A comprehensive review on soil erosion using ~7Be measurement

ZHANG Fengbao1 YANG Mingyi2 WANG Guangqian1 1

doi:null

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A comprehensive review on soil erosion using ~7Be measurement

更新时间：2021-03-12

- A comprehensive review on soil erosion using ~7Be measurement
- NUCLEAR TECHNIQUES Vol. 32, Issue 8, (2009)
- 作者机构：
  
  1. 清华大学水沙科学与水利水电工程国家重点实验室
  2. 西北农林科技大学,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
- 作者简介：
- 基金信息：
  
  国家重点基础研究发展规划“973”(007CB407201);水利部公益性行业科研专项(200701008);教育部“新世纪优秀人才”支持计划资助
- DOI：
  CLC： S157.1
- Published：01 August 2009
- 稿件说明：
移动端阅览
[1]张风宝,杨明义,王光谦.~7Be示踪土壤侵蚀研究现状及存在问题探讨[J].核技术,2009,32(08):596-600.

ZHANG Fengbao1 YANG Mingyi2 WANG Guangqian1 1. A comprehensive review on soil erosion using ~7Be measurement[J]. Nuclear techniques, 2009, 32(8): 596-600.
[1]张风宝,杨明义,王光谦.~7Be示踪土壤侵蚀研究现状及存在问题探讨[J].核技术,2009,32(08):596-600. DOI：

ZHANG Fengbao1 YANG Mingyi2 WANG Guangqian1 1. A comprehensive review on soil erosion using ~7Be measurement[J]. Nuclear techniques, 2009, 32(8): 596-600. DOI：

摘要

天然放射性核素7Be具有沉降的连续性、能被土壤颗粒强烈吸附及较短半衰期等特性

近年来逐渐被应用于土壤侵蚀的研究

可示踪短期内和次降雨的土壤侵蚀速率

定量化描述坡面土壤侵蚀空间分布

也可与137Cs、210Pb、226Ra和228Ra等相结合研究土壤侵蚀过程

表征流域土壤侵蚀状况。本文就7Be示踪土壤侵蚀的依据、目前的应用现状及研究中存在的问题加以简述

并探讨了今后研究的主要方向。

Abstract

7Be is a natural cosmogenic radionuclide with a relative short half-life of 53.3 d. It is mainly produced in the upper atmosphere as the product of the spallation of oxygen and nitrogen nuclei by cosmic rays. Through continuously wet and dry deposition

7Be is absorbed strongly by soil particle once it deposits onto the earth’s surface. Therefore

it has been regarded as a valuable tracer to document short-term and individual-event soil erosion in recent years. Moreover

It also can be combined with other radionuclides (such as 137Cs

210Pb

226Ra) to study soil erosion process. This paper reviewed the previous researches results

including the principle of using 7Be measurement to document soil erosion and the conversion models of soil erosion rates from 7Be data. The problems

suggestions and prospects for further application of 7Be measurement were also discussed.

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