This blog started walking in January 2008 with a dual purpose. One generous disseminate and highlight our geological heritage, and other personal and professional: be on the scene. This last objective has been materialized modestly allowing me to contact some interesting people, good people who love science and the country as Xavi, author of blog geological hazards and physical geography. Xavi recently presented his thesis on the dynamics of the slopes of Montserrat and knows the area well Esparraguera. ciudad We are preparing between the two output introduction to geological hazards for those who are interested. Already have news. One place that taught me the stream is passing through Esparraguera Evil, notorious for floods of June 2000. If you make a mistake is mine. The told me perfect. District of pain Esparraguera. Point 1 is where the A2 collapsed. Point 2 is the stage prior to the passage under the highway. Torrent Evil (name indicative) ciudad born neck Can Massana, at the end of Montserrat NO. This is a low dry Mediterranean streams. Basin has a close parallel to the fault of the Lobregat when it comes to depression and fits in the littoral Quaternary materials of Pleistocene alluvial ciudad fan Collbató-Esparraguera. Reaches the village Esparraguera surrounds the north and the west, squeezed between the people and the Industrial South. The fact is that the height of the neighborhood ciudad Mal stream passes close to houses and then under the A2 motorway, and planners of these things were originally designed pipe in case of heavy rain (from those with recurrences than 100 years, for example) proved insufficient. Especially the blunder that had spread the eye than two smaller sections, so that if perhaps globally was enough (do not know), and detritus swept by the torrent (reeds, logs, rocks, cars ...) can more easily clog the pipe And it was the night of 9 to 10 June 2000. A downpour fell on Montserrat. The tubes were collapsed and the highway became a dam and upstream of the water she started to climb up the overflow, flood it and fill it with debris and sediment. Compare the old with the current steps, one piece and tip it difficult jams. After 12 years there are two feet of sediment below the step. Although not repeated any event the same intensity found little elm block size of half a meter. Imagine if it rains really bad milk. The water came up to within an inch of the garage door of the house roguenca. When the neighbors expected the worst, the low blow. Notice how the street is "fossilized" different terraces of the bed and as common sense would advise at least not built below the house white. But suddenly, the very water pressure accumulated paid steps and within moments ciudad of the reservoir is empty. But conversely, downstream there was a flash flood against ciudad the banks of the stream, partly invaded by the highway embankment. The consequences of this flash flood was felt in the morning: when a TV3 camera was telling the events of last night, all the road west of Highway s'enfondrà like a sand castle before the cameras (you can see minute 1:04 of this video).
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