Study of Plot Soil Erosion Characteristic Under Different Underlying Horizon

SHEN Zhenzhou; LIU Puling; XIE Yongsheng; ZHENG Shiqing; JU Tongjun

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Study of Plot Soil Erosion Characteristic Under Different Underlying Horizon

- Study of Plot Soil Erosion Characteristic Under Different Underlying Horizon
- Bulletin of Soiland Water Conservation Vol. 25, Issue 3, Pages: 6-9(2006)
- 作者机构：
  
  1. 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：
- 基金信息：
- DOI：
  CLC：
- Published：2006
- 稿件说明：
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SHEN Zhenzhou, LIU Puling, XIE Yongsheng, et al. Study of Plot Soil Erosion Characteristic Under Different Underlying Horizon[J]. Bulletin of Soiland Water Conservation, 2006, 25(3): 6-9.
DOI：

SHEN Zhenzhou, LIU Puling, XIE Yongsheng, et al. Study of Plot Soil Erosion Characteristic Under Different Underlying Horizon[J]. Bulletin of Soiland Water Conservation, 2006, 25(3): 6-9. DOI：

摘要

在延安燕沟试验区建立不同下垫面(裸地、荒草地、灌木林地)自然地貌径流小区

在天然降雨条件下

分析2 a来的产流事件的径流量、产沙量、入渗率数据

发现其随次降雨变化呈现规律性变化。在相同雨强条件下

裸地小区的径流量最大

为荒草地的6倍

为灌木地的2.4倍

裸地远大于有林草覆被小区;同时裸地小区的产沙量最大时是灌木地的82倍

是荒草地的150倍

可见林草覆被大大减少了黄土坡地的土壤侵蚀;在各次降雨过程中

灌木地的平均入渗率为90%

荒草地的平均入渗率为85%

而裸露地的平均入渗率为60%且远低于林草覆被黄土坡地。

Abstract

Three original physiognomy plots (besides bare slope

grass slope and shrubby slope) were const ructed in the Yaner watershed. The amounts of the runoff

erosion and seeping rate in different sections in two years were analyzed. The data were found to vary with different rainfall events. Under the same condition

the amount of runoff on bare slope was 6 times greater than that on grass slope

and 2. 4 times greater than shrubby slope

which indicated that bare slope produced more runoff than other two. The amount of erosion on bare slope was 82 times greater than that on shrubby slope

and 150 times greater than that on shrubby slope. This suggest s that grass and shrubby can greatly reduce soil erosion in the Loess Plateau. Seeping rate varies with all the rainfall event s. Gener2 ally speaking

seeping rate on shrubby slope is 90%

grass slope

85%

and bare slope

60%.It is a comparative advantage in melioration of the Loess Plateau to grow grass or shrub.

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