SOIL EROSION STORM RAINFALL STANDARD IN THE LOESS PLATEAU

Zhou Pei-hua; Wang Zhan-li

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SOIL EROSION STORM RAINFALL STANDARD IN THE LOESS PLATEAU

- SOIL EROSION STORM RAINFALL STANDARD IN THE LOESS PLATEAU
- Bulletin of Soiland Water Conservation Vol. 6, Issue 1, Pages: 38-44(1987)
- 作者机构：
  
  中国科学院西北水土保持研究所
- 作者简介：
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- Published：1987
- 稿件说明：
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Zhou Pei-hua, Wang Zhan-li. SOIL EROSION STORM RAINFALL STANDARD IN THE LOESS PLATEAU[J]. Bulletin of Soiland Water Conservation, 1987, 6(1): 38-44.
DOI：

Zhou Pei-hua, Wang Zhan-li. SOIL EROSION STORM RAINFALL STANDARD IN THE LOESS PLATEAU[J]. Bulletin of Soiland Water Conservation, 1987, 6(1): 38-44. DOI：

摘要

暴雨是引起黄土高原土壤侵蚀的一个关键的、起动力作用的因子。黄土高原严重的土壤侵蚀往往是由少数几次暴雨引起

因此

研究黄土高原的暴雨标准

进而制定暴雨分区

对黄土高原水土保持规划工作具有重大意义。黄土高原的暴雨标准

过去虽曾有人拟定过几种

但主要是针对防洪等工作拟定的

从土壤侵蚀的角度考虑的不够

所以不能完全适应水土保持工作的需要。本试验通过人工模拟降雨的方法

拟定了黄土高原针对土壤侵蚀的暴雨标准

即土壤侵蚀暴雨标准。初步确定

能使坡面上开始产生径流的降雨为暴雨

其中又以能使坡面上开始产生细沟侵蚀为标准

划分出普通暴雨及大暴雨。试验在20°无植被覆盖的均一黄土母质小区(面积为5×1.5=7.5平方米)上

用侧喷式人工模拟降雨装置进行。通过对试验结果的统计分析和能量换算

拟定出黄土高原天然降雨的土壤侵蚀暴雨标准(表4)。

Abstract

Storm rainfall is a key and dynamic factor to erode soil in the Loess Plateau. Usually

serious soil erosion on the Loess Plateau is caused by a few storm rainfall.Hence

studying storm rainfall standard and further making

storm rainfall division in the Loess Plateau are of great significance for soil and water conservation planning in the Loess Plateau. Though several storm rainfall standards in the Loess Plateau were made before，it cannot utterly meet the needs of soil ail witer conservation works fully because they mainly paid attention to flood prevention and scarcely to soil erosion.In this paper

we develop the storm rainfall standard in the consideration of roil erosion

that is

soil erosion storm rainfall standard in the Loess Plateau Fby simulated rainfall. Here

storm rainfall is defined as the rainfall because rof which runoff appears on the slopes

and storm rainfall is subdivided into-common storm rainfall which cannot cause rills on the slopes and heavy storm rainfall which can cause rills. Experiments were made on the plot(5 x 1.5 = 7. 5m E ) which unif orm loess parent material

20 degree of slope and no vegetation by lateral sprinkling rainmaker. Based on statistic analysis and energy conversion of experimeritai result

soil erosion storm rainfall standard for the natural rainfall in the Loess Plateau is made (tab

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