基于LUCC扰动影响的成都平原土地生态安全维持机理

LUCC and its influence on environment has become research focus at home and abroad, and its research results have been applied in evaluation of land ecological security and land protection,but the maintenance mechanism of land ecological security under the the impact of LUCC has not yet clear and needs to be further.The former results has found that land use have an important impact on the integrity of the main ecological system structure, the stability of transfer of service value and its flow in Chengdu city, but the process and the mutual relationship of the land use and its ecological safety is not clear. Land ecological security and its maintaining mechanism based on strong disturbance and influence from LUCC in Chengdu plain is as the core, this project will accumulate and establish the multi-source data platform of spatiotemporal and continuous of land use change and its influence on ecological safety, through the remote sensing(RS) and GIS, field investigation and the model simulation.The research will deep analyze the relationship between LUCC process, patterns and its ecological security in Chengdu plain, reveal the key elements and process to maintain land ecological security.The influence on land ecological security and its maintenance mechanism in Chengdu plain as result of land use,following the background of rapid urbanization and industrialization is clarified, and the mode and method of the land ecological safety in Chengdu plain is explored. This research will put forward optimization control principle and ways of the land ecological environment in Chengdu plain,provide theoretical basis for maintaining effective land ecological security,assessment system of land ecological security system,and the warning system in Chengdu plain，making the relevant strategies for country.

LUCC及其影响已成为国内外研究的热点，研究成果已应用于土地生态保护，但其影响下的土地生态安全维持机理亟待认识。前期研究表明，土地利用对成都市生态系统结构的完整性、服务价值转移与流向的稳定性产生重要影响，但对生态系统结构的完整性与功能的稳定性响应机制研究有待于深入。本项目拟以LUCC强烈扰动影响的成都平原土地生态安全及其维持机理为核心，构建土地利用及其对生态安全影响的多源数据平台，通过遥感与GIS技术、野外调查和模型模拟，研究LUCC过程、格局对土地生态系统结构-过程-功能的影响与互馈关系，揭示土地生态安全维持的关键性要素和过程，阐明快速城市化和工业化背景下LUCC扰动对成都平原土地生态安全的影响和维持机理，前瞻性的探索维持土地生态安全模式与方法，提出土地生态环境优化调控原理和途径，构建土地生态安全的定量评估体系、预警系统，为有效维持成都平原土地生态安全和国家制定有效应对策略提供理论依据。

项目背景：成都平原快速的城市化和工业化，导致LUCC的显著变化，对土地生态安全产生重大影响，生态环境约束日益明显。LUCC扰动影响下的成都平原土地生态安全维持机理亟待研究。.主要研究内容：成都平原LUCC过程与格局、LUCC扰动的成都平原土地生态安全和土地生态安全维持机理与调控对策。.重要结果：阐明了成都平原地区LUCC与土地生态系统结构-过程-功能的相互关系；揭示了LUCC扰动对土地生态安全影响及维持机理；建立面向区域土地生态安全评估指标体系和方法，综合评估土地生态安全时空变化特征；提出了确保土地利用节约集约化、构建和谐的人地关系、注重发挥多种保障机制的作用、加强土地环保意识的维持成都平原土地生态安全对策。.关键数据：（1）成都平原：较高精度乡镇行政边界矢量数据数据；土地生态安全评价厘定指标、计算数据、评价结果及驱动因子数据；碳密度修正与土地利用碳排放、驱动力数据；因子探测器关键数据；植被覆盖动态监测关键数据与LUCC遥感动态监测数据（30m）；多时相遥感分析数据；气象要素插值与反演数据；土地利用程度、景观多样性指数等；地形地貌数据（DEM、高程、坡度、坡向、地形起伏度）；社会、经济数据（区域开发指数、人为干扰指数、城镇扩展缓冲区等）；生态系统数据计算与反演数据（NPP、NDVI、ESV、生态环境系统弹性、植被类型、土壤类型、碳排放、碳吸收等）。（2）典型区域（山地平原过渡带）：不同地貌土地利用景观指数、ESV系数修正、土地资源开发利用关键数据；野外地物波普与RTK测试、土壤采样与分析、无人机航拍分析和其他野外调查数据。（3）典型区域（成都市）：城市扩展遥感监测与驱动机制数据。.科学意义：揭示LUCC驱动下的土地生态系统结构-过程-功能之间的相互作用关系；理解土地生态系统结构-过程-功能对LUCC扰动的响应与适应机制，有助于阐明LUCC扰动与土地生态安全胁迫机制，为准确认识不同生态系统功能特征提供理论基础和有效维持区域土地生态安全及可持续发展提供科学依据。