【摘要】 土地多功能利用是提高土地利用综合效率、协调用地矛盾的有效途径。选择人地关系较活跃的黑河中游为研究区,融合多源数据,采用集对分析、热点分析和空间自相关等方法,对2000-2014年土地多功能利用进行动态评价及空间关系揭示。结果表明:土地利用功能增加了近一倍,以社会功能和经济功能为主;各功能之间表现为协同或互斥关系:社会功能和经济功能、环境功能和文化功能之间均呈正相关关系,但社会功能和环境功能之间呈负相关关系;土地利用各功能均具有明显的空间聚集性特点,多功能利用集中在黑河水系形成的绿洲平原区、区县建成区和南部山区。研究结果对干旱区土地持续利用管理具有重要的借鉴意义。更多还原

【Abstract】 Land use change causes the transformations of land use functions. In recent years,with the deep understanding of land use and its regional environmental effects, changes in land functions have attracted more attention. On the one hand, due to land resource scarcity,understanding multifunction land use, especially its spatial differentiation, plays a significant role in making full use of land. On the other hand, better understanding multifunctional land use can provide scientific evidence for formulating land use policies and fulfilling sustainable land management. Therefore, multifunctional land use is an effective way to increase land use efficiency and mitigate land use contradictions. Historically and nowadays, the scarcity and unbalanced spatial distribution of land resources has been limiting the socio-economic development of the arid northwestern China, thus there is a pressing need to explore changes in multifunctional land use of this region. Here, we analyzed natural and socio-economic datasets from multiple sources, and assessed the spatial and temporal dynamics of multifunctional land use in the middle reach of Heihe River basin from 2000 to 2014, a typical arid area with much intense human-environmental interaction. We built a suite of indices for the assessment of multifunctional land use from the dimensions of land use functions, ecosystem services, and landscape functions. Then we employed the Set Pair Analysis(SPA) to assess the dynamics of multifunctional land use, and the spatial statistics methods(e.g., hotspot analysis, spatial autocorrelation) to reveal spatial patterns. The results show that from 2000 to 2014, land use function has doubled. Social, economic, environmental and cultural functions have increased differently. Overall, social and economic functions have increased more rapidly than environmental and cultural functions. These four functions develop in an unbalanced way.Social function is positively correlated to economic function, because they both reflect human society and economic development. Environmental function is positively correlated to cultural function, which indicates environment has cooperative relation with resources and landscape.The correlation between social and environmental functions is negative and weak, because land use is difficult to satisfy human’s needs while keeping environmental function well. Secondclass functions show the same correlation patterns as the first-class functions. There are three typical areas for multifunctional land use in the study area: the alluvial plain areas, the urban areas, the southern piedmont areas of Qilian Mountains and Longshou Mountains. Alluvial plain areas have abundant water resources, and are mainly composite of wetlands and croplands. The functions of these areas are food supplies and ecological balance regulation.Urban areas mainly provide social, economic and cultural functions. Southern piedmont areas mainly consist of forests and grasslands, and are at high altitudes with suitable hydrothermal condition. Thus, they can better provide functions of resource supplies and ecological regulation. Our research has great implications for sustainable land use in the arid zone.更多还原