Abstract: The authors clarified the content of land ecological evaluation, and summarized the research status in China and abroad. The land ecological evaluation of Yan Ba village in Jiangjin Chongqing was carried out, based on GIS. According to actual condition of Yan Ba village and Materials availability, the index system is constructed by 4 target layers, 10 index layers and 18 factors. The score of each index layers and target layers were calculated, using GIS raster analysis function, by expert scoring method to determine the weight. The comprehensively ecological evaluation score of each grid unit was finally calculated. As a result, the ecological quality is preferable in the first class and the second class, occupying about 32 percent of the total area of Yan Ba and distributing in the relative flat area in the middle and southeast of Yan Ba village. The ecological quality is moderate in the third class, occupying about 42.87 percent of the total area, which mainly distributes in the flood plain of Jia-Ling River. The others are the fourth class and fifth class, in which the land ecological quality is range, mainly distributing on the hill and geology damage buffering area. The research of land ecological assessment in village scale is an important support for the further implementation of village scale participatory land use planning.

Key words: land ecological, spatial analysis, assessment, ArcGIS, Yan Ba village

摘要： 在梳理土地生态评价的内涵和国内外研究现状的基础上, 以重庆市江津区龙华镇燕坝村为案例, 基于GIS技术, 对燕坝村土地进行了生态评价。根据当地的实际情况和资料的可得性, 构建了由4个目标层、10个指标层和18个因子组成的指标体系。然后, 利用专家打分法确定权重, 并应用GIS的栅格分析功能, 逐一对各个指标层和目标层因子得分进行了计算。最终得到各个栅格单元的生态综合评价得分。结果显示: 燕坝村一等地和二等地生态质量较好, 占总面积32%左右, 主要分布在中部及东南部较平坦的区域; 三等地生态质量适中, 所占比例最大, 为42.87%, 主要分布在嘉陵江河漫滩等地; 其余为四等地和五等地, 生态质量较差, 主要分布在海拔相对较高的丘陵集中区和地质灾害易发点的影响范围内。该生态评价结果可为进一步实施村域参与式土地利用规划提供科学支持。

关键词: 土地生态, 空间分析, 评价, ArcGIS, 燕坝村