基于生态服务价值的潮白河上游土地利用优化

Land use pattern optimization based on eco-service value in the upper Chaobai River Basin

生态环境安全和人类发展息息相关,以潮白河上游森林生态服务价值和生态服务总价值为目标,以约束函数和转化规则为条件,利用灰参数线性规划理论和CLUE-S模型对该区2008年土地利用现状进行了数量结构优化和空间格局配置。结果表明:优化配置后的林地面积和森林生态服务价值较2008年均有显著增加,且后者增加幅度大于前者,说明森林单位面积生态服务价值提高,林地结构得到改善;随着草地和未利用地向林地和居民工矿用地转化,生态服务总价值有所增加,重点表现在调节服务和支持服务两方面价值上。该区域近年来经济利益驱动的发展模式给首都可持续发展带来巨大压力,土地退化和环境破坏须通过资源优化得以控制和改善。

The ecological environmental security and human development are closely related. With the forest eco-service value and the total value of eco-service as main aims,the constraint functions and transformation rules as conditions; the land use situation analysis in 2008 was conducted in number optimization and spatial configuration by linear programming of grey parameters and CLUE-S model in the upper Chaobai River Basin. The results showed that the forestry area and forest eco-service value after the optimal allocation were significantly larger than those in 2008. The fact that increasing rate of forest eco-service value was higher than that of forestry area indicated that the forest eco-service value per unit area was increased and forest structure was improved. With the grasslands or unused lands transforming to forestry or residential and industrial areas,the total value of eco-services was increased mainly in regulation and support services. Driven by economic interests,the development model in the basin brought a great pressure to sustainable development of the capital. Therefore,land degradation and environmental damage should be controlled and improved through resource optimization.