Proceedings of the output on the Causse de Labruguière (RNA)
Editor of the record: Patrick Cabrol
Wednesday, February 8, 2011.
Participants: Patrick Cabrol (DREAL) - Jean-Pierre PLANTY (SCMNE)
Duration: from 12:30 to 17:30 (5:00)
Purpose: inventory of the karst limestone plateau Labruguière.
Work done:
Morning
By late morning, I went for a walk and to eat the farm Roumégas. This allowed me to find a resurgence (5 liters / s), which was not known Jean-Pierre. After checking the next day by Jean-Pierre, it turns out that this is the loss of water located near the network Jean-Marie Coste.
Afternoon:
We started our visit a living (almost Roubinarié), whose house is built on a cave 14 meters deep at the bottom of which flows an underground stream. The neighboring house is currently in crack two.
A little further down the construction of a hangar was accompanied by a falling construction equipment.
Below, the National Highway 621 was opened and a truck could get stuck! (In the 60 or 70). Here, we used the dowsing rods to see what it gave, Jean-Pierre and me to go back to the other side of the road. The responses were identical sticks (I was the first surprise!)
We went to Caucalières (source Theron and loss of Thor), then we continued on Lardicou (resurgence little dry today and collapse ).
We continued right bank, the search for cavities along the Thore (at about the mill), and we were wrong by 1 km. This allowed us to discover by chance, an area of cliff edge of Thore, where many small cavities are impenetrable to 100 meters (downstream of the causeway Bonnery, which is equipped with a pumping station). This means that a network needs to happen in this area, and that is not listed.
We left towards the village of En Sire, to record losses and various phenomena, known as Jean-Pierre. We ended the great resurgence in sire, where we were surprised to discover that the small collapse that measured 1 m in diameter and 50 cm deep, six months ago, is now 2 m in diameter and one meter in background, with a crack that extends between two boulders on a good meter longer (between resurgence and the Loss of Resse). We had no lamp or business to see what was happening.
I was surprised to note that the stream of Resse debit at this location, about 20 to 30 liters seconds, then it delivers 3-5 liters seconds in the garden of one resident, 500 meters above. Various phenomena we have therefore surely missed.
Friday, February 10, Jean-Pierre went to City Hall Labruguière to see the Land Registry from the list of caves on the site of BRGM. Nothing matches, there are common errors, the localities are not found, etc. ...
examine everything very seriously.
Next working day: Sunday, February 13th at 1:00 p.m. at Jean-Pierre.
I think we have them for 5-6 days of work again, at a rate of half a day as we are doing now, to save Jean-Pierre. I still have a lot of work on the various cavities inventories published on the sector. It is difficult usable, but try to find the maximum of points. This plateau appears to be changing very quickly. Everything must be archived.
Afternoon:
We started our visit a living (almost Roubinarié), whose house is built on a cave 14 meters deep at the bottom of which flows an underground stream. The neighboring house is currently in crack two.
A little further down the construction of a hangar was accompanied by a falling construction equipment.
Below, the National Highway 621 was opened and a truck could get stuck! (In the 60 or 70). Here, we used the dowsing rods to see what it gave, Jean-Pierre and me to go back to the other side of the road. The responses were identical sticks (I was the first surprise!)
We went to Caucalières (source Theron and loss of Thor), then we continued on Lardicou (resurgence little dry today and collapse ).
We continued right bank, the search for cavities along the Thore (at about the mill), and we were wrong by 1 km. This allowed us to discover by chance, an area of cliff edge of Thore, where many small cavities are impenetrable to 100 meters (downstream of the causeway Bonnery, which is equipped with a pumping station). This means that a network needs to happen in this area, and that is not listed.
We left towards the village of En Sire, to record losses and various phenomena, known as Jean-Pierre. We ended the great resurgence in sire, where we were surprised to discover that the small collapse that measured 1 m in diameter and 50 cm deep, six months ago, is now 2 m in diameter and one meter in background, with a crack that extends between two boulders on a good meter longer (between resurgence and the Loss of Resse). We had no lamp or business to see what was happening.
I was surprised to note that the stream of Resse debit at this location, about 20 to 30 liters seconds, then it delivers 3-5 liters seconds in the garden of one resident, 500 meters above. Various phenomena we have therefore surely missed.
Friday, February 10, Jean-Pierre went to City Hall Labruguière to see the Land Registry from the list of caves on the site of BRGM. Nothing matches, there are common errors, the localities are not found, etc. ...
examine everything very seriously.
Next working day: Sunday, February 13th at 1:00 p.m. at Jean-Pierre.
I think we have them for 5-6 days of work again, at a rate of half a day as we are doing now, to save Jean-Pierre. I still have a lot of work on the various cavities inventories published on the sector. It is difficult usable, but try to find the maximum of points. This plateau appears to be changing very quickly. Everything must be archived.
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