基于生态绿当量的土地利用结构优化——以岳麓山风景名胜区为例

运用生态绿当量数学模型,计算湖南省岳麓山风景名胜区各类用地的绿当量和总绿当量,探讨了生态旅游系统土地利用结构优化的生态标准,以评价其生态旅游环境。结果表明,目前岳麓山生态旅游景区的森林覆盖率略低于最佳森林覆盖率,林地分布不均,生态体系不够完善,但其整体绿当量(1.13)高于最佳森林覆盖率对应的绿当量(1.00)。岳麓山生态旅游景区的土地资源利用结构较为合理,但林地分布不均。基于评价结果,提出了岳麓山风景名胜区土地利用结构的优化措施,1)通过提高岳麓山脉以外地区的绿地面积,促使岳麓山的森林覆盖率达到理想水平;2)在符合生态优先的前提下,进行人文景观开发、基础设施建设。

Optimization of land use structure based on ecological green equivalent: a case study in Mt. Yuelu Scenic Area

This paper incorporated the ecological green equivalent to evaluate land use structure of Mt. Yuelu Scenic Area in Hunan Province. Based on the concept of ecological green equivalent, the ecology green equivalent mathematical model was established using land use and land cover data in 2005. Results showed that Mt. Yuelu Scenic Area had a relatively reasonable land use structure even though the forest coverage rate was slightly lower than the optimum forest coverage rate. Furthermore, the distribution of forest was uneven. However, its overall green equivalent (1.13) was higher than the corresponding optimum forest coverage ecological green equivalent (1.00). This was determined by the fact that most of the forest is in Mt. Yuelu. Consequently, Mt. Yuelu Scenic Area land use structure could be improved by improving green areas outside of Mt. Yuelu. In addition, landscape development and infrastructure construction should consider ecological system conditions.