Document Detail


Evaluation of hyperspectral indices for chlorophyll-a concentration estimation in Tangxun Lake (Wuhan, China).
MedLine Citation:
PMID:  20644681     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Chlorophyll-a (Chl-a) concentration is a major indicator of water quality which is harmful to human health. A growing number of studies have focused on the derivation of Chl-a concentration information from hyperspectral sensor data and the identification of best indices for Chl-a monitoring. The objective of this study is to assess the potential of hyperspectral indices to detect Chl-a concentrations in Tangxun Lake, which is the second largest lake in Wuhan, Central China. Hyperspectral reflectance and Chl-a concentration were measured at ten sample sites in Tangxun Lake. Three types of hyperspectral methods, including single-band reflectance, first derivative of reflectance, and reflectance ratio, were extracted from the spectral profiles of all bands of the hyperspectral sensor. The most appropriate bands for algorithms mentioned above were selected based on the correlation analysis. Evaluation results indicated that two methods, the first derivative of reflectance and reflectance ratio, were highly correlated (R(2) > 0.8) with the measured Chl-a concentrations. Thus, the spatial and temporal variations of Chl-a concentration could be conveniently monitored with these hyperspectral methods.
Authors:
Yaohuan Huang; Dong Jiang; Dafang Zhuang; Jingying Fu
Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-27
Journal Detail:
Title:  International journal of environmental research and public health     Volume:  7     ISSN:  1660-4601     ISO Abbreviation:  Int J Environ Res Public Health     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-07-20     Completed Date:  2011-06-14     Revised Date:  2013-05-29    
Medline Journal Info:
Nlm Unique ID:  101238455     Medline TA:  Int J Environ Res Public Health     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  2437-51     Citation Subset:  IM    
Affiliation:
Data Center for Resources and Environmental Sciences, State Key Lab of Resources and Environmental Information System, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China. huangyh@lreis.ac.cn
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MeSH Terms
Descriptor/Qualifier:
Algorithms
China
Chlorophyll / analysis,  chemistry*
Environmental Monitoring / instrumentation,  methods*
Eukaryota / chemistry
Fresh Water / analysis,  chemistry*
Geography
Harmful Algal Bloom
Humans
Linear Models
Phytoplankton
Regression Analysis
Statistics as Topic
Time Factors
Water Pollution, Chemical / analysis*
Water Supply / analysis*
Chemical
Reg. No./Substance:
1406-65-1/Chlorophyll
Comments/Corrections

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