关键词: 干旱区, 生态环境, 遥感反演, 评价模型

Abstract: Considering the insufficiency of conventional observational means in arid eco-environmental monitoring, this paper examines the requirements for eco-environmental monitoring, as well as the characteristics of the land cover types and climate in arid areas. According to the needs for eco-environmental monitoring and assessment tasks in the arid areas, remote sensing inversion technology was incorporated into the estimation of significant eco-environmental parameters and variables, based on which further assessment models were correspondingly built. In the Microsoft .Net environment, the ArcEngine GIS component was applied to develop the software modules for remote sensing image data visualization and spatial analysis functions, and the IDL language was used to implement the algorithms for remote sensing inversion for the estimation of the land surface variables. Finally a computer system for remote sensing based inversion and assessment of eco-environmental variables and quality in the Shihezi area were implemented and integrated. This system was practically utilized for eco-environmental monitoring and assessment in the study area afterwards. The results show that the system can be operated steadily and is quite useful for rapid estimation of regional significant eco-environmental variables such as vegetation index, soil moisture, land surface temperature, fractional vegetation coverage, net primary productivity, and so on. The system can also aid in the eco-environmental assessment tasks and offer technical support and promote the use of geospatial technology for eco-environmental protection and monitoring in the arid areas.

Key words: arid areas, eco-environment, remote sensing inversion, assessment models