Presentation on theme: "Free space for Rivers – Mobility space for the active rivers example of the Loire and the Allier Dr. Stéphanie Hudin –Centre de Ressources du patrimoine."— Presentation transcript:
Free space for Rivers – Mobility space for the active rivers example of the Loire and the Allier Dr. Stéphanie Hudin –Centre de Ressources du patrimoine naturel et des zones humides du bassin de la Loire Dr. Stéphanie Hudin –Centre de Ressources du patrimoine naturel et des zones humides du bassin de la Loire Fédération des Conservatoires despaces naturels, Orléans, France RESTORE Workshop – Policy to deliver landuse planning, and river restoration for River Basin Management November 2011, PARIS
Natural Areas Conservancies Federation federating natural areas management associations Non-profit associations – involved but not activists ; 21 regional and 8 departmental Conservancies 558 employees, 1800 volunteers et 8500 members 2054 managed sites ( Ha) and involved in the management of almost Ha (Natura 2000 Docob, agri-environmental agreements, Sensitive Natural Areas, military fields…)
Free Space for Rivers – Development of the concept 1980, Tours, « Conference on the ecology and the management of the Loire » 1981 Dr. Guinard publishes the first scientific article on the caracteristics and originality of the Allier River (Guinard, 1981) PIREN Rhône ; first apparition of the Hydrosystem concept.. National Days for the Water (1991) « the rivers free space, expression of the rivers dynamics, minus the existing installations, has to be recognized and identified also through the law. » As a result of the long-lasting effects of the gravel exploitation, it is « best to tolerate the riverbank erosion in order to restore the past state ».
A management concept that was first of all an evaluated reserved space for the rivers to: - maintain the capacity to adapt to the surfaces (development of turns or shortenings) ; - garantee the production of sediments (through the riverbanks erosion) ; - protect the groundwater qualities (by protecting against the riverbeds incision) ; - protect the particularities and even the originalities of the ecological dynamics. Definition and determination of the free space for rivers
Different French projects which have taken part in the refining of the concept : - the CEPA, LPO and CSA project on the Allier (1990-) - the Mosel and Maas project coordinated by the Rhine-Maas water agency and the Conservatoire des Sites lorrains (1990-) - the Rhône project coordinated by the Rhône Mediterrannée Corse water agency (1990-) - the Doubs and Loue project coordinated by the Franche-Comté DIREN - the Adour project by the Adour Institute (2000-) International programs through which there were exchanges on the concept : - « Rivers need room» « Flüsse brauchen Platz » project in the Alps - a Tchech-Polisch Oder river project coordinated by WWF This approach has been introduced to the French basin water management and planning. (2006 u. 2009) First applications and Developments
Gesetzlicher Ausführung und Bewahrung 24th January 2001 decree on the gravel exploitation (Erosion/Riverbanks destruction/Riverbed capture - risk possibility) - 1st art: Gravelpits are banned from the free mobility space of the watercourses. - 2nd art: The free mobility space of the watercourses is defined in the geomorphogeological valley in which the river its bed can have. The law of the 30st July 2003 on the technological and natural risk prevention (combined approach) - Art. Number 48 opens up the possibility to the introduction of a servitude to preserve the mobility space or to restore it.
Guide de détermination de lespace de liberté des cours deau. 1998, SDAGE RMC (et Malavoi and al.) - Methodological guide to define the mobility space… NO precise delimitation. Application Reference document
The Loire basin km² 1/5 France 1013 km 10 millions inhabitants
Perturbations and Impacts
Dams Water volumes modifications Riverbanks riprap Lateral erosion capacity loss Gravel pit Alluvial potential reduced Riverbed incision Loss of natural habitats (fluvial annexes, alluvial forests…) Effects on the hydraulic structures Effects on the quantity & quality of the water resources Perturbations and Impacts
Main dynamic watercourse parts in the Loire basin
Water Framework (DCE) More than 60 % of the watercourses are morphologically damaged
First Phase Life program : 12 sites, 8 nature protection organizations, 8 Millions ; - Applications of pratical methods for the Loire ecosystem management and protection ; - Financing of studies on the hydrology and morphology of the Loire and the Allier; - At the start based on the mobility space, the concept of the free space for rivers was developed through this program. 30 km riverbanks bought = 1140 ha mobility space « secured » the EPTEAU Study in defined a first Theory of a « free » space for rivers and its potential buying costs Positive balance between participants collaborative work and the application of an innovative method. The « Loire Nature » Plan Second Phase Objective : restoration of natural areas - 15 Millions - 15 Nature protection NGOs and about 100 Project sites Land buying continuation and awareness campaign ; Legal studies on the erosion problemns and on the mobility space servitude; (art. 48 of the 30st. July 2003).
Example in the Loire basin : Project in the Auvergne
Illustrations sites Joze-Maringues Méandres des Granges Méandres des Germains Varennes-Moulins Bec de Dore Pré Redan
Suivi de lérosion Some very dynamic sections : 14 meters/year of bank erosion
Sites on the Allier river
Diachro Chatel Allier evolution in Chatel-le- Neuvre
Occupation du sol Optimal mobility space in the Varennes-Moulins area : River section of 26 km 10 collectivities 500 to 2 500m wide Surfaces of ha incl ha of DPF (52 %) ha private 15 % forests 6 % grassland 39 % cultivated
24 territories, ha total surfaces - 12 Priority 1 ( 564 ha) - 12 Priority 2 ( 493 ha) Key area - erosion capacities (actual or short term) - ecological diversity - restoration and use possibilities - anthropic pressures
Over 26 km River length, of which 48% surfaces lie in the mobility space f the public domain ha bought since % Priority 1 32 % Priority % in the mobility space - average cost = /ha (100 m enrockment for protection of 1 ha = 15 à ) - these 170 ha are to 10 % in private property, of which 5,6 ha eroded surfaces between 2000 and 2005 in private property, 2,3 ha so 41 % were bought by the Loire Nature Project Project Facts :
Land Buying : Limits and Problems Buying all the the mobility space land is not possible and not to be wished for : It is necessary to define the « priority surfaces » Limited Funds Speculation risks : offer/demand Use of public funds for private interest not willing proprietors: behinderte Verkäufe, Herstellung von Einschliessungen Kleinstparzellierung : Häufung von Besitzern und Verteuerung des Notarkosten.
Agricultural management which is : - compatible with Erosion and Inundation risks - acceptable for water resources and biological diversity A long term contracting with the users/inhabitants Unmanaged forests
Loire Nature and more : an innovative action of the Allier Conservancy Objective : to develop the inhabitants to the perservation of a free space for rivers Through the natural particularities Conservancys speciality, but to little interested (), Through the historical and cultural particularities Existence of the rich historical and cultural inheritance around the river, esp. when linked to the navigation To share the knowledge and the expression of the Allier meandering To raise awareness of the inhabitant of the rivers dynamic importance Ease the exchange Objective Project True interest of the inhabitants and public bodies More than 50 partners Exchange made easy through a subject different than ecology.
Principal projects in the water, spaces, species platform 9 Projects supported by the FEDER 4 dynamic sectors on the Allier And 3 on the Loire CRE ZH of the val d'Allier, CRE ZH of the val de Loire Auvergne région, CG 03, CG 63, CG 43, CEPA, CSA, LPO Auvergne Sensibilisation / Animation Exhibit « Sur les traces de lAllier » (CSA, 2008) Technical séminars in 2008, 2009, 2011 In the research, datas, informations platform Research projects on géomorphology Pedagogic tool on River dynamics (LPO Auvergne, 2009)