土壤均质性的测量及评价方法

THE MEASUREMENT AND ASSESSMENT OF SOIL HOMOGENEITY

提出一种测量土壤均质性的方法：测量土壤剖面上间隔一定距离的相同碳钢电极电位值，用相邻两电极的最大电位差ΔＥ（Ｆｅ）作为评价土壤均质性的参数指标．根据在塔里木地区土壤腐蚀调查的数据相关性和参数散布图的分析表明，ΔＥ（Ｆｅ）参数和土壤常规理化参数之间很少相关，但对土壤腐蚀性分类十分重要，和土壤腐蚀性大小正相关．用它作关键参数可提高建立土壤腐蚀模型的成功率．轮库线沿线土壤腐蚀模型的实例证实了这个结论．

A method of measuring and assessing the soil homogeneity was proposed to replace the method of Standard DIN 50929. The index of homogeneity,ΔE(Fe) was defined as the maximum, difference of potentials between two adjacent electrodes, which were inserted in soils being studied. The method was used in corrosion investigation in TaLim Area and the data were treated by correlative analyses. It was indicated that the ΔE(Fe) had no correlation with other soil corrosion factors, but had important contribution to soil corrosivity. It will be beneficial to choose ΔE(Fe) as a key parameter in study of corrosion modeling. This conclusion was confirmed by practice in soil corrosion researches on Lun Ku Pipelines.