ARAGÓN RIVER. NAVARRA

ARAGÓN RIVER. NAVARRA
Confluence Arga-Aragón rivers. Funes. Navarra
An exceptional
geographical
location !!
10.400 Km2
Altitude: from 18 to 2.443 m
Fuente: Environmental
European Agency. 2008
Navarra
ARAGON RIVER
1927
1956
2006
The Aragon river used to be very
dynamic, generating a landscape
dominated by free meanders,
which generated complex oxbow
lakes
ARAGON RIVER
Dredgins in Aragon river
Building defenses, making
constrictions and intense
dredging to prevent floods, as a
result of popular pressure,
coupled with the regulation of
the basin and channeling and
cut-offs, induced an accelerated
process of incision
Historical development of the conservation
of the Aragon river
1. XX century: time for conservation
Protection laws (1987-1989): 16 protected areas of riverside woodlands (4 in Aragon-Arga rivers)
Master plans for the use and management of natural reserves in Navarre (1989)
Master plan of river sanitation (1988): creation of an enviromental tax
Nature 2000 Network (2000): “Middle Stretches of Aragon" (ES2200030) and ‘Lower Stretches of
the Arga and Aragon rivers' (ES 2200035).
2. XXI´s century: Time for active river
restoration
Demonstration projects
LIFE GERVE (2006-09): 14 river
restoration projects . It was selected
as one of the 26 "Best" LIFE Nature
projects in 2007-2008.
Fluvial Territory recovery, river Aragón.
Caparroso (Navarra Government, 2009)
Historical development of the conservation
of the Aragon river
2007: Process of public participation in the Aragón river, management Plans WFD
2009-2010: Process of public participation , lower reaches Arga-Aragón river
LIFE Mink Territory (2010-2016)
15 restoration projects
• 7,357 m riverbank dikes removed,
• two ancient meanders reconnected,
• 13.11 ha of specific mink habitat created,
• 115.91 ha of protected habitats created
First Project LIFE Mink
Territory
Caparroso (2012-13)
Soto Contiendas: the final challenge (MarcillaNavarra), Aragon river
Execution date: March-December 2014
Project Objectives:
• Creation of high quality habitats that the European Mink uses
• Recovery of lateral geomorphological adjustments processes
Place: Marcilla (Navarra)
Ownership lands: Marcilla Council
• Restoration of the original shapes and return of sediments to fight the Rent lands: 130.232,57 € rent of 15,57 ha
former poplars plantations for 20 years
incision
•Give the Aragon river more space, with restoration of floodplains
Cost works: 797.242 euros €
Soto Contiendas: the final challenge (MarcillaNavarra), Aragon river
The Project
V excavation:
200.000 m3
V reintroduced:
9.485 m3
Surface excavation:
4,59 ha
Fill surface:
8,5 ha
Riprap removal:
985 ml
Dykes removal:
1.342 ml
Soto Contiendas: the final challenge (MarcillaNavarra), Aragon river
combinación de los modelos
1-D Morphodynamic model (Q: 164 m3/s) and 2-D hydraulic
simulation model (T: 2 to 500 years)
future
project
actual
widening
Gravel
incorporation
widening
Marcilla
Project, the day works end
Gravel evolution
Marcilla
Future, time later, balance achieved
The balance is achieved in 100 days
(flow equivalent). Gravel remains
in the widened section, some is
lost in the non-widened section
Source: Martin Vide, JP, Polytechnic University of Catalonia
Soto Contiendas: the final challenge (MarcillaNavarra), Aragon river
Removal of the riprap
Removal of the dikes
Return of
the
sediments
Soto Contiendas: the final challenge (MarcillaNavarra), Aragon river
Widening the river section
Soto Contiendas: the final challenge (MarcillaNavarra), Aragon river
Spreading gravel
Soto Contiendas: the final challenge (MarcillaNavarra), Aragon river
Reconstruction
of the wetland
Soto Contiendas: the final challenge (Marcilla- Navarra), Aragon river
Aragón River.
Sotocontiendas
Marcilla
February 2015
FUTURE
II Iberian River
Restoration
Congress
June 2015
THANK YOU
VERY MUCH
FOR YOUR
ATTENTION
Wetland projected, restored and
maintained by EL MONTICO youth
association (2013)
photo: ALNUS facebook