南水北调中线工程水源所在地南阳市生态安全现状定量分析

Quantitative Analysis on Ecological Security Status of Nanyang City—Water Source of Middle Route Project of South-to-north Water Transfer

基于生态足迹理论,对南水北调中线工程水源所在地南阳市的生态安全现状进行了定量分析。结果表明,南阳市2005年人均生态足迹为0.992 1 hm2,人均生态承载力为0.494 6 hm2,生态压力指数为2.006,说明水源所在地南阳市的生态环境正处于一种极不安全的临界状态。

Based on ecological footprint theory, the ecological security status of Nanyang City that water source of middle route project of south-to-north water transfer was quantitatively analyzed. The results showed that the per capita ecological footprint of Nanyang City in 2005 was 0.992 1 hm^2, the per capita ecological carryiog capacity was 0.494 6 hm^2, the ecological tension index was 2.006, which indicated that the ecological environment of water resource Nanyang City was in a critical state that extremely unsafe.