Showing posts with label hydroelectricity. Show all posts
Showing posts with label hydroelectricity. Show all posts

21 January 2007

Mendoza's water craze

Mendoza, like most of the places just east of the Andes, is extremely dry. The humidity that blows in from the Pacific Ocean mostly causes precipitation in Chile and doesn't make it across the nearly 7,000-meter-high Andean ranges. However, there are a number of important glacial rivers that grow when the ice melts up there. The people of Mendoza have taken advantage of these rivers: they've dammed them in several points, forming reservoirs (artificial lakes), deriving water for irrigation, and generating hydroelectricity. I visited several of these reservoirs during my vacations.

The first one is the largest dam, called El Nihuil. It is the first dam on the Atuel River, near the city of San Rafael. The dam is located at about 1,250 m above mean sea level, just at the point when the river enters a canyon.

Embalse El Nihuil

El Nihuil traps the waters and derives the flow through a series of tunnels excavated in the mountains (they took 25 years to complete!), to a series of four hydroelectrical power stations downstream. The original course of the Atuel along the canyon is barely visible; the river vanishes completely in many places.

Then you have the Valle Grande reservoir:

Embalse Valle Grande

The rock formations in the center of the lake receive the name of El Submarino ("The Submarine") and, according to our tour guide, they're in every touristic pamphlet about San Rafael.

Once the Atuel has fulfilled its duties as a hydropower generator, it can be used for other activities, such as rafting. We did some of that, though it was only level II in the scale of river difficulty (with a maximum of VI for rivers that cannot be navigated at all).

Besides these huge engineering works, the importance of water can be seen throughout Mendoza. All the cities have ditches running along each side of the street that serve as irrigation channels; every now and then you find a system to manually stop the flow. The ditches (acequias) turn into channels and more ditches in the countryside. Of course, there aren't many thing that can grow there easily — mostly grapes and olives. I assume there must be some control as to how each farmer gets his or her water from the collective ditches.

In Mendoza City people are already complaining that the recently-built Potrerillos dam, with its 14-km-long reservoir, is making the town more humid. There are actually mosquitoes in Mendoza now; I spent two nights there with a humid heat that reminded me of Rosario. Further south the problem is not that big, and in Malargüe the aridness of the landscape was impressive. The Malargüe River, which is the most important in an area of more than 30,000 km², would be called a little stream here in the Argentine littoral, but it manages to serve a small city... provided you don't take long showers. In the places I stayed, the toilets didn't flush a large discharge automatically — you needed to keep pressing the thingy in order to keep the water flowing.

21 December 2006

End-of-year potpourri

Lots of news today... The end-of-the-year balance is coming for the whole country. Things look better, certainly unimaginably better than they looked five years ago... Exports are up, GDP increase looks like it will be around 9% again, and Argentina is officially out of hell according to K. This exhuberant growth has its downside, like more energy consumption (let's not go there again) and too many fish being fished. With regards to the latter, the government has just banned exports of fish of the Paraná River starting on the first day of 2007 and for eight months. Maybe we can still save those sábalos after all.

Not so far from here, and notwithstanding the outrageous statements of the power company president, the folks at the commune of Armstrong have come up with the idea of generating hydroelectricity on the Carcarañá River. Armstrong is a small city (est. pop. 12,000) with a lot of industries, and the projected hydroplant would supply 40% of its power needs.

On the local front, the Municipality of Rosario got its 2007 budget approved, with a AR$17 million deficit... In the meantime, the legislators voted to study the issue of the urban bus fee, which is AR$0.95 now and could increase to AR$1.20 before March. That's really not good news, but with bus drivers that earn more than lawyers and doctors, there's no simple alternative. The national government subsidizes the fuel for urban buses, but due to a clever manipulation of the formula used to calculate the proportions, most of those subsidies go to Buenos Aires, where bus fees are already ridiculously low. Some nice folks with their faces covered and toting sticks came to the Deliberative Council, defaced it, broke windows and created their usual mess, while the police watched.


This is becoming serious; yesterday a group of protestors hijacked a bus, claiming they had an "agreement" not to pay their tickets, and then blocked the road for hours. Another group planted a picket on the railways and stopped a train (coming from Tucumán and Córdoba, headed for Buenos Aires) for 40 minutes, demanding to be given "Christmas packages".

The people commemorating the 5-year anniversary of the Argentinazo (see my previous post) in Rosario painted all over the local seat of the provincial government, mixing their demands for justice with accusations against former governor Carlos Reutemann (calling him "murderer" for his responsibility in the murder of social worker Pocho Lepratti by the police, and "flooder" for doing nothing to prevent the 2003 flood of Santa Fe). Reutemann was the political child, protégé and faithful disciple of Carlos Menem; a former F1 racecar driver, he was inexplicably popular with the masses but had the charisma and the innovative spirit of an Egyptian mummy; he deserves every epithet -- only there's no need to deface a building to note that.

Back to the protestors -- many of these are piqueteros in general, but that term has become rather vague. The original piqueteros were unemployed people desperately protesting their predicament; these "modern" ones are 95% chronically unemployed bums, welfare mothers with their children, people from the slums who have nothing better to do and are tempted by the possibility of getting free food, and a lot of violent resentful young men with nothing to lose encouraged by the government policy of letting them do whatever they want (short of physically attacking other people, and sometimes even that). They're led by a few talking heads armed with basic Marxist or anarchist rhetoric, and what I'd call low-level politicians -- they can't organize a party, but they can gather a gang under a banner.

The personal front
I'm trying to put this chaotic end of the year into perspective. Somehow news have been piling up on me lately. I'd vowed not to let interesting/important things pass without mentioning them here, so that's why I wrote this post. Maybe I'm forgetting other important things, only because I'm not sure how personal stuff would sit with my readers. What can I say? Apart from the bad taxi service, the blackouts, the politicians, the piqueteros, the heat, and the hail, this has been a good year overall, if anything because I'm learning to cope with the frustration produced by things like the aforementioned, and others which I prefer to stay silent about. That, and I had a superb icecream cone today, at the very hottest time of day. What more can I ask?