基于生态服务价值的多目标水源地土地利用结构优化

为探讨首都水源地最佳水土资源优化配置模式,选取北京山区怀柔水库流域为研究对象,基于研究区5期(1990、1995、2000、2005 和2008)卫星遥感影像数据,分析了怀柔水库流域1990~2008年间土地利用时空变化特征,并基于生态服务价值理论、灰参数线性规划理论和CLUE-S模型对怀柔水库流域土地利用进行空间优化配置模式研究.结果表明:现有土地利用结构在优化配置后流域生态系统服务功能价值较2008年增加1795.4万元,增幅5.4%.其中,流域涵养水源功能价值量增加最多,为560.9万元,净化大气的价值增长幅度最大,增长率达到9.3%.研究结果可为该区域水土地资源的可持续利用、开发和管理提供科学依据.

Multi-objective optimization of land use structures for water resources area based on eco-service value

To explore the most appropriate optimal allocation of soil and water resources in the water source of Beijing, Huairou reservoir watershed, located in Beijing mountains area, was selected as study object. Based on five satellite images of the study region(1990、1995、2000、2005and 2008), spatio-temporal evolution of land use from 1990 to 2008 were obtained. Linear programming of grey parameters and CLUE-S model, based on ecosystem services value theory, were applied to optimize the allocation of land use of the watershed. The results showed that the eco-service value after the optimal allocation were significantly larger than those in 2008, increased by 17.954 million yuan at a growth rate of 5.4%. Among them, the value of water conservation had the most change, with an increase of 5.609million yuan. The value of purify atmospheric got the largest growth rate, which reached 9.3%.The results can provide a scientific reference for sustainable utilization, development and management of land and water resources in this region.