Abstract:

Based on the ecological sensitivity-resilience-pressure (SRP) conceptual model, methods of spatial principal component analysis (SPCA) and analytic hierarchy process (AHP) were combined to evaluate and classify the vulnerabilities of the eco-environment of Luanhe basin in 1985, 1995 and 2005, and 15 multiple systems evaluation indexes including topography, geomorphology, atmosphere, soil, vegetation and social economy were taken into account in this evaluation.  Ecological environmental vulnerability variation and genetic mechanism were obtained.The results showed that vulnerability level of Luanhe basin tended to be low, potentially vulnerable area was expanded and severe vulnerable area was reduced. Meanwhile eco-environmental vulnerability of northwest mountainous regions and jidong coastal areas changed acutely. Human activities had exceeded natural conditions and become the key factor which impacted ecosystem of Luanhe basin. The primary driving force were rapid growth of the population, change of weather conditions and irrational utilization of land resources.

Key words: eco-environmental vulnerability, spatial principal component analysis, analytic hierarchy process, SRP conceptual model, Luanhe basin