用<sup>137</sup>Cs法研究黄土区耕垦历史不同的坡面土壤侵蚀强度分异

王晓燕; 田均良

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用¹³⁷Cs法研究黄土区耕垦历史不同的坡面土壤侵蚀强度分异

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- 用¹³⁷Cs法研究黄土区耕垦历史不同的坡面土壤侵蚀强度分异
- Characteristics of Soil Erosion Intensity on Cultivated Hillslopes of Different Cultivation Ages in Loess Plateau Determined Using ¹³⁷Cs as a Tracer
- 水土保持通报 2005年24卷第1期页码：1-4
- 作者机构：
  
  1. 长沙理工大学建筑系,湖南,长沙,410076
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
  
  中国科学院知识创新项目(KZX1-06)
- DOI：
  中图分类号：
- 纸质出版：2005
- 稿件说明：
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王晓燕, 田均良. 用¹³⁷Cs法研究黄土区耕垦历史不同的坡面土壤侵蚀强度分异[J]. 水土保持通报, 2005,24(1):1-4.

WANG Xiao-yan, TIAN Jun-liang. Characteristics of Soil Erosion Intensity on Cultivated Hillslopes of Different Cultivation Ages in Loess Plateau Determined Using ¹³⁷Cs as a Tracer[J]. Bulletin of Soiland Water Conservation, 2005, 24(1): 1-4.
王晓燕, 田均良. 用¹³⁷Cs法研究黄土区耕垦历史不同的坡面土壤侵蚀强度分异[J]. 水土保持通报, 2005,24(1):1-4. DOI：

WANG Xiao-yan, TIAN Jun-liang. Characteristics of Soil Erosion Intensity on Cultivated Hillslopes of Different Cultivation Ages in Loess Plateau Determined Using ¹³⁷Cs as a Tracer[J]. Bulletin of Soiland Water Conservation, 2005, 24(1): 1-4. DOI：

摘要

以核素示踪技术为研究手段

以空间序列代替时间序列和以线控面为基本研究方法

在提出坡面平均坡度和坡面核素平均面积浓度计算方法的基础上

研究了黄土丘陵区典型小流域--延安燕沟流域不同开垦历史的农耕地坡面土壤侵蚀强度分异。通过不同开垦历史的坡面侵蚀模数与开垦时间、坡度、坡长的偏相关分析

结果表明

侵蚀模数与开垦时间的相关程度最大

其次是坡度

与坡长的相关性不明显。坡面土壤侵蚀强度随开垦年限的增长呈增加趋势

说明人为破坏植被、不合理开垦导致的人为加速侵蚀是近代黄土高原水土流失的主要原因。

Abstract

Yangou watershed in the Loess Plateau was selected as the study site to determine the characteristics of soil erosion intensity on cultivated hillslopes of different cultivation ages. The radionuclide tracer technique was employed as a new method and a method was developed to calculate average area concentrations of radionuclide and soil erosion intensity of whole hillslopes by using the average gradients of hillslopes and average area concentrations of radionuclide on hillslopes

with a weighting for slope length. The results of partial correlation analyses among soil erosion modulus

cultivation age

slope gradient and slope length show that the correlation coefficient between erosion modulus and cultivation age is high

higher than that between erosion modulus and slope gradient. The relationship between erosion modulus and slope length was not significant. The conclusion is that soil erosion intensity on hillslopes becomes more severe with increasing cultivation age

mainly due to the gradually effect of the destruction of forestland and grassland.

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用137Cs法研究黄土区耕垦历史不同的坡面土壤侵蚀强度分异

Characteristics of Soil Erosion Intensity on Cultivated Hillslopes of Different Cultivation Ages in Loess Plateau Determined Using 137Cs as a Tracer

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摘要

Abstract

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references

用¹³⁷Cs法研究黄土区耕垦历史不同的坡面土壤侵蚀强度分异

Characteristics of Soil Erosion Intensity on Cultivated Hillslopes of Different Cultivation Ages in Loess Plateau Determined Using ¹³⁷Cs as a Tracer