热带海洋学报 ›› 2021, Vol. 40 ›› Issue (1): 58-64.doi: 10.11978/2020013

• 海洋物理学 • 上一篇    下一篇

珠江口河网水体非光学活性水质参数高光谱反演

蔡建楠1,2(), 刘海龙3, 姜波3, 陈吟晖1,2, 李杰鸿1,2, 吴思晓2, 梁建霞2, 黄华4, 邢前国3()   

  1. 1.中山市环境监测站, 广东 中山 528403
    2.中山市生态环境局, 广东 中山 528403
    3.中国科学院烟台海岸带研究所, 中国科学院海岸带环境过程与生态修复重点实验室, 山东 烟台 264003
    4.广东环境保护工程职业学院, 广东省无人机环保应用工程技术研究中心, 广东 佛山 528216
  • 收稿日期:2020-02-03 修回日期:2020-04-18 出版日期:2021-01-10 发布日期:2020-04-24
  • 通讯作者: 邢前国
  • 作者简介:蔡建楠(1982—), 男, 广东省潮州市人, 硕士, 高级工程师, 主要从事环境监测遥感应用研究。email: jncai@foxmail.com
  • 基金资助:
    中国科学院科研装备研制项目(YJKYYQ20170048);国家自然科学基金项目(41676171);广东省科技创新战略专项(PDJH2020b1091)

Retrieval of non-optically active water quality parameters by hyperspectra for river network waters in the Pearl River estuary

CAI Jiannan1,2(), LIU Hailong3, JIANG Bo3, CHEN Yinhui1,2, LI Jiehong1,2, WU Sixiao2, LIANG Jianxia2, HUANG Hua4, XING Qianguo3()   

  1. 1. Zhongshan Environmental Monitoring Station, Zhongshan 528403, China
    2. Zhongshan Environmental Protection Agency, Zhongshan 528403, China
    3. Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
    4. Guangdong Polytechnic of Environmental Protection Engineering, Guangdong Engineering Technology Research Center for UAV Environmental Application, Foshan 528216, China
  • Received:2020-02-03 Revised:2020-04-18 Online:2021-01-10 Published:2020-04-24
  • Contact: XING Qianguo
  • Supported by:
    Instrument Developing Project of the Chinese Academy of Sciences(YJKYYQ20170048);National Natural Science Foundation of China(41676171);Science and Technology Innovation Strategy Project of Guangdong Province(PDJH2020b1091)

摘要:

以粤港澳大湾区中山市及其邻近水域河网水体为试验区, 同步采集现场光谱及水质数据, 研究受测水体的高光谱反射率特征, 并分析非光学活性参数中化学需氧量(CODCr)、总磷(TP)浓度与高光谱反射率的相关性。结果显示, 各河流水体光谱反射率主要受悬浮颗粒物和叶绿素a的影响; 在500~680nm波段范围内, 水体光谱反射率大小与CODCr、TP浓度呈负相关关系; 与单波段相比, 特定波段的反射率比值与CODCr、TP浓度值的相关性较高, 与CODCr、TP浓度值相关性最高的反射率比值波段组合分别为R675/R794R690/R815。选择上述波段组合建立的水质反演模型具有良好的估算精度, 模型估算平均相对误差分别为27.2%、32.1%, 表明高光谱技术在珠江口河网水体非光学活性参数CODCr、TP浓度反演上具有较大的应用潜景。

关键词: 珠江口河网, 非光学活性参数, 高光谱, 水质反演, 波段比值

Abstract:

Field spectra and water quality measurements were performed in Zhongshan City and its adjacent river network in the Guangdong-Hong Kong-Macao Greater Bay Area. The hyperspectral reflectance characteristic of the river network and its correlation with the concentration of two non-optical activity parameters Chemical Oxygen Demand (CODCr) and Total Phosphorus (TP) were analyzed. The results showed that the spectral reflectance of the river network was mainly affected by suspended particulate matter and chlorophyll-a. In the range of 500~680 nm, the spectral reflectance of the water had negative correlations with the concentrations of CODCr and TP. Compared with the single band, the reflectance ratio of the specific band had higher correlations with CODCr and TP concentrations. The reflectance ratio band combinations with the highest correlations with CODCr and TP concentrations are R675/R794 and R690/R815, respectively. The water quality retrieval models that depend on the band combination show good estimation accuracy, with 27.2% and 32.1% of the average relative errors, indicating that the hyperspectral technology has good potential application for non-optical activity parameters (CODCr and TP) retrieval in the river network of the Pearl River estuary.

Key words: river network of Pearl River estuary, non-optically active water quality parameter, hyperspectra, water quality retrieval, band ratio

中图分类号: 

  • P733.31