Erosive Rainfall Characteristics on Red Soil Slope Land in Northern Jiangxi Province

MA Liang; ZUO Chang-qing; QIU Guo-yu

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Erosive Rainfall Characteristics on Red Soil Slope Land in Northern Jiangxi Province

- Erosive Rainfall Characteristics on Red Soil Slope Land in Northern Jiangxi Province
- Bulletin of Soiland Water Conservation Vol. 29, Issue 1, Pages: 75-79(2010)
- 作者机构：
  
  1. 北京师范大学资源学院地表过程与资源生态国家重点实验室,北京,100875
  2. 山东省水利科学研究院,山东,济南,250013
  3. 水利部水土保持生态工程技术研究中心,北京,100044
  4. 北京大学深圳研究生院环境与能源学院,广东,深圳,518055
- 作者简介：
- 基金信息：
- DOI：
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- Published：2010
- 稿件说明：
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MA Liang, ZUO Chang-qing, QIU Guo-yu. Erosive Rainfall Characteristics on Red Soil Slope Land in Northern Jiangxi Province[J]. Bulletin of Soiland Water Conservation, 2010, 29(1): 75-79.
DOI：

MA Liang, ZUO Chang-qing, QIU Guo-yu. Erosive Rainfall Characteristics on Red Soil Slope Land in Northern Jiangxi Province[J]. Bulletin of Soiland Water Conservation, 2010, 29(1): 75-79. DOI：

摘要

通过对赣北红壤坡地上为期6a(2001-2006年)的定点观测

研究确定了该区域侵蚀性降雨的雨量及雨强标准分别为11.20mm和0.88mm/h

并建立了降雨侵蚀力因子"R=∑E.I

"的最佳算式;通过降雨侵蚀力的分析计算

该区多年平均侵蚀力为8695.43J.mm/(m

.h)

年内分布上主要集中在夏季;研究中还拟合了该区降雨侵蚀力预报简易算法

结果表明当年降雨总量产生10%的波动时

会导致年降雨侵蚀力总量27%的变化。

Abstract

Erosive rainfall plays an extremely important role in forecasting and evaluating soil erosion by water.Erosive rainfall and rainfall erosivity (R) in Northern Jiangxi Province are studied based on data observed from 2001 to 2006.Results show that the rainfall amount standard and intensity standard of erosive rainfall events are 11.20 mm and 0.88 mm/h

respectively.The best equation for calculating rainfall erosivity factor in Northern Jiangxi is R=∑E.I30.By calculation

the mean annual rainfall erosivity is 8695.43 J.mm/(m2.h)

maximum annual rainfall erosivity is 15140.64J.mm/(m2.h)

and minimum is 5601.10 J.mm/(m2.h).The seasonal distribution of R value is mainly concentrated in summer.Through the simple algorithm of R proposed in the paper

percent change in annual rainfall erosivity is greater than percent change in total precipitation.

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