针对广西喀斯特区土壤镉高背景与镉高异常，从空间统计学视角，综合运用3S、空间建模、实验分析等理论技术，通过空间建模在空间区域尺度研究土壤镉分布规律和特征、识别主导因子、界定高风险区、推断可疑来源，并据此为方向建立有人类活动和无人类活动研究对照区，进行实验对比分析，从镉排放、母岩、土壤、风化过程镉的富集揭示喀斯特区土壤镉来源路径和比例、量化人为源和自然源比例以及相互叠加增强或抑制作用。在理论方法上将空间建模和空间信息技术等应用到了区域环境学研究领域，促进了学科交叉；从适用性和易用性改进了地理探测器并开发了地理探测器ArcMap插件；建立了土壤镉污染地理探测建模流程和方法；建立了用地理探测器为土壤镉机理机制研究提供方向和范围后续采样实验分析综合深入研究的创新思路、方法和实例。在实践上为广西土壤镉污染治理提供了范围和工作方向。

The project aimes at high background for Cd and high Cd concentration of the soil in Guangxi karst area.From the perspective of spatial statistics, the distribution regularity and characteristics, leading factors, high risk area and reversible source of Cd concentration will be done by integrating use of 3S technology, spatial modeling and experiment analysis theory through a space modeling in regional scale space. According to before result, a contrast test with human activities and no human activities will be built to find out the source path and the proportion of soil Cd and interactive effects of environmental factors in Guangxi karst area through contrast analysis from the following aspects: the cadmium emission, parent rock, soil, cadmium enrichment in weathering process. In theory, the spatial modeling and spatial information technology will be introduced into regional environment research to promote the discipline crossing ;The geographical detector will be made progress in applicability and easy use and a geographical detector ArcMap plug-in was developed;Modeling process and method also will be found in area of soil Cd pollution; A new way will be established in soil mechanism research that found the direction and extent of researches through geographical detector tool firstly and then using sample experimental analysis to do some work secondly. In practice, the extent and direction about the pollution of soil Cd in Guangxi karst area will be found.