Thirty-Four-Year Record (1987–2021) of the Spatiotemporal Dynamics of Algal Blooms in Lake Dianchi from Multi-Source Remote Sensing Insights
نویسندگان
چکیده
Lake Dianchi is one of the most eutrophic lakes in China. The decline water quality and occurrence massive algal blooms pose a significant threat to health environmental safety ecosystem, making key concern for bloom management Obtaining spatiotemporal dynamics longest time possible crucial future prediction. However, it difficult acquire long-term record from single sensor order cover more extended period eutrophication lake due limitation spatial temporal resolution sensors. In this study, Landsat Moderate-Resolution Imaging Spectroradiometer (MODIS) images were combined with Floating Algae Index (FAI) reconstruct unified series areas analyze recent decades. Regarding interannual variation, area showed an increasing trend 1987 2021, larger 1991–1992, 2000–2003, 2012–2013, 2020–2021. terms seasonal characteristics, was significantly prominent rainy season compared dry during year. distribution frequency pattern higher frequencies north lower south. From 2000 initial duration delaying then advancing decreasing increasing, respectively. We analyzed importance records found that percentage essential factor reconstructing based on different addition, relationship between factors analyzed. results show wind speed air temperature main meteorological controlling variation Dianchi. Water such as nutrients have less influence because growth demand has been met. Environmental measures taken by local governments led improvements lake’s trophic state, continued strengthening pollution control expected curb This study provides Dianchi, which reference information comprehensive understanding development process its sustainable development.
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ژورنال
عنوان ژورنال: Remote Sensing
سال: 2022
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs14164000