土壤侵蚀的环境磁学监测方法

依据土壤、沉积物磁性理论,河流或湖泊的悬移物和沉积物记载了其产地的磁信息,根据它们的磁性参数可以追踪其来源及分布范围;根据表土磁性增强现象,可以采用土壤剖面磁性变化方法来判断土壤侵蚀程度;另外,应用“磁性示踪剂”也是研究土壤侵蚀的有效手段。文章就这方面的国内外研究进展情况加以阐述,并对该方法的优缺点及发展前景提出看法。

The Research Methods of Environment Magnetism on Soil Erosion

Soil erosion has made great loss to agricultural production and environment,which has become one of the most austere environmental problems.How to estimate the source of the sand carrying by river,the mode and degree of soil erosion have become difficult questions to be solved.Based on the magnetic theories of sediment and soil,suspending matter and sediments in rivers or lakes record magnetic information of their source areas.The source and distribution of the suspending matter and sediments can be confirmed by their magnetism parameter;Due to the phenomena of magnetic enhancement in surface soil,the magnetic change of soil section can be used to estimate the degree of soil erosion;in addition,"magnetic tracer"is another effective instrument of research soil erosion. The research progress in the field were discussed in the paper and the authors'opinions also be present in the paper.