西北干旱区生态环境建设评价初探

1997年 8月 5日江泽民总书记在关于治理水土流失建设生态农业的批示中提出了“再造一个山川秀美的西北地区”的伟大号召。在党中央、国务院的西部大开发战略决策中 ,把加强生态环境保护和建设作为关系大开发全局的重点工作 ,特别是在西北干旱区开发建设中生态优先已成为共识。因此 ,如何理解和界定山川秀美 ,如何反映西部干旱区生态环境建设的进展和成果 ,如何评价各区域生态环境建设的成就、生态工程项目及流域综合治理的效果 ,建立科学合理的评价体系是极为必要的。1　对山川秀美的理解与界定1.1　山川秀美与林业生态体系的关系江总书记提…

Preliminary Discussion on Evaluation of Eco-Environment Construction in Arid Area of Northwest China

The concept of "beautiful mountains and valleys" is proposed in the paper as well as its evaluation index system. Further more, preliminary discussion is made on the evaluation of eco-environment construction in the arid area of Northwestern China. The concept is put forward in view of the severe desertification in Northwestern China and needs the establishment of an integrated ecosystem to be realized. The maintenance and balance of the ecosystem should be achieved by biological measures. The integrated forestry ecosystem is the final goal of "beautiful mountains and valleys", which can be reached through long-term development and construction. The semi-integrated forestry ecosystem is a temperary goal of "beautiful mountains and valleys", which also needs a long time to realize. Followings suggestions are proposed based on the construction of semi-integrated forestry ecosystem: partition of natural geo-region in the arid area of Northwestnre China; partition of unit for evaluating the forestry ecosystem; setting up principles and requirements for the evaluation index system; selecting indexes for forestry eco-environment evaluatian; determination of index weights; thoughts and establishing methods for forestry ecosystem evaluation.