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渭河流域降雨侵蚀力时空变化研究
Authors
柴雪柯
穆兴民
蒋观滔
高鹏
Publication date
1 January 2016
Publisher
Abstract
降雨侵蚀力是反映流域降雨侵蚀能力的重要指标。基于渭河流域及周边地区25站56年的日降雨量,分析了 流域降雨侵蚀力及其时空变化。结果表明:渭河流域降雨侵蚀力与降雨量的空间分布趋势基本一致,由东南向西北 递减,变化范围为1 000~3 600MJ·mm/(hm2·h·a);降雨侵蚀力在年内呈单峰型分布,8月最大,1月最小,但6— 9月占年侵蚀力的70%左右;渭河流域各站降雨侵蚀力年际差异显著;降雨侵蚀力年际变率为0.40~0.54,尤其20 世纪80年代以来随机波动大且表现出一定减小趋势,但整体并无显著增加或减少趋势。</p
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 12/06/2019