Example 5 «Breizh-bocage» program

Transcription

1 Fighting tools against water pollution (PART II) Examples of actions implemented in Brittany Bertrand Guizard DRAAF de Bretagne 28/01/2015 DRAAF Bretagne 1 Example 5 «Breizh-bocage» program The bocage as vector of reconquest of water quality 28/01/2015 DRAAF Bretagne 2 1

2 An endangered bocage (1) Constat alarmant de dépérissement du bocage Érosion de 1,1 % par an constatée entre les deux enquêtes successives de 1996 ( km) et 2008 ( km) X1000 km Bretagne /01/2015 DRAAF Bretagne 3 An endangered bocage (1) A still important hedge linear, but aging, with many senescent trees 28/01/2015 DRAAF Bretagne 4 2

3 A regional program for the restauration of the breton bocage Breizh-bocage (1) recognition of the multifunctionality of the bocage Limitation of surface transfers of polluting substances : phosphorus, organic matters, pesticides; slowdown of floods Stops the soils erosion; biological corridors, physical connection between «biological reservoirs» Places of biodiversity Windbreakers and livestock shelters Production of energy and lumber beautiful countryside and natural scenery 28/01/2015 DRAAF Bretagne 5 Restauration of the bocage as a tool of protection of the soils and of waters 28/01/2015 DRAAF Bretagne 6 3

4 A regional program for the restauration of the breton bocage Breizh-bocage (2) M FEADER, French State, Water Agency, Regional and Departmental concils Holders often similar to those of the GP5 (watersheds reprentatives) or groupings of communes About 55 facilitators 28/01/2015 DRAAF Bretagne 7 A three phased program Source DRAAF Saint Marc sur Couesnon Phase 1 : territorial study Phase 2 : Diagnostic-Action Phase 3 : works 28/01/2015 DRAAF Bretagne 8 4

5 Phase 2 : Diagnostic-Action Analysis of the situation and evaluation of the bocage evolution dynamic; Program of improvement Source : communauté de communes du pays de Bécherel réalisation Cyril Mainguy et Thierry Guéhenneuc 28/01/2015 DRAAF Bretagne 9 Phase 3 : works New hedges with or without banks Ancient Hedges restauration Travaux à Langouet Source DRAAF Restauration de talus à Irodouer Source DRAAF 28/01/2015 DRAAF Bretagne 10 5

6 Restauration of the bocage as a tool of protection of the soils and of waters Embankments perpendicular to the slope Création de haie-talus dans le cadre de Breizh-bocage Source Cœur-Émeraude 28/01/2015 DRAAF Bretagne 11 Restauration of the bocage as a tool of protection of the soils and of waters Planted embankments perpendicular to the slope Création de haie-talus dans le cadre de Breizh-bocage Source DRAAF-Romillé 28/01/2015 DRAAF Bretagne 12 6

7 Restauration of the bocage as a tool of protection of the soils and of waters Planted embankments perpendicular to the slope Progressive evolution of the lanscape Visible restauration of the bocage network 28/01/2015 DRAAF Bretagne 13 Restauration of the bocage as a tool of protection of the soils and of waters Coupling of hedgerows (low-laying grouds belts) with grass strips along the waterway Réalisation Breizh-bocage à Langouet Source DRAAF 28/01/2015 DRAAF Bretagne 14 7

8 Result of Breizh-bocage (march 2014) an important lineary of new hedgerows km at the end of the program 28/01/2015 DRAAF Bretagne 15 Positive developments 28/01/2015 DRAAF Bretagne 16 8

9 Evolution of the nitrates concentrations Surface waters Evolution du nombre de stations par classe de qualité (Q90) 100% 90% 80% 70% 60% 50% 40% 30% > 50 mg/l > 25 mg/l et <= 50 mg/l > 10 mg/l et <= 25 mg/l > 2 mg/l et <= 10 mg/l <= 2 mg/l 20% 10% 0% /01/2015 DRAAF Bretagne 17 Evolution of the nitrates concentrations Distributed waters The community procedure C505/03 (about- quality of drinking waters) was closed in april /01/2015 DRAAF Bretagne 18 9

10 Evolution of the phosphorus concentrations Surface waters 28/01/2015 DRAAF Bretagne 19 Evolution of the nitrates concentrations Surface waters 28/01/2015 DRAAF Bretagne 20 10

11 Thank you for your attention! 28/01/2015 DRAAF Bretagne 21 11