Identification des modes de gestion de la plante envahissante Spartina alterniflora et surveillance dynamique basée sur les images temporelles Sentinel-2 et Landsat 8

  • role: First author第一作者
  • Affiliation:

    State Key Laboratory Cultivation Base of Urban Environment Process and Simulation, Beijing 100048, China

    Beijing Laboratory of Water Resources Security, Beijing 100048, China

    College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China

  • Email:2230902139@cnu.edu.cn
  • Introduction:戚炜淳,研究方向为湿地变化检测,生态水文遥感应用。E-mail: 2230902139@cnu.edu.cn
QI Weichun123,  
  • role: Corresponding author通信作者
  • Affiliation:

    State Key Laboratory Cultivation Base of Urban Environment Process and Simulation, Beijing 100048, China

    Beijing Laboratory of Water Resources Security, Beijing 100048, China

    College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China

  • Email:yke@cnu.edu.cn
  • Introduction:柯樱海,研究方向为多源遥感数据融合、人工智能及数据挖掘方法,生态水文遥感应用。E-mail: yke@cnu.edu.cn
KE Yinghai123*,  
  • Affiliation:

    State Key Laboratory Cultivation Base of Urban Environment Process and Simulation, Beijing 100048, China

    Beijing Laboratory of Water Resources Security, Beijing 100048, China

    College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China

LI Jinyuan123,  
  • Affiliation:

    State Key Laboratory Cultivation Base of Urban Environment Process and Simulation, Beijing 100048, China

    Beijing Laboratory of Water Resources Security, Beijing 100048, China

    College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China

MIN Yukui123,  
  • Affiliation:

    State Key Laboratory Cultivation Base of Urban Environment Process and Simulation, Beijing 100048, China

    Beijing Laboratory of Water Resources Security, Beijing 100048, China

    College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China

ZHUO Zhaojun123,  
  • Affiliation:

    State Key Laboratory Cultivation Base of Urban Environment Process and Simulation, Beijing 100048, China

    Beijing Laboratory of Water Resources Security, Beijing 100048, China

    College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China

WU Xin123,  
  • Affiliation:

    College of Harbour and Coastal Engineering, Jimei University, Xiamen 361021, China

LI Peng4

résumé

La gestion de la plante envahissante Spartina alterniflora est un élément important de la protection et de la restauration écologique des zones humides côtières. Actuellement, plusieurs provinces côtières mettent en œuvre des projets de gestion de Spartina alterniflora, par des méthodes de suppression physique et chimique; la première est rapide mais sujette à récidive, la seconde est peu coûteuse mais présente des impacts environnementaux potentiels négatifs. La surveillance en temps opportun de la dynamique de suppression de Spartina alterniflora et l'identification des méthodes de suppression sont cruciales pour l'évaluation de l'efficacité des projets et des impacts environnementaux. Cette étude porte sur la zone de distribution de Spartina alterniflora dans les zones humides côtières de Zhejiang et Shanghai, et propose une méthode d'identification de l'état de suppression et du mode de gestion (non supprimé/ suppression physique/ suppression chimique) basée sur des images satellitaires optiques temporelles Sentinel-2 et Landsat 8, ainsi que l'extraction de la date de suppression physique. D'abord, les images Sentinel-2 MSI et Landsat 8 OLI sont fusionnées pour constituer un ensemble de données d'indices spectrales temporelles, suivi par l'utilisation d'une fenêtre glissante et d'une méthode discriminante basée sur des règles pour identifier la période d'impact de la gestion et déterminer l'état de suppression; ensuite, la méthode de la forêt aléatoire est utilisée pour classifier le mode de gestion, aboutissant à trois catégories : non supprimé, suppression physique et suppression chimique, avec identification supplémentaire de la date de suppression physique. Les résultats montrent une haute précision de classification de l'état et du mode de suppression, avec une précision globale de 98,8% et un coefficient Kappa de 0,979; l'erreur absolue moyenne de la détection de la date de suppression physique est de 3,91 jours avec une précision de 93,67%. En 2023, les taux de suppression de Spartina alterniflora à Shanghai et dans le Zhejiang étaient respectivement de 4,2% et 62,7%. La méthode proposée pour l'identification des modes de gestion et la surveillance dynamique offre une référence importante pour la prise de décision dans la gestion des zones humides côtières.

mots-clés

Télédétection optique; invasion des espèces; analyse de séries temporelles; restauration des zones humides; dynamique de la végétation

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