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福建省长汀县降雨侵蚀力及其与水土流失的关系研究

DOI: 10.13577/j.jnd.2015.0512, PP. 103-111

Keywords: 降雨侵蚀力,水土流失,简易算法,时空分布,长汀县

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Abstract:

降雨是导致水土流失的主要动力,一般采用降雨侵蚀力(用R表示)定量评价降雨对水土流失的影响。R的经典算法精度高,但繁琐复杂且所需资料不易获得,因此如何在保证精度的前提下降低计算的复杂度是建立R值简易算法的关键。以长汀县若干站点近年的降雨观测数据为依据,以经典算法的结果为参照,利用多元回归分析方法,提出了福建省长汀县的R值新简易算法,并运用此算法计算了该县的R指标,然后分析了该指标值在县内的时空分布及其与水土流失的关系。结果表明,所提简易算法的精度明显高于针对该地区的同类研究成果,所得分析结论符合实际情况。

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