Identifying multiple stressors in regional agro-ecosystems based on sentinel-2 spectral indices time series

Meiling Liu*, Xiangnan Liu, Yuanyuan Meng, Andrew K. Skidmore, Tiejun Wang

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

    Abstract

    The purpose of this study focused on integrating spectral indices with spatio-temporal characteristics to identify multi-stressor in crops. The experimental areas are located in Dongting Lake (DL), Hunan Province, China. Multitemporal Sentinel-2 (S2) images in 2016, 2017 were collected. Red-edge chlorophyll index (CIred-edge), rededge position (REP), normalized difference red-edge 2 (NDRE2) were calculated. The coefficients of spatiotemporal variation (CSTV) from spectral indices allowed us to discriminate crops exposed to pollution from heavy metal as well as environmental stressors. The results indicated that three indices were good indicators for identifying different environmental stressor in agriculture ecosystem. Crops under heavy metal stress remained stable with lower CSTV values, while crop `hot spots' (with greater CSTV values) were affected by abrupt stressors (i.e., pest and disease, drought) at some growth stage. It concluded that spectral indices and spatio-temporal characteristics show promise for monitoring crops with various stressors.

    Original languageEnglish
    Title of host publication2018 IEEE International Geoscience and Remote Sensing Symposium
    Subtitle of host publicationproceedings
    Place of PublicationPiscataway, New Jersey
    PublisherInstitute of Electrical and Electronics Engineers (IEEE)
    Pages9335-9338
    Number of pages4
    ISBN (Electronic)9781538671504, 9781538671498
    ISBN (Print)9781538671511
    DOIs
    Publication statusPublished - 2018
    Event38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Valencia, Spain
    Duration: 22 Jul 201827 Jul 2018

    Conference

    Conference38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018
    CountrySpain
    CityValencia
    Period22/07/1827/07/18

    Keywords

    • Abrupt
    • Heavy metal pollution
    • Sentinel-2 images
    • Spatio-temporal characteristics Stable stress

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