区域喀斯特LUCC研究的理论、方法与应用--以广西都安瑶族自治县为例

LUCC是很复杂的现象,不能简单地沿袭传统土地利用研究的思路和方法,必须寻求新的综合研究途径,发展新的研究方法．选择广西都安瑶族自治县为例,通过建立都安喀斯特LUCC分类体系,利用变化幅度、变化速度和趋势指数及其数学模型来表征都安喀斯特LUCC的过程、趋势及区域差异,揭示区域LUCC的动力学机制,客观区分LUCC中自然与人文因素作用的份额,分析LUCC所产生的生态环境效应和灾害风险,通过调整土地利用格局,建立生态安全条件下的土地可持续利用模式,寻求区域可持续发展的土地资源高效利用途经．总结出一套研究区域喀斯特土地利用的理论与方法,丰富了LUCC研究的理论体系内容,对区域喀斯特土地持续利用和生态安全研究具有重要指导意义．

Theory, Method and Application of Regional Karst LUCC Study--A case study of Du'an Yao Autonomous County of Guangxi

LUCC very intricate phenomena, is simply incapable of following traditional land use study, thought and method, we need to seek new approach for comprehensive research, and develop new research means. The case of Du'an Yao Autonomous County of Guangxi shows process, direction and regional diversity through Du'an karst LUCC, via establishing the indexes including classification system, the use of change range, change velocity, change trend and their matrix of Du'an karst LUCC, to show dynamics mechanism of regional LUCC, distinguish the quotient of natural and human factors in LUCC objectively, analyze eco-environmental effect and disaster risk analysis produced by LUCC, via regulating land use pattern to erect land sustainable use pattern under the condition of ecological security, seek ways for high-effect use of land resources for regional sustainable development. A set of theory and means for studying regional karst land use has been summed up, which may both enrich theoretic system of LUCC study, and have important practical meaning in regional karst sustainable use and ecological security.