Construction of an eco-risk assessment system in arid-oasis areas of China based on RS and GIS model
IGARSS（2012）
摘要
Based on landscape ecology, this study uses the mathematic models which reflect the landscape structure, dominance and heterogeneity, to build an eco-risk assessment method which can be applied in arid-oasis areas. Using the eco-risk assessment method and the field data measured in 2000 and 2011, we conduct a case study on the eco-risk assessment in the Hei River Basin, which is a typical arid-oasis ecosystem in China. Our results show that the total ecological risk value in the Hei River Basin has decreased from13.7 to 8.3 in the past 10 years and now the northern area is in greater risk than other areas. We can conclude that the eco-risk assessment method presented here can detect the spatial distribution and the time series change of the eco-risk in arid-oasis area. This method could assist environmental management decision making for arid-oasis ecosystem in the future.
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关键词
arid-oasis ecosystem,terrain mapping,field data,remote sensing,landscape ecology,arid-oasis area,geographic information systems,china,landscape structure,rivers,gis model,eco-risk assessment system,image classification,hei river basin,risk analysis,ecological risk value,environmental management decision making,time series change,ad 2000,spatial distribution detection,geophysical image processing,environmental management,risk management,landscape dominance,landscape heterogeneity,vegetation mapping,mathematic model,ad 2011,time series,ecology,earth,ecosystems,silicon,measurement,indexes
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