Ethnic Groups

After the villagers of Abin successfully canceled the mining project near the Nu River in January, they claimed the mountain itself had played a role. In these remote regions of western China, where many non-Han ethnicities reside, traditional views and nature worship can still be found. But while Abin was successful, development projects continue to be a looming threat to the traditional livelihoods of thousands of ethnic villagers living along the Nu River valley.

In particular, the 13-dam cascade first proposed in 2004 has returned to haunt the landscape, as seen through the roadwork, tunnels, and make-shift workers huts and equipment springing up along the Nu River. The watershed is home to thirteen different ethnic groups, most of whom are subsistence farmers. As many as 50,000 largely Lisu, Tibetan and Nu villagers would lose their farmland and be forced to move to prefabricated houses in new towns and look for work. Moreover, China has been reluctant to accord its ethnic minority nationalities “indigenous” status under the UN Convention on Biological Diversity, which recognizes the rights of indigenous people to prior consultation and consent. The dams would even wipe out portions of the pilgrimage route around Mount Kawagebo – a serious blow to the Tibetans both in and outside the area. As one ethnic Tibetan told the New York Times in 2007:”

“If people are forced to move because of the project, they are going to lose the way of life that makes them special. It’s inevitable that people will lose their traditions if they move away.”

Read more: International Rivers

 

Kariba Dam Wall On Zimbabwe Side Risk Collapsing:Mangoma

Karima dam. Retrieved from: www.radiovop.com

“I repeat that the wall on the Zimbabwean side is weak and requires anchoring and this is being attended to. It is something that is high on the agenda because without the dam wall you really have nothing,” “Mangoma said.

The Kariba dam on the Zambezi River is one of the largest dams in the world, standing 128 m tall and 579 m long. The dam was built by Italians between 1955 and 1959 during the colonial time when Zimbabwe was still called Rhodesia. It borders with Zimbabwe’s northern neighbour Zambia which also generates electricity on the dam.

At the time of the construction of the dam several people and animals were killed forcing authorities to embark on an “Operation Noah” aimed at saving thousands of animals while over 57 000 people were relocated to safer areas away from the flooding rising water.”

Read more: Radio VOP

Uganda Hydropower Plant Plan Hits Funding, Technical Snags

Retrieved from: www.culturalsurvival.org

“Plans by Uganda to start building the planned 700 MW Karuma hydropower project this year have been thrown into jeopardy, following disagreements with would-be financiers over the design and capacity of the plant.

Days after the East African nation abolished subsidies in the energy sector, prompting a huge rise in the cost of electricity, the potenial financiers, including the Germany Development Bank, the World Bank and the European Investment Bank, stated that it was not realistic that the water flow at Karuma would sustain the generation of 700 MW.

They argued that it did not make economic sense for Uganda to invest heavily in the project when it was clear the plant would only achieve full capacity during specific periods. The project has a $1.3-billion price tag.”

Read more: Engineering News

 

Water grid bosses back doubts over dam story

Wivenhoe Dam strains to hold back flood water in January.

Retrieved from: Brisbane times

“The operators of Brisbane’s biggest dam may have waited two days longer than claimed to proceed to a key water release strategy in the lead-up to the city’s devastating flood, two senior water grid officials have told an inquiry.

“The flood commission, headed by Court of Appeal judge Catherine Holmes, is holding 11th hour hearings to test Seqwater’s assertions about when Wivenhoe Dam engineers moved to a “W3” strategy, which allows more rapid releases and prioritises the protection of urban areas such as Brisbane.

“Dam engineers have argued they moved directly from W1 – when low-lying rural bridges are prioritised – to W3 at 8am on Saturday, January 8, 2011, as required in the official dam manual.

“It is not in dispute that the most serious strategy, W4, was activated on Tuesday, January 11, when large amount of rainfall forced operators to massively ramp up releases from the dam.

“Thousands of homes were inundated when the Brisbane River flood peak occurred on the morning of Thursday, January 13.”

Read more: Brisbane times

Sudan Dam Protest At President’s Doorstep

Photo retrieved from: www.news.carbon-future.co.uk

“We call for the rights of people affected by the dam,” their signs said.

“The peaceful protesters dispersed at the request of security officers.

It is the latest gathering in Khartoum by supporters of residents
displaced by the Merowe dam. City police forcibly broke up two
sympathetic demonstrations in December.

On November 20, about 1,000 people affected by the hydroelectric project
began a sit-in at Al-Damer, a town around 300 kilometres (180 miles)
north of Khartoum, over the government’s alleged failure to compensate
them with new homes as promised.

The sit-in continues.

Completed in 2009 at a cost of more than $2 billion (1.5 billion euros),
the Chinese-built development, northwest of Al-Damer, doubled Sudan’s
power generation capacity.

But it also forced 15,000 families from their homes three years ago to
make way for the dam and the huge reservoir that formed behind it.”

Read more: Dam and Alternatives

 

Super models – using maths to mitigate natural disasters

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Photo retrieved from: theConversation.edu.au

“Last year will go on record as one of significant natural disasters both in Australia and overseas. Indeed, the flooding of the Brisbane River in January is still making news as the Queensland floods inquiry investigates whether water released from Wivenhoe Dam was responsible. Water modelling is being used to answer the question: could modelling have avoided the problem in the first place?

This natural disaster – as well as the Japanese tsunami in Marchand the flooding in Bangkok in October – involved the movement of fluids: water, mud or both. And all had a human cost – displaced persons, the spread of disease, disrupted transport, disrupted businesses, broken infrastructure and damaged or destroyed homes. With the planet now housing 7 billion people, the potential for adverse humanitarian effects from natural disasters is greater than ever.

Here in CSIRO’s division of Mathematical and Information Sciences, we’ve been working with various government agencies (in Australia and China) to model the flow of flood waters and the debris they carry. Governments are starting to realise just how powerful computational modelling is for understanding and analysing natural disasters and how to plan for them.

“So how does it work?

Well, fluids such as sea water can be represented as billions of particles moving around, filling spaces, flowing downwards, interacting with objects and in turn being interacted upon. Or they can be visualised as a mesh of the fluids’ shape.”

Read more: The Conversation

The Real Cost Of Brazil’s Dam

Photo retrieved from: www.survivalinternational.org

“Until a few months ago, the future of the Belo Monte dam seemed in doubt. The project faced a wave of legal battles and opposition from indigenous groups and environmental organisations around the world.

About 400 square kilometres of the Amazon forest will be flooded to make way for the reservoirs.

The dam is being built in Brazil’s northern Para state, home to large parts of the Amazon Rainforest.

Some 25,000 indigenous people live along the banks of the Xingu River.

One indigenous group – the Paquicamba – live downstream from the main dam. If the dam is built, the normal flow of the river would shrink significantly. The Paquicamba say their fish stocks would be severely depleted.”

Read more: Aljazeera