基于HICO模拟数据的杭州湾水体悬浮物浓度遥感反演

doi:10.6046/gtzyyg.2018.04.25

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摘要

以杭州湾及其邻近海域为研究区,利用现场实测光谱模拟了近海高光谱成像仪(hyperspectral imager for the coastal ocean,HICO)波段,并在光谱特征分析的基础上确定特征波段,通过比较单波段、波段比值和反射峰面积等算法,建立了该海域悬浮物的遥感反演模型,并采用均方根误差和相对误差进行精度评价。研究结果表明,利用724.84 nm与461.36 nm波段光谱反射率比值建立的模型精度较高; 模型的决定系数为0.925 2,反演得到的悬浮物浓度与实测悬浮物浓度之间的均方根误差为14.09 mg/L,平均相对误差为5.2%。本研究对利用HICO模拟数据反演近海岸水体悬浮物具有一定的参考意义。

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	禹定峰
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	盖志刚
	刘恩晓

关键词 ： HICO, 悬浮物, 遥感, 杭州湾

Abstract：

In this study, field data such as the concentration of total suspended matter (TSM) in Hangzhou Bay and its adjacent areas in Hangzhou’s coastal waters were observed, meanwhile, hyperspectral remote snesing data were measured with SVC GER1500 spectrometer during four cruises carried out on 20th, 22nd, 23rd and 24th July 2010. The coastal water-leaving refectance of HICO was simulated from in situ hyperspectral remote sensing spectra. The normalized peak area of remote sensing reflectance in the near-infrared region was applied to retrieving TSM after the spectra of simulated HICO were analyzed, as well as the application of single band model and band ratio model. The result indicated that the band ratio algorithm of Rrs(724.84)/Rrs(461.36) of HICO could be used to retrieve TSM in Hangzhou Bay. This study is helpful to retrieving TSM in coastal waters using HICO.

Key words： HICO total suspended matter remote sensing Hangzhou Bay

收稿日期: 2017-04-06 出版日期: 2018-12-07

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基金资助:国家海洋公益性项目“海洋高光谱仪和机载激光测量系统产品化关键技术研究及应用示范”(201505031);山东省重点研发计划项目“国家海洋监测设备工程技术研究中心”(2016GGH4501);山东省自然科学基金项目“基于压缩感知的GNSS接收机捕获技术研究”(ZR2015YL020);山东省科学院青年基金项目“便携式水质高光谱仪关键技术研究”(2015QN028);青岛创业创新领军人才计划项目“海洋激光光电观测系统产业化关键技术研究”共同资助(13-CX-23)

通讯作者: 马万栋

作者简介: 禹定峰(1986-),男,副研究员,博士,主要从事水色遥感研究。Email: dfyucsas@163.com。

引用本文:

禹定峰, 周燕, 马万栋, 盖志刚, 刘恩晓. 基于HICO模拟数据的杭州湾水体悬浮物浓度遥感反演[J]. 国土资源遥感, 2018, 30(4): 171-175.
Dingfeng YU, Yan ZHOU, Wandong MA, Zhigang GAI, Enxiao LIU. Retrieval of total suspended matter concentration in Hangzhou Bay based on simulated HICO from in situ hyperspectral data. Remote Sensing for Land & Resources, 2018, 30(4): 171-175.

链接本文:

https://www.gtzyyg.com/CN/10.6046/gtzyyg.2018.04.25 或 https://www.gtzyyg.com/CN/Y2018/V30/I4/171

Fig.1 杭州湾采样站点位置

Fig.2 19个站点的实测悬浮物浓度

Tab.1 HICO主要参数

Fig.3 19个站点的模拟HICO光谱反射率曲线

Fig.4 模拟HICO光谱反射率与悬浮物浓度之间的相关系数

Fig.5 不同光谱反射率与悬浮物浓度之间的关系

Fig.6 波段比值与悬浮物浓度之间的关系

Fig.7 实测悬浮物浓度与反演值对比

Fig.8 水体悬浮物在近红外波段的反射峰面积示意图

Fig.9 反射峰面积与悬浮物浓度的相关关系

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