<sup>7</sup>Be Distribution in Runoff and Sediment and its Influence Factor

ZHANG Feng-bao; YANG Ming-yi

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⁷Be Distribution in Runoff and Sediment and its Influence Factor

- ⁷Be Distribution in Runoff and Sediment and its Influence Factor
- Bulletin of Soiland Water Conservation Vol. 26, Issue 1, Pages: 20-23(2007)
- 作者机构：
  
  1. 西北农林科技大学资源环境学院,西北农林科技大学资源环境学院, 陕西杨凌,712100
  2. 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
- 作者简介：
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- Published：2007
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ZHANG Feng-bao, YANG Ming-yi. ⁷Be Distribution in Runoff and Sediment and its Influence Factor[J]. Bulletin of Soiland Water Conservation, 2007, 26(1): 20-23.
DOI：

ZHANG Feng-bao, YANG Ming-yi. ⁷Be Distribution in Runoff and Sediment and its Influence Factor[J]. Bulletin of Soiland Water Conservation, 2007, 26(1): 20-23. DOI：

摘要

通过分析次降雨下

来自坡耕地、荒草地、灌木林地径流小区径流、泥沙中

Be含量

发现径流中

Be浓度较小

均值为0.92 Bq/L

但次降雨过程由于受径流量的影响

随径流流失的

Be量较大。坡耕地小区随径流流失

Be占整个小区

Be流失量的11%~33%

对示踪结果影响较大。与地表土壤相比较

侵蚀泥沙中

Be含量较大

尤其是荒草地和灌木林地小区。坡耕地小区侵蚀泥沙颗粒分选性对泥沙中

Be含量影响不明显

它主要受侵蚀类型的影响

面蚀对侵蚀泥沙中

Be含量贡献最大。

Abstract

The 7Be content in runoff and sediment from different runoff plots under single rainfall event was analyzed.The result showed that 7Be concentration in runoff was relatively less than that in sediment and the average value was 0.92 Bq/L.However

the total loss of 7Be from runoff plots was great because much more runoff discharge was lost from runoff plots.It was estimated that 11%～33% of total loss 7Be in the whole cultivated plot ran off with runoff

and this had a great effect on the result of tracing soil erosion.The 7Be content in sediment was more than that in surface soil

especially in the weed and bush plot.At last

it was discovered that the grain size of sediment did not obviously influence the 7Be content in sediment

and surface erosion played an important role in the 7Be content of sediment.

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7Be Distribution in Runoff and Sediment and its Influence Factor

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⁷Be Distribution in Runoff and Sediment and its Influence Factor