叶晗, 王胜强, 孙德勇, 李俊生, 朱元励, 张海龙, 张悦. 基于透明度的东中国海水质状况遥感评价[J]. 海洋环境科学, 2023, 42(4): 523-533. DOI: 10.12111/j.mes.2022-x-0244
引用本文: 叶晗, 王胜强, 孙德勇, 李俊生, 朱元励, 张海龙, 张悦. 基于透明度的东中国海水质状况遥感评价[J]. 海洋环境科学, 2023, 42(4): 523-533. DOI: 10.12111/j.mes.2022-x-0244
YE Han, WANG Shengqiang, SUN Deyong, LI Junsheng, ZHU Yuanli, ZHANG Hailong, ZHANG yue. Assessment of water quality in the Eastern China Seas based on water transparency satellite products[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2023, 42(4): 523-533. DOI: 10.12111/j.mes.2022-x-0244
Citation: YE Han, WANG Shengqiang, SUN Deyong, LI Junsheng, ZHU Yuanli, ZHANG Hailong, ZHANG yue. Assessment of water quality in the Eastern China Seas based on water transparency satellite products[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2023, 42(4): 523-533. DOI: 10.12111/j.mes.2022-x-0244

基于透明度的东中国海水质状况遥感评价

Assessment of water quality in the Eastern China Seas based on water transparency satellite products

  • 摘要: 水体水质状况对海洋生态环境保护和可持续发展具有重要意义。本文针对东中国海海域,从水体透明度(Zsd)视角,基于长时序MODIS光学卫星遥感资料,构建了一种评价水体状况的新方法。该方法利用透明度及其变化趋势将水质状况进行分类,将水体分为高值且上升趋势(high and increasing, HI)、高值且无趋势(high and no change trend, HN)、高值且下降趋势(high and decreasing, HD)、低值且上升趋势(low and increasing, LI)、低值且无趋势(low and no change trend, LN)、低值且下降趋势(low and decreasing, LD)6种类型,以此对东中国海的水质状况及其影响因素进行分析。结果显示:近20年来东中国海近岸水体大部分区域呈现LN类型,但江苏近岸(连云港附近)水体呈现LD类型;外海海域大部分水体呈现HN类型,但南黄海南部和东海陆架区的部分区域水体呈现HD类型。外海和近岸海域的水体状况分别主要由悬浮颗粒物中的浮游植物和悬浮泥沙主导,但在浙江—福建近岸,其水体状况可能由两者共同主导。

     

    Abstract: Water quality condition is of great significance for protection of marine ecological environment and sustainable development. In this study, from the perspective of water transparency (Zsd), we proposed a new method for evaluating water conditions based on long time series MODIS optical satellite remote sensing data in the Eastern China Seas. The method classifies water quality using transparency and trends, and the water can be divided into High and Increasing (HI) type, High and No change trend (HN) type, High and Decreasing (HD) type, Low and Increasing (LI) type, Low and No change trend (LN) and Low and Decreasing (LD) type, were used to analyze the water quality in the Eastern China Seas and its influencing factors. The results showed that most of the coastal waters of the Eastern China Seas are LN type, while the waters in Jiangsu Coast (near Lianyungang) are LD type in the past 20 years. The offshore waters mostly beyond to HN type, while some areas of the South of South Yellow Sea and the East China Sea shelf generally showed HD type waters. Phytoplankton and suspended sediment are the dominant influence factors of the water condition in the offshore and coastal waters, respectively; and in the Zhejiang-Fujian coast, the water condition is probably modulated by the both of phytoplankton and suspended sediment.

     

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