【摘要】 北京市大兴县科学营造网、带、片、点结合的防护林体系 ,极大地改善了当地的生态环境 ,使社会发展水平和人民生活水平稳步提高 .防护林建设效果分析与评价的结果显示 ,在亚湿润干旱荒漠化地区 ,采用以防护林体系建设为主的治沙措施后 ,生态环境显著改善 ,防护林体系建设对环境的影响主要体现为正效应 .该文对大兴县防护林体系建设的效果及对当地环境的影响进行的评价 ,既丰富了环境影响评价理论 ,拓宽了环境影响的评价范围 ,又对类似地区的防护林建设提供了经验借鉴更多还原

【Abstract】 Windbreak system consisting of the forms of net, belt, sheet and point, has improved local eco environment greatly and promoted the level of social economy and local people’s living. The result of environment impact assessment shows that the quality of eco environment has been improved obviously and the impact process is mainly positive after building of windbreak system in Daxing County of Beijing, a dry sub humid region. Effects of windbreak system and their environmental impacts are analyzed scientifically and reasonably in this paper. The study will enrich the theory of environment impact assessment and extend the scope of research, and will provide experience for the construction of windbreak system in the region.更多还原