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Ddep Confortement Digue Rive Droite Var Smiage 201910 2019 TRAVAUX DE CONFORTEMENT COMPLEMENTAIRE DU SYSTEME D’ENDIGUEMENT DE LA RIVE DROITE DU VAR, SECTEURS 1 - 2 - 4 - 9 COMMUNE DE CARROS (06 510) DOSSIER DE DEMANDE DE DEROGATION POUR LA CAPTURE OU L’ENLEVEMENT, LA DESTRUCTION ET LA PERTURBATION INTENTIONNELLE DE SPECIMENS D’ESPECES ANIMALES ET VEGETALES PROTEGEES AGENCE PACA Corse Site Agroparc Rue Lawrence Durrell BP 31 285 84 911 AVIGNON Cedex 9 www.naturalia-environnement.fr SMIAGE - Travaux de confortement de la digue de Carros en rive droite. Dossier de demande de dérogation à la destruction / déplacement d’espèces animales et végétales protégées 2019 SMIAGE - Travaux de confortement de la digue de Carros en rive droite. Dossier de demande de dérogation à la destruction / déplacement d’espèces animales et végétales protégées 2019 TRAVAUX DE CONFORTEMENT COMPLEMENTAIRE DU SYSTEME D’ENDIGUEMENT DE LA RIVE DROITE DU VAR, SECTEURS 1 - 2 - 4 - 9 COMMUNE DE CARROS (06) DOSSIER DE DEMANDE DE DEROGATION POUR LA CAPTURE OU L’ENLEVEMENT, LA DESTRUCTION ET LA PERTURBATION INTENTIONNELLE DE SPECIMENS D’ESPECES ANIMALES ET VEGETALES PROTEGEES Rapport remis-le : 20 septembre 2019 Pétitionnaire : SMIAGE Maralpin Guy DURAND Coordination : Chargés d’études milieu terrestre : Thomas CROZE – Botaniste Sylvain FADDA – Entomologiste Cyrille SABRAN - Ornithologue Mattias PEREZ – Herpétologue Lénaïc ROUSSEL – Mammalogiste Lucas VINCENTI – Ecologue généraliste Rédaction Tommy Faure-Brac – Ecologue Caroline AMBROSINI - Cartographe Cartographie Suivi des modifications : 28.02.2019 1e diffusion – Etat initial T. Faure-Brac et G. Durand 17.06.2019 2e diffusion – Intégration mesure ER T. Faure-Brac et G. Durand 07.08.2019 3e diffusion – Intégration mesure compensatoire T. Faure-Brac et G. Durand e 20.09.2019 4 diffusion – Révision suite à l’envoi du plan de T. Faure-Brac et G. Durand masse SMIAGE - Travaux de confortement de la digue de Carros en rive droite. Dossier de demande de dérogation à la destruction / déplacement d’espèces animales et végétales protégées 2019 SOMMAIRE 1. Résumé non technique .................................................................................................................. 1 2. Introduction .................................................................................................................................... 4 3. Présentation du projet ................................................................................................................... 5 3.1. Le demandeur ...................................................................................................................................... 5 3.2. Contexte réglementaire du projet ....................................................................................................... 5 3.3. Localisation générale du projet .......................................................................................................... 6 3.4. Justification du projet .......................................................................................................................... 7 3.4.1 Motifs du projet .................................................................................................................................. 7 3.4.2 Présentation des solutions alternatives ............................................................................................. 7 3.5. Présentation générale .......................................................................................................................... 7 3.5.1 Historique des travaux ....................................................................................................................... 8 3.5.2 Désordres identifiés et voies d’accès............................................................................................... 12 3.5.3 Nature des travaux à réaliser ........................................................................................................... 13 3.5.4 Phasage détaillé des travaux (cf. annexe 6) .................................................................................... 14 3.5.5 accès au chantier ............................................................................................................................. 15 3.5.6 Sectorisation du projet et accès chantier ......................................................................................... 16 3.5.7 Implantation du projet ...................................................................................................................... 17 3.5.8 Profil en travers du chantier ............................................................................................................. 18 3.5.9 Planning ........................................................................................................................................... 19 3.5.10 Moyens ........................................................................................................................................ 19 3.6. Autres procédures environnementales ........................................................................................... 19 4. Etat initial écologique du projet .................................................................................................. 20 4.1. Définition de l’aire d’étude / zone prospectée ................................................................................. 20 4.2. Recueil bibliographique / consultation de personnes ressources ................................................ 21 4.3. Stratégie / méthodologies d’inventaires .......................................................................................... 22 4.3.1 Choix des groupes taxonomiques étudiés ....................................................................................... 22 4.3.2 Calendrier des prospections / effort d’échantillonnage / éléments méthodologiques ...................... 22 4.3.3 Critères d’évaluation ........................................................................................................................ 24 4.4. Présentation du contexte écologique .............................................................................................. 24 4.4.1 Fonctionnalités et continuités écologiques ...................................................................................... 24 4.4.2 Périmètres d’intérêt écologique locaux ............................................................................................ 29 4.5. Synthèse des enjeux relatifs au milieu naturel ............................................................................... 33 4.5.1 Les habitats naturels ........................................................................................................................ 33 4.5.2 Évaluation des enjeux floristiques sur l’aire d’étude ........................................................................ 36 4.5.3 Evaluation des enjeux faunistiques sur l’aire d’étude ...................................................................... 39 5. Analyse des impacts bruts du projet ......................................................................................... 46 SMIAGE - Travaux de confortement de la digue de Carros en rive droite. Dossier de demande de dérogation à la destruction / déplacement d’espèces animales et végétales protégées 2019 5.1. Typologie des impacts ...................................................................................................................... 46 5.2. Représentation cartographique des enjeux vis à-vis du projet ..................................................... 48 5.3. Bilan des impacts bruts avant mesures d’insertion ....................................................................... 51 5.3.1 Impacts bruts sur les habitats naturels et la flore ............................................................................. 51 5.3.2 Impacts bruts sur la faune ............................................................................................................... 52 6. Mesures d’atténuation ................................................................................................................. 54 6.1. Typologie des mesures ..................................................................................................................... 54 6.2. Propositions de mesures .................................................................................................................. 56 6.2.1 Les mesures d’évitement ................................................................................................................. 56 6.2.2 Les mesures de réduction ............................................................................................................... 57 7. Analyse des impacts résiduels ................................................................................................... 72 8. Les impacts cumulés ................................................................................................................... 76 8.1. Définition et méthode ........................................................................................................................ 76 8.2. Avis de l’autorité environnementale disponibles ............................................................................ 76 9. Objet de la saisine des commissions faune et flore du cnpn .................................................. 78 9.1. Présentation des espèces ................................................................................................................
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