韩城市土地利用变化及其生态服务价值研究

以1998～2008年韩城市土地利用变化调查数据为基础资料,运用土地利用动态度分析了韩城市土地利用的变化动态;参照谢高地等提出的中国陆地生态系统单位价值服务当量,应用Costanza等提出的生态系统服务价值公式,计算并分析了韩城市研究期各年份生态系统服务价值及其变化。结果表明,1998～2008年韩城市林地、建设用地增加显著,耕地、湿地、园地、未利用地减少,牧草地和水域面积变化不大,土地利用结构逐渐优化;1998～2006韩城市生态系统服务价值总体上呈增长趋势,土地利用结构变化对环境具有正效应;生态系统单项服务功能除食物生产和废物处理外,均呈增长态势。

Research on Land Use Change and Its Ecosystem Services Value in Hancheng City

Based on the investigation data of land use change in Hancheng city from 1998 to 2008,the land use changes in Hancheng city was analyzed by using land use dynamics;by referencing to the per unit area China terrestrial ecosystem service value and the formula proposed by Costanza,the ecosystem service values of Nanchang and its changes were calculated and analyzed.The results indicated that,the forestland and construction land in Hancheng city increased significantly from 1998 to 2008,while the area of farmland,wetland,gardens and unutilized land decreased,the area of grassland and waters did not experience obvious changes,the land use structure became gradually optimized;the ecosystem service value in Hancheng city presented an overall increasing trend from 1998 to 2006,the changes of land use structure had an positive impact on environment;in terms of various single ecosystem service functions,all of them showed an increasing tendency except food production and waste disposal.