栅格数据支持下的耕地适宜性评价研究——以山东省章丘市为例  

Cultivated Land Suitability Evaluation Based on Raster Data:A Case Study on Zhangqiu City of Shandong Province

作　　者：唐秀美[1,2] 陈百明[1] 路庆斌[3] 杨克[1,2] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]中国科学院研究生院,北京100049 [3]中国环境科学研究院,北京100012

出　　处：《资源科学》2009年第12期2164-2171,共8页Resources Science

基　　金：国家科技支撑计划子课题(编号:2008BAB38B02-3);国家自然科学基金:"耕地占用与GDP增长的Decoupling分析"(编号:70673097)

摘　　要：耕地适宜性评价是对影响耕地各种条件的综合评估。本文以山东省章丘市为例,选取了影响章丘市耕地适宜性的各个因子,以层次分析法确定权重,在GIS支持下,以50m×50m栅格为评价单元,采用综合评价法对章丘市的耕地进行了适宜性评价。评价结果表明,章丘市耕地适宜性情况总体良好,多数耕地具有良好的适应性,其中22.07%的耕地和21.40%的耕地为高度适宜和中度适宜,26.88%为低度适宜。也有相当面积的耕地处于勉强宜耕和不适宜耕作的状况,其中勉强宜耕耕地面积占22.35%,不宜耕的耕地面积占5.53%。论文最后对各个适应性耕地的状况进行了分析并提出了相应的利用对策。结果表明,栅格数据对耕地适宜性评价有较好的表现作用。研究成果对合理保护耕地、促进耕地可持续发展有重要的意义。Cultivated land suitability evaluation,a study on estimating factors of influencing cultivated land quality,is of particular importance to investigate the situation of cultivated land.It can also be conducive to identifying protective regions and adjusting the development direction of cultivated land,benefitting protection and utilization of cultivated land.Previous studies primarily focused on using vector data to perform cultivated land suitability evaluation.Raster data in GIS is a kind of high precision data carrier with the ability to represent variations in geographic phenomena and a kind of consecutive data,like representing temperature distributions and elevations.In this paper,the raster data were used in cultivated land suitability evaluation of Zhangqiu City,located in the middle part of Shandong province,a big agricultural city with plain mainly distributed over the northern part and mountainous areas in the south.The land use data used in this work were all from the current land use status of Zhangqiu.The elevation and slope were extracted directly from the DEMs.The raster data of landform and soil maps were obtained by the procedure of rasterization of landform and soil maps.The nutrient maps were derived form the interpolation of soil sampling points with GIS techniques.On the basis of these data sources,cultivated land suitability evaluation of Zhangqiu City was performed.The factors with their respective weights were determined by the analytic hierarchy process（AHP）method to perform an evaluation on cultivated land suitability,finally resulting in a raster data layer of 50 m×50 m resolution.Results showed that,the cultivated land suitability evaluation was generally effective,with suggesting that 22.07%of the evaluated land was highly suitable and distributed over the north region;21.40%was in a moderate grade and distributed over the central north region;26.88%was in a low grade and distributed across the central south region.Also,quite a few cultivated lands were bare lands being not suita

关 键 词：耕地 适宜性 评价 栅格数据 章丘 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]