能值分析法在松嫩平原生态足迹模型研究中的应用

在简要分析传统生态足迹模型的基础上,提出了基于能值分析法的生态足迹模型。引入能值密度,将生态经济系统的各种能量流转换为生物生产性土地面积,进行生态足迹的定量计算。以松嫩平原为例,进行2004年松嫩平原生态足迹量化研究。结果表明:松嫩平原的能值密度为8.713×1014sej/hm2,人均生态足迹为4.871hm2/人,人均生态承载力为2.034hm2/人,人均生态赤字为2.837hm2/人,处于不可持续发展状态,这一结果与采用传统生态足迹模型计算结果保持一致。与传统模型相比,能值分析-生态足迹复合模型克服了传统生态足迹模型评价标准不统一,研究结果可比性差等缺陷,评价结果更具有客观性和真实性。

Application of ecological footprint model on Songnen plain based on emergy analysis

A composite model of ecological footprint based on emergy analysis was put forward.Concept of emergy density was introduced into the calculation model to transform all kinds of energy flows in eco-economic systems into the corresponding biological productive units.The ecological footprint of Songnen plain in 2004 was studied.The results showed emergy density was 8.713×1014sej/ha,ecological footprint of biological and energy resources was 4.871 ha/cap,ecological capacity was 2.034 ha/cap,and ecological deficit was 2.837 ha/cap.So we concluded that the ecological environment of Songnen plain was in the state of unsustainable development.The calculation results conformed to that of conventional one.It can be seen that the model based on emergy analysis is more reasonable and objective by overcoming the disadvantages of inconsistency of evaluation standards,poor comparison etc.