1980-2009年闽东南地区降雨侵蚀力的时空分布特征
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国家科技支撑计划项目"强度侵蚀区退化生态系统修复关键技术的研究与集成"(2014BAD15B02);国家重点基础研究发展计划项目"南方红壤区水土流失综合治理范式及调控机理研究"(2007CB407207)


Temporal and Spatial Characteristics of Rainfall Erosivity in Southeast Fujian Province During 1980-2009
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    摘要:

    [目的] 揭示闽东南地区降雨侵蚀力的时空变异特征,为区域水土流失防治及水土保持规划提供依据。[方法] 基于闽东南地区1980-2009年26个雨量站的逐日降雨数据,运用福建省降雨侵蚀力简易算法。[结果] 闽东南地区降雨侵蚀力年内分布集中于5-8月,呈现双峰式分布;降雨侵蚀力年际间变化幅度较大。1982年年降雨侵蚀力(R值)低至253.82(MJ·mm)/(hm2·h),2006年R值高达725.39(MJ·mm)/(hm2·h),极值比为2.86;30 a内的闽东南地区的降雨侵蚀力并未出现明显的突变现象。[结论] 研究区内降雨侵蚀力R值空间分布不均匀,总体上呈现沿海向内陆增加,西南高东北低的趋势。

    Abstract:

    [Objective] Studying the distribution pattern of rainfall erosivity in the southeastern area of Fujian Province to privide basis for soil erosion control and soil and water conservation plan.[Methods] Based on the data from 26 rainfall station in the Southeastern Fujian Province during 1980-2009, simple algorithm for rainfall erosivity was used.[Results] Rainfall erosivity in Southeastern Fujian Province showed a bimodal distribution as it occoured mainly from May to August. Rainfall erosivity varied greatly over years. The highest value was 725.39 (MJ·mm)/(hm2·h) occurred in 2006, while the lowest value was 253.82 (MJ·mm)/(hm2·h) occurred in 1982, with the extreme ratio of 2.86. Rainfall erosivity in Southeast Fujian Province during the past 30 years did not showed abrupt changes.[Conclusion] Rainfall erosivity showed an uneven distribution pattern with increasing trend from coast to inland, and the value was comparatively higher in southwest than that in northeast.

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崔晓燕,查轩,黄少燕.1980-2009年闽东南地区降雨侵蚀力的时空分布特征[J].水土保持通报,2015,35(1):1-4,24

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  • 收稿日期:2014-06-07
  • 最后修改日期:2014-07-16
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  • 在线发布日期: 2016-04-05
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