DISCUSSIONS ON VULNERABLE ECOLOGICAL ENVIRONMENT CONCEPT BY A CASE
区分了脆弱生态环境与退化生态环境的概念，提出潜在脆弱性与现实脆弱性、绝对退化与相对退化等概念，并以衡阳盆地为例评估了1984年和2000年的脆弱性与退化程度。
Based on discriminating the vulnerable ecological environment concepts and the degraded ecological environments concept,the paper has differentiated a couples of concepts—potential vulnerability and realistic vulnerability,and comes with a standpoint that the degradation be relative to a benchmark,and based on which,brings up the two couples of concepts—Original Benchmark and Staggered Benchmark,Absolute Degradation and Relative Degradation,and then takes the indirect appraising method based on the vulnerability appraising to appraise the degree of degradation.To annotation above the standpoints,the paper takes Hengyang basin as a case study to appraise the potential vulnerability and the realistic vulnerability respectively in the year 1984 and 2000,and then based on which appraises the degree of Absolute Degradation respectively in the year 1984 and 2000,and the degree of Relative Degradation between 1984 and 2000.