IOCAS-IR
典型河口高浑浊水体光学特性及浊度遥感反演研究
罗亚飞
第一作者单位中国科学院海洋研究所
学位类型博士
导师黄海军
2018-05-15
学位授予单位中国科学院大学
学位授予地点中国科学院海洋研究所
学位名称理学博士
学位专业海洋地质
关键词高浑浊水体 悬浮颗粒物 矿物成分 光学性质 高分辨率卫星
摘要

本文针对高浑浊水体,即悬浮颗粒物浓度(SPM)在10~1000+ g·m-3或浊度在11~1110+ NTU的水体,通过实验和理论分析研究了其光学特性并进行了浊度遥感反演研究。主要研究内容如下:

1)进行了水槽实验,研究了典型河口水体吸收系数对悬浮颗粒矿物成分结构的响应特征。水槽实验解析了悬浮颗粒矿物成分差异对水体吸收系数的影响。研究对黄河口、长江口和珠江口水体不同浓度的悬浮矿物颗粒光谱吸收系数进行测量与分析,结果表明二类水体光谱吸收系数与悬浮颗粒矿物组成相关。

2)基于实测数据和Landsat 8/OLI卫星数据,研究了高浑浊水体的反射率饱和现象,并利用饱和值反演了颗粒物浓度比固有光学参数。在可见光波段,当悬浮颗粒物浓度超过100 g·m-3时,在蓝、绿和红光谱区域中,饱和现象比较明显;为了定量描述高浑浊水体反射率饱和现象,利用Nechad模型模拟了所观察到的饱和现象,并计算了饱和值;基于Hydrolight辐射传输模拟结果,对几种半分析生物光学模型的适用性进行了评估;最后利用合适的半分析生物光学模型及得到的饱和值,反演了颗粒物比后向散射系数和比吸收系数的比值(bbp*/ap*)。

3运用了米级高分辨率卫星Pléiades对高浑浊河口水体进行了遥感反演研究。评估了2 m高分辨率的Pléiades卫星影像在高浑浊水体(吉伦特河口)浊度反演方面的表现。结果表明2 m空间分辨率的Pléiades影像涵盖更多细节特征,很适合微细尺度特征研究,例如Pauillac自动观测站的浊度监测。同时也很适合像最大浑浊带地区(试验区1)这样具有强空间变化特征的环境监测。但是在浊度变化小的河口地区(试验区2),2 m Pléiades影像优势不明显;此外,利用Pléiades卫星高分辨率优势,探索了其在高浑浊水体遥感反演方面的新应用。

其他摘要

The optical properties of highly turbid waters (ie., Suspended Particulate Matter (SPM) in 10~1000+ g·m-3 or turbidity in 11~1110+ NTU) and turbidity retrieval in such turbid waters were studied. The main researches of the thesis are as follows:

1) A tank experiment was designed to discuss the impact of mineral composition on optical properties in coastal waters. The results show that when in the same concentration, the absorption coefficient of clay mineral varies. It suggests that the absorption coefficient of clay mineral is not only connected to the SPM concentration, but also mineral composition.

2) Evidence of water reflectance saturation in extremely turbid media is highlighted based on both field measurements and satellite data corrected for atmospheric effects. This saturation is obvious in visible spectral bands, i.e., in the blue, green and even red spectral regions when the concentration of suspended particulate matter (SPM) exceeds 100 g·m-3. The Nechad-type relationship is selected to model the progressive saturation of Rrs in visible spectral bands and determine an objective criterion for saturation. The validity of several bio-optical semi-analytical models is assessed in the case of highly turbid waters, based on comparisons with outputs of the Hydrolight radiative transfer model. The most suitable models allow to reproduce the observed saturation and, by inversion, to retrieve information on the SPM mass-specific inherent optical properties.

3) Meter scale satellite data was applied to highly turbid waters to retrieve turbidity and useful information. We made first evaluation of the performance of Pléiades image in estuary and coastal water by comparing to 20 m SPOT-like and 250 m MODIS-like resolution images. The results show that Pléiades has a 2 m spatial resolution and covers more detail features, rendering it more suitable for application in the studies of fine-scale features such as Pauillac autonomous station turbidity monitoring and strong spatial variation environments such as MTZ (test site 1) detecting. However, Pléiades doesn’t outperform SPOT-like and MODIS-like images in the river mouth (test site 2). Then, Pléiades imagery with very high resolution shows its potential in new applications.

学科门类理学::海洋科学
语种中文
文献类型学位论文
条目标识符http://ir.qdio.ac.cn/handle/337002/154498
专题中国科学院海洋研究所
推荐引用方式
GB/T 7714
罗亚飞. 典型河口高浑浊水体光学特性及浊度遥感反演研究[D]. 中国科学院海洋研究所. 中国科学院大学,2018.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
典型河口高浑浊水体光学特性及浊度遥感反演(9334KB)学位论文 延迟开放CC BY-NC-SA2019-6-30后可获取请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[罗亚飞]的文章
百度学术
百度学术中相似的文章
[罗亚飞]的文章
必应学术
必应学术中相似的文章
[罗亚飞]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。