基于高光谱耦合建模的干旱遥感反演技术

The social and economic sustainable development, even the local people's basic survive, were seriously affected by the sustained drought in Southwest China. It has great significance to carry out the drought monitoring based on Hyperspectral Remote Sensing which makes it possible to early warning of regional drought accurately and dynamically. Based on the explicit spectrum segmentation of Hyperspectral Remote Sensing data, this propose will take the crown water content and crown temperature of typical vegetations in the central Yunnan Plateau of Southwest China as research subject, and the relationship between the crown water content and crown temperature of typical vegetation, which is linear or nonlinear, will be analyzed. Also, the suitable spectrum band range to drought monitoring using Hyperspectral Remote Sensing data will be proposed, and the precision retrieval between the crown water content and crown temperature will be carried out. By using the method of Multiple Correspondence Analysis (MCA), the coupling modeling between the crown water content and crown temperature will be built, which will supply the theory basis and the technical support to lately regional drought remote sensing monitoring research.

近年来，发生在我国西南地区的持续干旱已严重影响了当地社会、经济的可持续发展，甚至给当地群众的基本生活带来严重威胁。开展基于高光谱的干旱遥感反演技术研究，使精确、及时、动态监测与区域性干旱预警成为可能，具有十分重要的意义。本项申请以西南地区滇中高原典型陆地植被冠层水分和温度为遥感反演的主要目标，使用分割更为精细的高光谱遥感数据，研究典型陆地植被的冠层水分和冠层温度与光谱反射率之间的关系（分段线性或非线性关系），提出基于冠层水分和冠层温度的干旱区典型植被高光谱干旱遥感监测的波段范围，并对冠层水分和冠层温度进行定量反演，利用多重对应分析方法（MCA）对冠层水分和冠层温度进行耦合建模，形成基于高光谱遥感数据的干旱遥感监测技术，为今后区域性干旱遥感监测领域的研究提供理论依据和技术支持。

开展基于高光谱的干旱遥感反演技术研究，使精确、及时、动态监测与区域干旱预警成为可能，具有重要意义。本项目应用高光谱遥感反演技术，分别从云南省气候特征及变化过程研究、干旱区典型植被干旱监测的高光谱通道选取、干旱区典型植被冠层水分高光谱反演模型的建立、干旱区典型植被冠层温度高光谱反演模型的建立、冠层水分与冠层温度耦合建模及模型联合验证和云南省潜在蒸散及旱情分布分析等6方面开展研究，对干旱监测中最为常用的冠层水分和温度分别进行了精确反演，并对干旱区典型植被冠层水分和温度进行耦合建模，形成了具有精度保证的干旱高光谱遥感反演技术，按照预期计划实现了预定研究目标，获得了丰硕的研究成果，形成了研究方向固定、分工明确的科研团队。通过本项目的研究，共发表论文论著32篇，其中，SCI检索收录论文2篇，学术专著1部，中文核心期刊论文26篇，一般期刊论文3篇；培养硕士研究生10名。本项目的研究成果将对提高干旱监测、预警和防灾、减灾能力建设，增强社会经济可持续发展具有重要推广意义，为今后干旱遥感监测技术发展提供了理论指导和技术支撑。