Showing posts with label dam. Show all posts
Showing posts with label dam. Show all posts

Saturday, 19 January 2013

Audit slams Sour Korea's $20 billion river project

Space Daily: South Korea's state auditor on Friday panned President Lee Myung-Bak's $20 billion effort to dredge, dam and beautify four major rivers, saying it was riddled with costly flaws. Revitalising the Han, Nakdong, Geum and Yeongsan rivers was the centrepiece of the outgoing president's "Green New Deal", a bold plan to create jobs after the 2008 global downturn.

Started in 2009, the 22.2 trillion won ($20.1 billion) project saw the construction of 16 weirs and dams along the four rivers that were straightened and dredged to improve water quality and prevent flooding. But a report by the Board of Audit and Inspection (BAI) suggested the three-year effort had fallen far short.

"Due to faulty designs, 11 out of 16 dams lack sturdiness, water quality is feared to deteriorate... and excessive maintenance costs will be required," the report said. The government minister in charge of the project, Kwon Do-Youp, insisted that additional work to repair structural weaknesses was already close to completion...

Overlooking the Han River, shot by elaine ross baylon, Wikimedia Commons via Flickr, under the Creative Commons Attribution 2.0 Generic license

Saturday, 29 December 2012

The day the dam broke--a Carbon Based original

    On December 26 in a local church, a neighbor read several stories by James Thurber.  One of these was "The Day the Dam Broke," which recounts a stretch of two hours in 1913 when sudden rumors of a failed dam in Columbus, Ohio, provoked a mass panic.  Thurber says, "The fact that we were all as safe as kittens under a cook stove did not, however, assuage in the least the fine despair and the grotesque desperation which seized upon the residents of the East Side when the cry spread like a grass fire that the dam had given way." 

    To comic effect, Thurber dwells on the terror that erupts instantly and the citizens' shamefaced return to their lives when no waters appear.  (Actually, a similar theme crops up in a number of Thurber stories, such as, "The Night the Bed Fell Down.")

    Residents fled east to avoid the rushing waters of the Scioto River. There were none. Authorities worsened the alarm.  Soldiers patrolling the streets announced that the dam had NOT failed.  Everyone heard as, "The dam has NOW failed.

    But were the citizens of Columbus so irrational to flee? Dams do break, and it's usually disastrous when they do.  In fact, in a real dam break, everyone downstream must act quickly to reach higher ground.  Thurber observes that everybody ran because the starting the cars of that era required a crank, and presumably that took too much time with an inundation gushing at one's heels.  

    The irrational part lay in not bothering to check for water, even after some minutes.  But coastal dwellers today, if they heard a tsunami warning, would remember the horrifying YouTube videos of the Aceh tidal wave coming ashore in 2010.  They would flee in an instant. I know I would.

    Nothing in Thurber's story considers the dam's soundness and its state of repair, or the quality of its management.  But presumably, after the panic of 1913, the leaders of Columbus probably checked the dam and made inquiries into what they could do to prepare for an actual dam break.  But that's a much less amusing story.

    This is how everyone wants climate change to turn out -- a hasty alarm that we slink away from when its foolishness is revealed. But of course, that doesn't fit the climate change pattern.  Evidence from direct observations, the paleoclimate record, and climate models all corroborate anthropogenic global warming.   This means intensified water cycles, more weather-related disasters, and a variety of other effects.

    What's more pertinent is speed. Climate change as a whole does not suddenly appear full blown. It builds slowly and on any given day doesn't impinge on people's minds or their lives. A catastrophe right in front of us grabs all our attention, but sorting out the climate signal it contains is not so obvious, nor is it the most pressing task when the waters are rising. 

    The analogy between Thurber's story and climate change would be even better if there were a well-funded movement in Columbus whose goal was to stop any effort to maintain the dam. Actually, something similar has happened to infrastructure in the United States, as state and local governments have allowed bridges, roads, dams, water treatment plants, and so on to fall into disrepair.  Decades of skimped maintenance has resulted in degraded service and outright failures.  The American Society of Civil Engineers gives US infrastructure a "D," and estimates a five-year investment of $2.2 trillion will be necessary to bring everything into good repair.

    We have time to prepare for slow-moving risks.  The cry of denialists notwithstanding, it's worth spending money today to avoid a catastrophe tomorrow.  Of course, we've already lost decades in the battle against climate change, thanks to fossil fuel industry's propaganda onslaught.  But there is still plenty we could do, and we will need to spend decades at it.

