磁性示踪在土壤侵蚀研究中的应用进展

doi:10.11867/j.issn.1001-8166.2005.07.0751

地球科学进展 ›› 2005, Vol. 20 ›› Issue (7): 751 -756. doi: 10.11867/j.issn.1001-8166.2005.07.0751

磁性示踪在土壤侵蚀研究中的应用进展

张风宝 ¹，杨明义 ²，赵晓光 ³，刘普灵 ²

1.西北农林科技大学资源环境学院，陕西杨凌 712100；
2.[SX(B]中国科学院/水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室，陕西杨凌 712100；
3.西安科技大学地质与环境工程系，陕西西安 710054

收稿日期:2005-01-04 修回日期:2005-03-21 出版日期:2005-07-25
通讯作者: 杨明义（1970-），男，山东莱州人，副研究员，主要从事土壤侵蚀研究新技术、新方法研究. E-mail:ymyzly@163.com
基金资助:
国家自然科学基金项目“¹³⁷Cs和⁷Be复合示踪研究坡耕地侵蚀产沙时空分布特征”（编号：40401032）和“⁷Be示踪土壤侵蚀关键基础性问题的研究”（编号：40071059）；中国科学院“西部之光”项目“核素示踪在黄土高原生态环境建设减沙效益评价中的应用”资助.

THE REVIEW OF USING MAGNETIC TRACER TO STUDY SOIL EROSION

ZHANG Fengbao ¹, YANG Mingyi ², ZHAO Xiaoguang ³, LIU Puling ²

1.College of Resources and Environment, Northwest A&F University, Yangling 712100, China;
2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation,CAS MWR,Yangling 712100,China;
3.Department of Geology and Environmental Engineering, Xi'an University of Science and Technology, Xi’an 710054, China

Received:2005-01-04 Revised:2005-03-21 Online:2005-07-25 Published:2005-07-25

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示踪技术在土壤侵蚀研究中已得到了较广泛的应用，尤其是利用核素示踪（如¹³⁷Cs、⁷Be、²¹⁰Pb和REE示踪）定量研究土壤侵蚀规律和侵蚀机理方面取得了一系列成果。近几年利用磁性示踪研究土壤侵蚀成为示踪技术在土壤侵蚀研究中应用的一种新思路。目前，在利用环境磁性的时空差异性来研究区域内侵蚀泥沙来源，以沉积物磁性作为流域环境变迁指示剂以及利用磁性参数的变化研究土壤侵蚀等方面已取得一些成果，同时也有人提出利用人工磁性示踪剂来研究土壤侵蚀强度的空间分异规律，定量描述侵蚀方式的演变及侵蚀过程的发生、发展规律，并在野外进行了小区试验。但总体上磁性示踪在土壤侵蚀研究中的应用还相对较少。就磁性示踪在土壤侵蚀研究中应用的理论基础以及目前的研究现状作了简要论述，并分析提出了其研究方向和应用前景。

关键词: 磁性示踪, 土壤侵蚀, 磁化率

Tracing techniques have been widely employed in the investigation of soil erosion. Using ¹³⁷Cs, ⁷Be, ²¹⁰Pb, and REE (Rare Earth Element), quantitative information on soil erosion processes and mechanisms have been obtained. Magnetic has also increasingly been tested in recent years. With measured temporal and spatial variability of natural magnetism, sources of mobilized sediments have been assessed using different parameters. Man-made magnetic tracers were also applied in experimental plot to study the temporal and spatial variability of erosion intensities; observe the evolvement of erosion types and erosion processes. Comparatively speaking, the application of magnetic tracers is still limited and under development. This paper tried to explain the basic theory of using the tracers in erosion study; to review the existing research results; and explore its potentials. The trends for future development and questions have to be solved are also discussed.

Key words: Magnetic tracing, Soil erosion, Magnetic susceptibility, studying progress.

中图分类号:

S157

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