基于GIS的重要水源地东圳库区土壤侵蚀与景观格局分析

以重要水源地东圳库区的法国SPOT-5影像图和土壤侵蚀强度图为源数据,运用GIS的信息管理、空间数据处理分析功能,以土地利用景观为研究对象,提取景观空间格局特征信息,选取景观格局分析指标,对土地利用景观空间格局进行定量化研究,寻求一定的规律,探讨景观格局和水土流失过程之间的关系以及人类活动对景观格局和生态过程的影响。研究表明：库区景观类型和生态系统分布不均;随着侵蚀级别的增加,多样性指数减小,优势明显,均匀度降低;库区的园地和耕地景观破碎程度较大,是造成水土流失的主要原因。

Analysis of Landscape Pattern on Soil Erosion in Dongzhen Reservoir with GIS

Based on the remote sensing SPOT-5 reflection picture and intensity map of soil erosion of Dongzhen reservoir watershed,this paper applied GIS technology's information management and spatial data disposal or analysis,concerned with studying the region landscape,extracted information of the landscape pattern characteristics,chose indexes of analysis for landscape pattern,made quantitative research and searched into some laws in order to discuss and reveal the relationship between landscape pattern and soil erosion procession,and the influence of human activities to landscape pattern and landscape ecology procession as well.Research shows: reservoir landscape types and ecosystem uneven distribution;Continuing up erosion intensity,diversity index diminishes,landscape dominance becomes evident,uniformity reduces;the higher rate of decay of Dongzhen reservoir garden plot and agricultural land landscape is first cause of soil erosion.