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用吸管法对黄河小浪底水利枢纽工程温孟滩移民安置区１５５个土壤样品进行了分析。结果表明，该区土壤以壤土居多，约占７５％；在不同的质地类型中，其主导颗粒明显不同，砂土中以砂粒为主，壤土以粗粉粒为主，粘土中细粉粒和粘粒占绝对优势；在所有质地类型中，中粉粒含量都较少，且随质地变化不明显；土壤质地类型对土壤中细粉粒和粘粒总量的依赖性较强；在土壤颗粒分布中，土壤物理性粘粒含量在１０％左右时，土壤颗粒特征发生较大的变化，因此，温孟滩移民安置区土壤改良指标的下限以土壤物理性粘粒含量为１０％时比较适宜。
155 soil samples from the Wenmengtan Resettlement Area of the Yellow River Xiaolangdi Project are analyzed by pipette method. The results show that the soil in the area is dominated by loam, accounting for about 75%. Among the different types of soil, the predominant particles are obviously different. The sand is mainly sand and the loam is mainly coarse grain. Clay particles accounted for the absolute advantage; in all types of texture, medium powder content is less, and with the texture change is not obvious; soil texture types of fine soil and clay in the total dependence on the amount of strong; In the distribution, when the content of soil clay is about 10%, the characteristics of soil particles change greatly. Therefore, the lower limit of soil improvement index in Wenmengtan resettlement area is more appropriate when the physical clay content is 10% .