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文章摘要
任浩天,李龙兵,朱丽蓉,叶长青,王鑫瑶.海南岛松涛水库流域降雨侵蚀力时空变化趋势研究[J].海南大学学报编辑部:自然科学版,2018,36(1):.
海南岛松涛水库流域降雨侵蚀力时空变化趋势研究
The Rainfall Erosivity in Songtao Reservoir Basin of Hainan Island
投稿时间:2017-11-10  修订日期:2017-12-11
DOI:10.15886/j.cnki.hdxbzkb.2018.0008
中文关键词: 松涛水库;降雨;侵蚀;时空分布规律;水土流失
英文关键词: rainfall; erosion; the Songtao reservoir; spatial and temporal variation; water and soil erosion
基金项目:海南省科协青年科技英才学术创新计划项目(HAST201629);国家自然科学基金(51569009,51509127);海南省自然科学基金(414192,20164157);海南大学科研启动( kyqd1417);
作者单位E-mail
任浩天 海南大学热带农林学院 2359824935@qq.com 
李龙兵 海南省水文水资源勘测局  
朱丽蓉 海南大学旅游学院  
叶长青 海南大学热带农林学院 78809221@qq.com 
王鑫瑶 海南大学热带农林学院  
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中文摘要:
      在海南松涛水库流域及其周边25个雨量站点1960—2015年的逐日降雨数据的基础上,计算了各站的降雨侵蚀力,同时,采用统计和反距离权重等方法分析了该流域降雨侵蚀力的时空变化趋势,结果表明:多年平均降雨侵蚀力的范围为1.27×104~2.19×104 MJ·mm/(hm2·h),平均值为1.62×104 MJ·mm/(hm2·h),该值与该流域的多年平均降雨量呈极显著相关(相关系数为0.693,P<0.01),其空间分布规律与多年平均降雨量基本一致,即从北到南总体上呈先递增后递减的趋势;降雨侵蚀力随纬度的增加而增加,但随经度的增加而减小;在该流域的春、秋、非汛期,降雨侵蚀力的变化趋势均不显著,没有发生显著性突变,而在年、夏季、冬季及汛期,降雨侵蚀力的变化则很显著,其中,非汛期的降雨侵蚀力呈下降趋势,其余时段均呈上升趋势;该流域多数站点的降雨侵蚀力呈上升趋势,老村、牙阜和阜类的多数时段呈显著上升趋势,这些地区面临水土流失的风险较大;在分析年降雨侵蚀力时发现,1970年发生了显著突变;该流域降雨侵蚀力的变化周期为3.5年,震荡周期为5~16年.
英文摘要:
      Based on the daily rainfall data from 25 rainfall sites (1960-2015) in Songtao Reservoir Basin and surrounding area, the rainfall erosion of each station was calculated, and the statistic and inverse distance weights methods were used to analyze the spatial and temporal variability trend of rainfall erosion. The results showed that the average rainfall erosion force range from 1.27×104 MJ·mm·(hm2·h)-1 to 2.19×104 MJ·mm·(hm2·h)-1, and the average value is 1.62×104 MJ·mm·(hm2·h)-1, which is significantly correlated with the annual average rainfall in the watershed (correlation coefficient 0.693, P<0.01), the spatial distribution law is consistent with the average rainfall for many years, generally, from north to south, it is increased firstly, and then decreased; with the increasing of latitude, the rainfall erosion force increased, with the increasing of longitude, the rainfall erosion force decreased; in spring, autumn, and non flood season, the change trend of rainfall erosion is not significant, there are no significant changes, however, in the year, summer, winter and flood season, the change of rainfall erosion is significant; in the rainy season, the rainfall erosion decreased, while the remaining periods increased; the rainfall erosion in the most sites in the basin are increased, the rainfall erosion in Laocun, Yafu, and Fulei are increased during most period of time significantly; which means the greater risk of soil and water loss. In 1970, the significant mutation was taken place. The variation period of rainfall erosion force in watershed was 3.5a, and the oscillation period was 5-16a.
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