| Retrieval of chlorophyll a and suspended solid concentrations by hyperspectral remote sensing in Taihu Lake, China |
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| 作者姓名： | 杨顶田 潘德炉 张霄宇 张晓峰 何贤强 李淑菁 |
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| 作者单位： | [1]Key Laboratory of Tropical Marine Environmental Dynamics （LED）, South China Sea Institute of Oceanography, Chinese Academy of Sciences, Guangzhou 510301, China [2]State Key Laboratory of Satellite Ocean Environment Dynamics, Second Istitute of Oceanography, SOA, Hangzhou 310012,China [3]不详, Second Istitute of Oceanography, SOA, Hangzhou 310012,China |
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| 基金项目： | 国家自然科学基金;广东省自然科学基金;国家高技术研究发展计划(863计划) |
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| 摘 要： | Chlorophyll α（ch1-α） and suspended solid concentrations are two frequently used water quality parameters for monitoring a lake. Traditional measurement of ch1-α and suspended solids, requiring laborious laboratory work, which is often expensive and time consuming. Hyperspectral remote-sensing measurement provides a fast and easy tool for estimating water trophic status. In situ hyperspectral data on March 7-8, July 6-7, September 20 and December 7-8, 2004 and the corresponding water chemical data were used to regress the algorithm of water quality parameters. Results showed that the peak of water leaving radiance around 700 nm （R700） varied proportionally with ch1-α concentration, and moved to infrared when algal bloom occurred. The reflectance ratio of R702/R685 was well correlated with ch1-α when water surface in no algal bloom case and the correlation coefficient was better if absorption of phycocyanin was considered. The reflectance ratio R620/R531 was highly correlated to the concentration of suspended solids. The relationship between suspended solids and other band groups were also compared. Secchi disk depth could be calculated by non-linear correlation with suspended solids concentration.
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| 关 键 词： | 遥感技术 叶绿素 悬浮固体 太湖 |
| 收稿时间： | 2005-04-15 |
| 修稿时间： | 2005-10-12 |
Retrieval of chlorophylla and suspended solid concentrations by hyperspectral remote sensing in Taihu Lake, China |
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| Yang Dingtian,Pan Delu,Zhang Xiaoyu,Zhang Xiaofeng,He Xianqiang,Li Shujing.Retrieval of chlorophyll a and suspended solid concentrations by hyperspectral remote sensing in Taihu Lake, China[J].Chinese Journal of Oceanology and Limnology,2006,24(4):428-434. |
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| Authors: | Yang Dingtian Pan Delu Zhang Xiaoyu Zhang Xiaofeng He Xianqiang Li Shujing |
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| Institution: | (1) Key Laboratory of Tropical Marine Environmental Dynamics (LED), South China Sea Institute of Oceanography, Chinese Academy of Sciences, 510301 Guangzhou, China;(2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, SOA, 310012 Hangzhou, China |
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| Abstract: | Chlorophylla (chl-a) and suspended solid concentrations are two frequently used water quality parameters for monitoring a lake. Traditional measurement
of chl-a and suspended solids, requiring laborious laboratory work, which is often expensive and time consuming. Hyperspectral remote-sensing
measurement provides a fast and easy tool for estimating water trophic status.In situ hyperspectral data on March 7–8, July 6–7, September 20 and December 7–8, 2004 and the corresponding water chemical data
were used to regress the algorithm of water quality parameters. Results showed that the peak of water leaving radiance around
700 nm (R
700) varied proportionally with chl-a concentration, and moved to infrared when algal bloom occurred. The reflectance ratio ofR
702/R
685 was well correlated with chl-a when water surface in no algal bloom case and the correlation coefficient was better if absorption of phycocyanin was considered.
The reflectance ratioR
620/R
531 was highly correlated to the concentration of suspended solids. The relationship between suspended solids and other band
groups were also compared. Secchi disk depth could be calculated by non-linear correlation with suspended solids concentration.
Supported by National Natural Science Foundation of China (No. 40576078), Natural Science Foundation of Guangdong Province
(No. 5003685), Post-Doctor Foundation of China, Post-doctor Foundation of Zhejiang Province, Post-Doctor Foundation of Shanghai
and the National High-Tech R&D of China (863 Program) (No. 2002AA639490) |
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| Keywords: | hyperspectral remote sensing chlorophyll a suspended solids Taihu Lake |
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