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地球科学进展  2012, Vol. 27 Issue (5): 499-509    DOI: 10.11867/j.issn.1001-8166.2012.05.0499
研究论文     
我国西南山区降雨侵蚀力时空变化趋势研究
刘斌涛1,陶和平1,宋春风1,2,郭兵1,2,史展1,2
中国科学院水利部成都山地灾害与环境研究所,四川成都610041;
2. 中国科学院研究生院,北京100049
Temporal and Spatial Variations of Rainfall Erosivity in Southwest China from 1960 to 2009
Liu Bintao1, Tao Heping1, Song Chunfeng1,2, Guo Bing1,2, Shi Zhan1,2
1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu610041, China; 2. Graduate University of the Chinese Academy of Sciences, Beijing100049, China
 全文: PDF(1227 KB)  
摘要:

降雨是我国西南山区土壤侵蚀的主要动力因素,降雨侵蚀力反映了降雨对土壤侵蚀的潜在能力,研究降雨侵蚀力的时空变化趋势对我国西南山区土壤侵蚀的监测、评估、预报和治理具有重要意义。利用1960—2009年129个气象站逐日降雨量资料,计算出西南山区各气象站逐年降雨侵蚀力。采用趋势系数、气候倾向率和克吕格插值等方法对西南山区降雨侵蚀力50年来的时空变化趋势进行了探讨。结果表明:西南山区降雨侵蚀力空间分布特征与年降水量的空间分布特征一致;西南山区西北部的青藏高原区域降雨侵蚀力年际变化明显,变差系数Cv一般高于0.40;西南山区大部地区降雨侵蚀力呈上升趋势,说明由降雨侵蚀力引起的土壤侵蚀风险在增加,但在成都平原附近降雨侵蚀力在明显下降;降雨侵蚀力变化趋势系数随海拔高度升高而不断增加,在海拔2 500 m以上地区尤为明显,西南山区西北部的高海拔地区海拔高度对降雨侵蚀力增加具有放大效应。

关键词: 降雨侵蚀力时空变化趋势系数气候倾向率西南山区    
Abstract:

Rainfall is the main driving force of soil erosion in the southwest China. It shows that rainfall erosivity has the potential ability causing severe soil loss. So, It is of great significance to soil erosion monitoring, assessment, prediction and control by researching on the temporal and spatial variation of rainfall erosivity in southwest China. Based on the daily rainfall amounts of 129 meteorological stations, the rainfall erosivity was calculated in the southwest China. With the method of trend coefficient, climate tendency rate and kriging interpolation, the rainfall erosivity trends were discussed. The result indicated that the spatial distribution of average annual rainfall erosivity is nearly the same as that of average annual precipitation. There is significant temporal difference of rainfall erosivity in the Qinghai-Tibet Plateau of the northwest of the study area, and the Cv value is higher than 0.40. The rainfall erosivity of most of the study area shows increasing trend during the last 50 years which indicates that the potential ability of the soil loss caused by rainfall increases in southwest China. But, the rainfall erosivity shows decreasing in the area of Chengdu Plain. The coefficients of tendency increase with increasing altitude, and it is particularly evident in areas above an altitude of 2 500 m. The higher altitude enlarges the increasing trend of rainfall erosivity.

Key words: Rainfall erosivity    Spatial and temporal variation    Trend coefficient    Climate tendency rate    Southwest China
收稿日期: 2011-11-21 出版日期: 2012-05-10
:  P468.1  
基金资助:

中国科学院西部行动计划项目“西藏高原生态安全屏障监测评估方法与技术研究”(编号:KZCX2-XB3-08);中国科学院知识创新工程重要方向项目“西南山区情势与资源环境安全战略研究”(编号:KZCX2-YW-333)资助.

通讯作者: 刘斌涛(1984-),男,山东德州人,助理研究员,主要从事山地生态环境遥感与数字山地等领域的研究工作.     E-mail: lbt609@163.com
作者简介: 刘斌涛(1984-),男,山东德州人,助理研究员,主要从事山地生态环境遥感与数字山地等领域的研究工作.E-mail:lbt609@163.com
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引用本文:

刘斌涛,陶和平,宋春风,郭兵,史展. 我国西南山区降雨侵蚀力时空变化趋势研究[J]. 地球科学进展, 2012, 27(5): 499-509.

Liu Bintao, Tao Heping, Song Chunfeng, Guo Bing, Shi Zhan. Temporal and Spatial Variations of Rainfall Erosivity in Southwest China from 1960 to 2009. Advances in Earth Science, 2012, 27(5): 499-509.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2012.05.0499        http://www.adearth.ac.cn/CN/Y2012/V27/I5/499

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