Difference between revisions of "Manzanares"
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| + | =Manzanares = | ||
| − | + | <googlemap version="0.9" lat="40.7416970923627" lon="-3.88946056365967" zoom="15" scale="yes" overview="yes" controls="large"> </googlemap> | |
| − | + | ||
| − | + | ||
| − | <googlemap version="0.9" lat=" | + | |
{{forecasterTemplate | {{forecasterTemplate | ||
| − | |site_name=Manzanares | + | |site_name=Manzanares |
| − | |river_name=Manzanares | + | |river_name=Manzanares |
| − | |river_type_name=large slow-flowing river over sand/clay | + | |river_type_name=large slow-flowing river over sand/clay |
| − | |country=ES | + | |country=ES |
| − | |altitude=mid-altitude: 200 - 800 m | + | |altitude=mid-altitude: 200 - 800 m |
| − | |catchmentarea=medium: > 100 - 1000 km2 | + | |catchmentarea=medium: > 100 - 1000 km2 |
| − | |geology=Siliceous | + | |geology=Siliceous |
| − | |latitude= | + | |latitude=40.7416970923627 |
| − | |longitude=-3. | + | |longitude=-3.88946056365967 |
|natcode=SP | |natcode=SP | ||
|pressures=Morphological alterations<br> Presence of downstream artificial barriers on the catchment scale<br> Artificial barriers upstream from the site<br> Artificial barriers downstream from the site<br> | |pressures=Morphological alterations<br> Presence of downstream artificial barriers on the catchment scale<br> Artificial barriers upstream from the site<br> Artificial barriers downstream from the site<br> | ||
|measures=Structural modifications<br> Modify/replace existing structures<br> | |measures=Structural modifications<br> Modify/replace existing structures<br> | ||
|size=0 | |size=0 | ||
| − | |size_unit=ha | + | |size_unit=ha |
|costs= 0 | |costs= 0 | ||
| − | |costs_unit= EUR | + | |costs_unit= EUR |
|synergy=- | |synergy=- | ||
| − | |status_name= Realised | + | |status_name= Realised |
| − | |period= 2000 | + | |period= 2000 |
|evaluation=No | |evaluation=No | ||
|organization= | |organization= | ||
}} | }} | ||
| + | This case study has been described by Arenillas-Girola(2008).<ref>Arenillas Girola, Lidia, 2008. The Manzanares river restoration (northern Madrid-Spain): demolition of an obsolete dam and riverine ecosystem rehabilitation. 4th ECRR Conference on River Restoration, Venice, Italy, June 2008. <br>'''DOWNLOAD full paper''' [[Media:S1_4_Arenillas Girola.pdf]]</ref>. Here below we present the abstract of the paper: | ||
| + | <br> | ||
| + | <br> | ||
| + | Manzanares river, in the Tajo basin, has its source within the mountains of the | ||
| + | Sistema Central chain, located in the northern part of the Madrid region. During the | ||
| + | first few kilometers, the river flows across an area where the granite geology and the | ||
| + | pristine nature are so interesting and unique, that has been declared as a Regional | ||
| + | Park and as well as an UNESCO Biosphere Reserve since 1992. | ||
| + | In the heart of this area, during the decade of the 40s, a dam was built in the | ||
| + | Manzanares river in order to supply water to the village located downstream. Year | ||
| + | by year the dam has accumulated such a big quantity of sediments coming from the | ||
| + | granite banks and slopes, that at the end of the century it was completely full of | ||
| + | sand, in such a way that it became useless and an ecological disaster. | ||
| + | The Confederación Hidrográfica del Tajo (the river basin authority) in collaboration | ||
| + | with other authorities, stated as an achievement this dam demolition. The target was | ||
| + | to give back to the river the natural features it had before the dam construction. | ||
| + | As the dam was located in a protected area, one of the goals was to preserve -as far | ||
| + | as possible- all the natural values of the surroundings, trying to accomplish all the | ||
| + | works without damaging the river bed, the banks and the areas nearby, keeping as | ||
| + | well flora and landscape features. The works were carried out in three stages: in each | ||
| + | one the target was the demolition of a part of the dam through different controlled | ||
| + | detonations and then the waste removal. This task was carried out through an | ||
| + | helicopter, as the path between the river bank and the granite slope was so narrow | ||
| + | that a heavy machine would have caused a significant destruction of it. | ||
| + | The last goal was to restore the river bed and banks that had been affected by the | ||
| + | dam -while existing- and the demolition works. During this stage the tasks were just | ||
| + | a light reforestation and not much more, as the river flow was able to remove the last | ||
| + | sand particles that had been retained near the old dam. | ||
| + | |||
| + | |||
| + | '''References:''' | ||
| + | <references /> | ||
[[Category:Case_studies]] | [[Category:Case_studies]] | ||
| + | [[Category:Morphological conditions river depth and width variation]] | ||
Latest revision as of 13:05, 24 November 2010
Manzanares
This case study has been described by Arenillas-Girola(2008).[1]. Here below we present the abstract of the paper:
Manzanares river, in the Tajo basin, has its source within the mountains of the
Sistema Central chain, located in the northern part of the Madrid region. During the
first few kilometers, the river flows across an area where the granite geology and the
pristine nature are so interesting and unique, that has been declared as a Regional
Park and as well as an UNESCO Biosphere Reserve since 1992.
In the heart of this area, during the decade of the 40s, a dam was built in the
Manzanares river in order to supply water to the village located downstream. Year
by year the dam has accumulated such a big quantity of sediments coming from the
granite banks and slopes, that at the end of the century it was completely full of
sand, in such a way that it became useless and an ecological disaster.
The Confederación Hidrográfica del Tajo (the river basin authority) in collaboration
with other authorities, stated as an achievement this dam demolition. The target was
to give back to the river the natural features it had before the dam construction.
As the dam was located in a protected area, one of the goals was to preserve -as far
as possible- all the natural values of the surroundings, trying to accomplish all the
works without damaging the river bed, the banks and the areas nearby, keeping as
well flora and landscape features. The works were carried out in three stages: in each
one the target was the demolition of a part of the dam through different controlled
detonations and then the waste removal. This task was carried out through an
helicopter, as the path between the river bank and the granite slope was so narrow
that a heavy machine would have caused a significant destruction of it.
The last goal was to restore the river bed and banks that had been affected by the
dam -while existing- and the demolition works. During this stage the tasks were just
a light reforestation and not much more, as the river flow was able to remove the last
sand particles that had been retained near the old dam.
References:
- ↑ Arenillas Girola, Lidia, 2008. The Manzanares river restoration (northern Madrid-Spain): demolition of an obsolete dam and riverine ecosystem rehabilitation. 4th ECRR Conference on River Restoration, Venice, Italy, June 2008.
DOWNLOAD full paper Media:S1_4_Arenillas Girola.pdf