    Not long after our neighbor finished his Thurber reading, a sleeting snowstorm began, and was still underway a day later.  But everyone returned to their homes in an orderly way.

Thurber's own illustration for "The Day the Dam Broke"

Thursday, 27 December 2012

Thousands flee Malaysia floods, dam wall broken

Terra Daily via AFP: Floods triggered by torrential monsoon rains in Malaysia forced almost 14,000 people to flee their homes and seek shelter at relief centres, the official Bernama news agency said Wednesday.

Heavy rain coinciding with high tide flooded hundreds of homes in three northeastern states -- Terengganu, Pahang and Kelantan -- with some 13,746 people moved to evacuation centres, it said amid forecasts of more downpours.

Bernama said the flood situation was deteriorating as the number of evacuees continued to rise and some major roads in Pahang were closed as rivers burst their banks.

Muhammad Helmi Abdullah, the meteorological department's weather forecast director, warned that there could be more rain in Terengganu, Pahang and southern Johor state in the next few days.

"We expect intermittent rain to heavy showers in (some parts of) the states," he told AFP, adding that the northeast monsoon season would last until March and the affected states could experience at least three more "heavy rain" episodes....

A scene from a 2007 flood in Malaysia, shot by Ab Rahman, Wikimedia Commons, under the Creative Commons Attribution-Share Alike 3.0 Unported license

Monday, 3 December 2012

Amid Egypt crisis, Ethiopia pushes Nile dam

Space Daily: Ethiopia is driving to complete its massive $4.8 billion Grand Renaissance Dam on the Blue Nile amid a long-running dispute with Egypt that will likely worsen in the months ahead unless addressed.

Egypt faces destabilization as it stands to lose much of the Nile water that is its lifeblood. Ethiopia's development plans depend on an ambitious multi-dam program announced in 2011. Cairo describes this as a threat to Egypt's national security, heightening tension in the escalating battle for control over the world's longest river.

But the wave of domestic turmoil that has gripped the Arab world's most populous nation since the February 2011 overthrow of longtime dictator Hosni Mubarak, has pushed the Nile problem onto Cairo's back burner.

It's likely to be thrust even more to one side amid the tumult unleashed Nov. 23 when Mubarak's Islamist successor, President Mohamed Morsi, decreed himself near-absolute powers and immunity from legal oversight. His surprise move triggered nationwide protests and accusations he was becoming a dictator like Mubarak.

Morsi flew to Addis Ababa in July, soon after he became president, seeking to negotiate a settlement to the Nile dispute. His two-day visit was a milestone in the stormy relations between the countries but Ethiopia's strongman, Prime Minister Meles Zenawi, reportedly refused to compromise on his plan to spend $12 billion on hydroelectric projects on the upper reaches of the Nile intended to produce 40,000 megawatts by 2035....

The Nile from space

Friday, 23 November 2012

Nile dam project a hydropower hope, but regional sore point

E.G. Woldegebriel in AlertNet: Ethiopia has begun construction of a 6,000 megawatt (MW) hydroelectric dam on the Blue Nile river, a move that has been greeted enthusiastically by many Ethiopians but that is causing concern in the downstream nations of Sudan and Egypt.

The project, which is scheduled to take six and a half years to complete, is being managed by the state-owned power utility company, Ethiopian Electric Power Corporation (EEPCo). The dam is being built about 900 km (560 miles) north-east of the capital, Addis Ababa, and just 40 km (25 miles) from the Sudanese border.

Ethiopia’s government hopes to capitalize on the energy potential of a river that is revered by the Ethiopian population but that until now has not been significantly exploited to feed the country’s growing need for electric power. 

Ethiopia is the source of the Blue Nile, and its territory contributes up to 86 percent of the river’s water. The Blue Nile in turn is responsible for more than half of the water in the Nile, the world’s longest river system. The other main source, the White Nile, originates on the Ugandan side of Lake Victoria.

...Despite its popularity among Ethiopia’s population, the dam project has caused consternation in neighbouring Sudan as well as in Egypt, both downstream countries that rely upon the Nile for almost all their water and fear the dam will cause a reduction in water available to them. The new dam will eventually create a lake containing more than 60 billion cubic metres of water, twice as much as Lake Tana, Ethiopia’s largest body of water. There are also concerns about the potential environmental impact of the dam...

The Blue Nile flowing through Khartoum, via NASA