首页 | 本学科首页   官方微博 | 高级检索  
     

真光层深度的遥感反演及其在富营养化评价中的应用
引用本文:乐成峰,李云梅,查勇,孙德勇,王莉珍. 真光层深度的遥感反演及其在富营养化评价中的应用[J]. 生态学报, 2008, 28(6): 2614-2614~2621
作者姓名:乐成峰  李云梅  查勇  孙德勇  王莉珍
作者单位:南京师范大学,江苏省地理信息科学重点实验室,南京,210046
基金项目:国家自然科学基金 , 南京师范大学留学回国人员科研启动基金
摘    要:真光层深度直接影响水体中浮游植物的分布和初级生产力以及水体生态环境,是水生态研究的一个重要参数.利用2006年10月24日~11月2日太湖水下实测光谱数据和光合有效辐射(PAR)数据,通过数据的处理和分析,尝试建立真光层深度与水面以下遥感反射率的关系模型,并利用真光层深度与透明度的关系,建立水体富营养化真光层深度评价模型.研究结果表明:真光层深度与归一化遥感反射率具有很好的相关性;选用特定波段的归一化反射率作为变量,建立两者的关系模型能较好的反演真光层深度,所建立的模型算法中,指数模型拟合方程的综合效果好于其他模型,波段比值算法反演精度要好于单波段算法;利用利用真光层深度进行富营养化评价具有一定的应用价值,利用该模型对太湖水体进行富营养化评价,得出太湖西部湖区大部分已富营养化,东部湖区处于中营养化和轻度富营养化状态.

关 键 词:真光层深度  遥感反射率  反演模型  富营养化评价  真光层深度  遥感反演  营养化评价  应用  depth  eutrophication  assessing  application  reflectance  in situ  状态  轻度  东部  富营养化  湖区  湖西  太湖水体  价值  反演精度  模型算法
收稿时间:2007-03-19
修稿时间:2007-12-12

Euphotic depth: retrieval from in situ reflectance and application in assessing eutrophication
LE,nbsp;Cheng-Feng,,nbsp;LI,nbsp;Yun-Mei,,nbsp;ZHA,nbsp;Yong,,nbsp;SUN,nbsp;De-Yong,,nbsp;WANG,nbsp;Li-Zhen. Euphotic depth: retrieval from in situ reflectance and application in assessing eutrophication[J]. Acta Ecologica Sinica, 2008, 28(6): 2614-2614~2621
Authors:LE   Cheng-Feng,   LI   Yun-Mei,   ZHA   Yong,   SUN   De-Yong,   WANG   Li-Zhen
Affiliation:Nanjing Normal University Jiangsu Provincial Key Laboratory of Geography Information Science, Nanjing 210046, China
Abstract:Euphotic depth is one of the most important variables in the study of an aquatic ecological system. This variable has direct effects on the distributing of phytoplankton and net primary production of waters. The underwater reflectance and photosynthetic available radiation (PAR) data were collected from Oct. 24 to Nov. 2, 2006 in Taihu Lake. For retrieving euthotic depth, a variety of relationship models were attempted in which in situ reflectance at a single band or band ratio was regressed onto measured euthotic depths. The eutrophication of Taihu Lake was then assessed based on the correlation of this parameter to transparency which was derived from the estimated euthotic depth. The results indicate that euphotic depth and normalized in situ reflectance are highly correlated, and the relationship models can be sued to accurately retrieve euphotic depth from a specified spectral variable; among the algorithms examined, exponential equations performed better than other relationships; and the models with the band-ratio resulted in higher retrieving accuracy than those using a single band; the assessment of the eutrophication with euphotic depth has proved to be a valuable and applicable approach. The application of this model to Taihu lake indicates that the western area of the lake was serious eutrophic, and the eastern area of the lake was mesotropher and light eutrophic.
Keywords:Euphotic depth   remote sensing reflectance   retrieval model   eutrophication assessment
本文献已被 维普 万方数据 等数据库收录!
点击此处可从《生态学报》浏览原始摘要信息
点击此处可从《生态学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号