Remote sensing estimation of the concentration and sources of coloured dissolved organic matter based on MODIS: A case study of Erhai lake

doi:10.1016/j.ecolind.2021.108180

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Remote sensing estimation of the concentration and sources of coloured dissolved organic matter based on MODIS: A case study of Erhai lake
	Zhang, Hao 2,3; Yao, Bo 1; Wang, Shengrui 2,3; Wang, Guoqiang 2
刊名	ECOLOGICAL INDICATORS
	2021-11-01
卷号	131 页码:12
关键词	CDOM Fluorescence index Empirical algorithm Semi-empirical algorithm Erhai Lake
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2021.108180
通讯作者	Wang, Shengrui(wangsr@bnu.edu.cn)
英文摘要	The use of satellite remote sensing to estimate coloured dissolved organic matter (CDOM) and identify its potential sources is important for monitoring lake water quality and implementing management strategies. In this study, taking Erhai Lake as an example and based on MODIS/Aqua satellite images and in-situ measured data, we used empirical and semi-empirical methods to develop algorithms for CDOM and the fluorescence index (FI370) from remote sensing reflectance (Rrs(lambda)). The temporal and spatial distributions of the CDOM concentration and FI370 in Erhai Lake during 2013-2019 were retrieved. The results show the following. (1) The band ratio (Rrs (469)+Rrs(645))/Rrs(555) model could estimate the CDOM absorption coefficient at 412 nm (aCDOM(412)) (R2=0.507), and it was relatively stable. Using the band ratio Rrs(645)/Rrs(469) combined with the chlorophylla (Chl-a) APProach by ELimination (APPEL) model, a semi-empirical inversion model of FI370 performed with satisfactory accuracy (R2=0.550) and was more accurate than the empirical algorithm (R2=0.505). (2) During the period of 2013-2019, the CDOM concentration in Erhai Lake generally decreased from the northern to the central to the southern parts of the lake, and the CDOM concentration was higher in summer and autumn than in spring and winter. FI370 was higher in the northern and western coastal waters and lower in the central, southern and eastern parts of the lake. FI370 in autumn and winter was higher than that in spring and summer. CDOM was affected by both terrestrial and internal sources, and their relative contributions were not the same in different seasons. (3) For different Chl-a concentrations, different CDOM concentration models had better retrieval effects, i.e., Rrs(645))/Rrs(555) and (Rrs(469)+Rrs(645))/Rrs(555) had the best performance when Chl-a 10 mu g/L and Chl-a 10 mu g/L, respectively. The inversion models established in this study offer improved quantifications of the CDOM concentration and the FI370 in Erhai Lake, providing important support for monitoring water quality and implementing efficient management strategies.
资助项目	National Natural Science Foundation of China[U1902207] ; Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed[2020-02-2-W2] ; Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed[2020-02-2-W3] ; National Major Science and Technology Program for Water Pollution Control and Treatment[2018ZX07701001-17] ; China Postdoctoral Science Foundation[2019M660521]
WOS关键词	IMAGING SPECTRORADIOMETER MODIS ; OPTICAL-PROPERTIES ; COASTAL WATERS ; CDOM ABSORPTION ; CHLOROPHYLL-A ; TROPHIC STATE ; CARBON ; MODELS ; SEA ; DYNAMICS
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
WOS记录号	WOS:000704554400005
资助机构	National Natural Science Foundation of China ; Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed ; National Major Science and Technology Program for Water Pollution Control and Treatment ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87584]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者	Wang, Shengrui
作者单位	1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 2.Beijing Normal Univ, Coll Water Sci, Engn Res Ctr, Minist Educ Groundwater Pollut Control & Remediat, Beijing 100875, Peoples R China 3.Beijing Normal Univ, Ctr Water Res, Guangdong Hong Kong Joint Lab Water Secur, Zhuhai 519087, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hao,Yao, Bo,Wang, Shengrui,et al. Remote sensing estimation of the concentration and sources of coloured dissolved organic matter based on MODIS: A case study of Erhai lake[J]. ECOLOGICAL INDICATORS,2021,131:12.
APA	Zhang, Hao,Yao, Bo,Wang, Shengrui,&Wang, Guoqiang.(2021).Remote sensing estimation of the concentration and sources of coloured dissolved organic matter based on MODIS: A case study of Erhai lake.ECOLOGICAL INDICATORS,131,12.
MLA	Zhang, Hao,et al."Remote sensing estimation of the concentration and sources of coloured dissolved organic matter based on MODIS: A case study of Erhai lake".ECOLOGICAL INDICATORS 131(2021):12.