【摘要】 应用陆地卫星TM 数据和数字图像处理技术,制出1∶10万假彩色增强图像,通过目视解译制图获得黄河三角洲土地评价单元图。在此基础上进行野外调查,收集资料,室内化验分析,得到土地评价的基础数据。用聚类分析把全区资源分为5个类型;用判别分析验证表明五类间的差异显著,同时,筛选出了土样全盐量、土壤有机质,表土质地、排水、灌溉条件等五项指标,建立了精度较高的土地评价模型;用主成分分析进行了适宜性分析,编绘出黄河三角洲土地资源图。研究表明:目前黄河三角洲地区适宜农、林生产的土地资源279.25万亩,占全区面积的32.8%,农业与林业之间用地矛盾突出;适宜牧业生产的土地资源437.74万亩,约占全区总面积的50%,面积大,但质量差,只适于劣质牧草生长,要发展牧业生产则需要对土地进行改良和投资。另外,盐光板地134万亩,约占总面积的16%,绿色植被覆盖利用这部分土地,对改善生态条件具有良好的作用,应给予重视。更多还原

【Abstract】 Landsat thematic mapper(TM)data and digital image processing techniques wereused to interpretate and map land evaluation units in the Yellow River delta area.Land sur-vey,investigation and chemical analysis were made to obtain basical data of evaluation.The land resources in this area were divided into 5 classes through cluster analysis.Theclasses were tested by discriminant analysis with satisfactory results.Five factors ofevaluation including salt content,organic matter,texture,drainage and irrigation condi-tions were selected to built evaluation models.The classes of land qualities were distin-guished by using principal component analysis.The land resource suitabilities were dis-cussed according to A Framwork For Land Evaluation(FAO).The area suitable to agricul-ture and forestry now is about 2.79 million mu,32.8% of total area.The area suitable to pasture is 4.37 million mu,50% of total,but the quality is poor.To-developanimal husbandry,this kind of land is needed improving.There is 1.34 million mu,about16%,land unsuitable for crops,trees,grasses at present.更多还原