The Dynamic Evaluation Of Ecological Security In Sanjiang Plain Over The Past30Years

Since the end of the Second World War, food shortages, population explosion, excessiveconsumption of natural resources, wanton emissions of toxic gases, environmentaldegradation and its breeding is growing, and has begun to threaten human survival anddevelopment. For this phenomenon, research on the ecological safety came into being, thepossibility to provide for the sustainable development of mankind.The Sanjiang Plain, located in the eastern part of Heilongjiang Province in China, alsothe northeast part of Chinese Northeast Plain, is the largest swamp distribution in China.Sanjiang Plain has huge kinds of species, which birds, peat and plant are particularly knownfor, and is one of the important commodity grain production base in China, mainly producingsoybeans and darley. The ecological security of the Sanjiang Plain has a strategic significancefor the ecological security, species richness and food security of our country.Domestic ecological security study of the specific region mostly focus on small-scalecity, however the analysis of large-scale watershed are rare at present. In this paper, anoverview of the research progress of the concept of ecological security and ecological securityat home and abroad, summarized the methods of Ecological security assessment model basedon, on the base of the study of ecological security Pressure-State-Response model,combined with the characteristics of the Sanjiang Plain study area was constructed in theSanjiang Plain ecological safety evaluation index system. Draw on the analytic hierarchyprocess for the establishment of ecological security assessment index system of the SanjiangPlain and landscape ecological security assessment index system of the Sanjiang Plain andlandscape ecological model law, physical geography, human geography and land-use dynamicdata, the Sanjiang Plain in1976,1986,1995,2000and2005nearly30years, the time span ofthe ecological security status analysis and evaluation; the final results of the analysis, givesthe corresponding counter measures and suggestions.