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| 长江上游水蚀区降雨侵蚀力的时空分布特征 | |
| 引用本文： | 王爱娟,李智广,刘峰.长江上游水蚀区降雨侵蚀力的时空分布特征[J].水土保持通报,2013,33(1):8-11. |
| 作者姓名： | 王爱娟 李智广 刘峰 |
| 作者单位： | 1. 长江科学院水土保持研究所,湖北武汉,430010 2. 水利部水土保持监测中心,北京,100055 3. 北京师范大学地理与遥感科学学院,北京,100875 |
| 基金项目： | 第一次全国水利普查项目“国务院第一次全国水利普查”(国发[2010]4号);国家自然科学基金项目“紫色土细沟侵蚀研究”(41101260);长江科学院基本科研业务费项目“长江上游水蚀区土壤侵蚀空间分异规律研究”(CKSF2012042/TB) |
| 摘 要： | 降雨侵蚀力的时空分布特征对于分析和认识土壤侵蚀规律十分重要.根据长江上游7个省市的704个站点1981-2010年30 a的逐日降雨量资料计算了多年平均降雨侵蚀力R值,多年平均半月降雨侵蚀力及其占年降雨侵蚀力的比例,并分析了长江上游水蚀区降雨侵蚀力的空间分布规律.结果表明,长江上游水蚀区的降雨侵蚀力R值范围为273～11 394MJ·mm/(hm2·h· a);受地形的影响R值的空间分布有3个高值区,位于四川省峨眉山市、贵州省毕节地区和湖北省宜昌市附近；建立了多年平均降雨量和降雨侵蚀力R值的关系,相关系数R2达到0.80;研究区降雨侵蚀力的年内分布集中度较大,均值为69％,主要集中在5-10月. |
| 关 键 词： | 降雨侵蚀力 长江上游 时空分布 |
| 收稿时间： | 3/9/2012 12:00:00 AM |
| 修稿时间： | 4/9/2012 12:00:00 AM |
Spatiotemporal Distribution of Rainfall Erosivity for Water Erosion District in Upper Reaches of Yangtze River |
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| WANG Ai-juan,LI Zhi-guang and LIU Feng.Spatiotemporal Distribution of Rainfall Erosivity for Water Erosion District in Upper Reaches of Yangtze River[J].Bulletin of Soil and Water Conservation,2013,33(1):8-11. | |
| Authors: | WANG Ai-juan LI Zhi-guang and LIU Feng |
| Institution: | 1.Yangtze River Scientific Research Institute,Wuhan,Hubei 430010,China;2.The Monitoring Center of Soil and Water Conservation,MWR,Beijing 100053,China;3.School of Geography,Beijing Normal University,Beijing 100875,China) |
| Abstract: | Spatiotemporal characteristics of rainfall erosivity are very important for the understandings of soilerosion processes.Daily rainfall data from 704weather stations of seven provinces in the upper reaches of theYangtze River in past 30years(1980-2010)were used to calculate the average annual rainfall erosivity,average annual half-month rainfall erosivity and the proportion of the annual rainfall erosivity,so as to determine the spatiotemporal distribution of erosive rainfall.Results showed that the highest Rvalue was found tobe 11 394MJ·mm/(hm2·h·a)and the lowest,273MJ·mm/(hm2·h·a).As influenced by terrain,rainfall erosivity presented three high value areas of the Emei Mountains in Sichuan Province,Bijie region inGuizhou Province and Yichang City in Hubei Province.There was a significant correlation between rainfallerosivity and average annual rainfall,with a correlation coefficient R2 of 0.80.In the study area,the seasonaldistribution of rainfall erosivity had a concentration percentage of 69% and was mainly concentrated fromMay to October. |
| Keywords: | rainfall erosivity the upper reaches of the Yangtze River spatiotemporal distribution |
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