鄱阳湖浑浊水体溶解性有机碳遥感探测机理与反演方法研究

项目名称： 鄱阳湖浑浊水体溶解性有机碳遥感探测机理与反演方法研究

项目编号： No.41471298

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 天文学、地球科学

项目作者： 王野乔

作者单位： 江西师范大学

项目金额： 88万元

中文摘要： 溶解性有机碳（DOC）是水体中最大的有机碳储库，在碳循环中起到重要作用。本研究围绕鄱阳湖动态变化和浑浊水体的复杂水环境特点，开展DOC的遥感探测机理和反演模型研究。内容包括选取不同浑浊条件下的试验区，通过定位定时观测和水样采集检测，获取水体遥感反射率、CDOM吸收系数、DOC浓度、悬浮泥沙浓度、叶绿素浓度等数据；从而研究内陆大型湖泊浑浊水体中干扰因素与DOC之间的波谱信息机理；开展最佳CDOM-DOC反演波段分析，通过可区分CDOM和非生物悬浮颗粒的波谱反射率的分析，建立适合于鄱阳湖浑浊水体的DOC遥感反演的QAA-CDOM算法和带功能性协变量FLM模型；并通过验证反演算法、改进遥感反演的精度和DOC的遥感探测。本研究将提升对内陆湖泊浑浊水体DOC的认识，为探讨典型大湖水体DOC的时空分布规律和量化，提高监测DOC从河流输运到大湖水体的准确度，推动内陆水系统碳循环的研究奠定基础。

中文关键词： 溶解性有机碳；浑浊水体；高光谱遥感；反演模型；鄱阳湖

英文摘要： Dissolved organic carbon (DOC) is the largest organic carbon component in inland water system and plays an important role in carbon cycle process. This study will focus on the complexity of dynamic fluctuation and turbid water environment of the Poyang Lake to study the mechanism and inversion modeling of DOC from remote sensing. It will select different turbid water conditions as the testing sites, by controlled time and location sampling and measurements, to obtain the data for spectral reflectance, absorption of CDOM, density of DOC and density of suspended sediment, chlorophyll content, in order to study the mechanism of information for DOC and the factors affecting the spectrum of large inland lake of turbid water; to reveal the best spectrum in inversion modeling; and to establish QAA-CDOM algorithm and FLM model that will be appropriate to the turbid water of the Poyang Lake, and by verification of the inversion algorithm to improve accuracy of remote sensing of DOC. This study will improve our understanding of DOC in inland large turbid water lake, pave the foundation for understanding the spatial and temporal distribution and quantitative analysis of DOC, to improve the accuracy of estimating the amount of DOC transported from rivers to large lakes, and enhance studies of carbon cycle in the inland water system.

英文关键词： Dissolved organic carbon (DOC);Turbid water;Hyperspectral remote sensing;Inversion model;Poyang Lake