Surface albedo is widely used in energy balance of the earth surface, weather forecast, global change research and water
circulation. The different land surface features and land cover conditions can cause the anisotropy of surface albedo
distribution. It is a powerful tool to derive large area of regional surface albedo using remote sensing technique. Based on
a topographic and atmospheric correction, different band integration approaches form ETM were attempted to obtain the
surface albedo over the upper reaches of Tarim River. The relationship between land surface albedo and land use type is
researched by taking account of the particularity of the basin's geography character.
The ecosystem risk assessment is an essential decision making system for predicting the reconstruction and recovery of a
damaged ecosystem after intensive mankind activities. The sustainability of environment and resources of the lake
ecosystem in arid districts have been paid close attention to by international communities as well as numerous experts
and scholars. The ecological risk assessment offered a scientific foundation for making the decision and execution of
ecological risk management. Bosten Lake, the largest inland freshwater lake in China, is the main water source of the
industrial and agricultural production as well as the local residence in Yanqi basin, Kuara city and Yuri County in the
southern Xinjiang. Bosten Lake also provides a direct water source for emergency transportation in the Lower Reaches
of Tarim River. However, with the intensive utilizations of water and soil resources, the environmental condition in the
Bosten Lake has become more and more serious. In this study, the theory and method of landscape ecological risk
assessment has been practiced using 3S technologies combined with the frontier theory of landscape ecology. Defining
the mainly risk resource including flood, drought, water pollution and rich nutrition of water has been evaluated based on
the ecosystem risk assessment system. The main process includes five stages: regional natural resources analysis, risk
receptor selection, risk sources evaluation, exposure and hazard analysis, and integrated risk assessment. Based on the
risk assessment results, the environmental risk management countermeasure has been determined.
The Tarim River basin is an ecologically sensitive area and a key area for biodiversity protection and global-change
research. Based on the research on oasis-desert ecosystem, with the frontier theory of landscape ecology, spatial
differences of landscape of Yuli oasis are analyzed through the technological train of 3S and statistics. The paper puts
forwards some suggestions for landscape ecological construction. Studies on landscape pattern within the research area
are important for the sustainable development and conservation of the entire basin.
Based on research on the oasis-desert ecosystem, changes in land use of the Akesu-Awati oasis from 1990 to 2000 are analyzed through using the methods of 3S and statistics. A classification system of land use is created and 3S-integration is realized. Using the table of equivalent weight factors of the economic value of China's ecosystem services, the loss of ecological value resulting from land use changes are estimated. This research shows that changes of land use are notable. Areas of land use such as cropland, residential site and saline land amount increase rapidly in contrast to various degrees of reduction in grassland, forest land, water area and wetland. The ecological value has become negative, decreasing by 1.055×109 yuan. Given such great losses in the estimated economic value of ecosystem services, it is clear that the best development of society and economy in the research area will be achieved only through comprehensive, planned sustainable development.
We studied changes in the oasis-desert ecosystems of Akesu Oasis in Xingjiang, China. We used the ‘frontier theory’ of landscape ecology to analyze changes from 1990 to 2000. The results show that considerable landscape changes occurred during that time as a result of changes in both natural and social-economic factors. However, the influence of socioeconomic factors predominated.