基于生态足迹的常德市土地生态安全研究

Research of land ecological safety based on ecological footprint in Changde City

运用生态足迹模型分析了常德市2002～2006年的生态足迹的动态变化,初步探讨了常德市土地生态系统安全情况.结果显示：常德市人均生态足迹从2002年的1.91794hm^2增加到2006年的2.50993hm^2,而同期的人均生态承载力则由0.52785hm^2下降到0.51623hm^2,人均生态赤字由1.39009hm^2增大为1.99370hm^2,生态压力指数由3.26上升为4.22;万元GDP生态足迹从2.58859hm^2逐渐下降为2.10749hm^2.研究表明：虽然常德市对资源的利用效率在不断提高,但常德市的发展模式是不可持续的,土地生态系统始终处于超负荷状态,土地生态系统处于危险状态.

Based on analyzing the dynamic change of ecological footprint in Changde City from 2002 to 2006 by the ecologyical footprint model, the land ecological security of Changde City was studied. The results showed that the ecological footprint per capita in Changde City increased from 1.917 94 hm^2 in 2002 to 2.509 93 hm^2 in 2006, whereas, the ecological capacity per capita decreased from 0.52785 hm^2 to 0.51623 hm^2 the ecological deficit per capita increased from 1.390 09 hm^2to 1.99 370 hm^2; the ecological tension index increased from 3.26 to 4.22;The 10 thousands YUAN GDP ecological footprint decreased from 2.588 59 hm^2 to 2.107 49 hm^2.The results indicated that the development model of Changde City was not sustainable, from 2002 to 2006, and the land resource was almost in the ecology over burden condition, suggesting that the land ecological environment is at risk.