江西农业大学 国土资源与环境学院,江西,南昌,330045
纸质出版:2018
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郭小君, 何小武, 李凤英, 等. 海南省东方市60年来降雨量及降雨侵蚀力变化趋势[J]. 水土保持通报, 2018,38(2):27-32.
GUO Xiaojun, HE Xiaowu, LI Fengying, et al. Trends of Precipitation and Its Erosivity over Last 60 Years in Dongfang City of Hainan Province[J]. Bulletin of Soiland Water Conservation, 2018, 38(2): 27-32.
郭小君, 何小武, 李凤英, 等. 海南省东方市60年来降雨量及降雨侵蚀力变化趋势[J]. 水土保持通报, 2018,38(2):27-32. DOI: 10.13961/j.cnki.stbctb.2018.02.005.
GUO Xiaojun, HE Xiaowu, LI Fengying, et al. Trends of Precipitation and Its Erosivity over Last 60 Years in Dongfang City of Hainan Province[J]. Bulletin of Soiland Water Conservation, 2018, 38(2): 27-32. DOI: 10.13961/j.cnki.stbctb.2018.02.005.
[目的
]
分析海南省东方市降雨量、侵蚀性降雨量及降雨侵蚀力在不同时间尺度上的趋势变化及其相关性,为该区生态环境建设、水土流失治理及土壤侵蚀机理研究提供科学支持。[方法
]
根据该地区1956-2015年60 a的逐日降雨量数据资料,采用变异系数、趋势系数和气候趋势率分析不同时间尺度的降雨、侵蚀性降雨和降雨侵蚀力的变化趋势。[结果
]
①东方市1956-2015年60 a来年均降雨量、年均侵蚀性降雨量、年均降雨侵蚀力分别为982.9±36.9 mm,816.1±37.6 mm和9 441.7±554.2 MJ·mm/(hm
2
·h·a),变异系数分别为29.1%,35.7%,45.5%。②60 a来降雨量、侵蚀性降雨量及降雨侵蚀力年际变化均呈一定的增加趋势,趋势系数分别为0.129,0.156,0.198。季、月尺度上变化差异较大,但总体变化格局相似,均呈单峰型分布。③降雨量、侵蚀性降雨量及降雨侵蚀力两两之间有极强的线性相关性,且乘幂方程较线性回归方程能更好的反映两两之间的关系。[结论
]
60 a来降雨量、侵蚀性降雨量、降雨侵蚀力均呈现较明显的年际增加趋势,且两两之间呈幂函数关系。
[Objective] The temporal trends of rainfall
erosive rainfall and rainfall erosivity in Dongfang City of Hainan Province from 1956 to 2015 were analyzed to provide scientific support for the study of ecological environment construction
the soil erosion and soil erosion mechanism.[Methods] Based on the daily rainfall data from meteorological stations in Dongfang City from 1956 to 2015
indexes of coefficient of variation
trend coefficient and climate tendency rate were used toanalyze the trends of rainfall
erosive rainfall and rainfall erosivity in different time scales.[Results] ①The average annual rainfall
the average annual erosive rainfall and the average annual rainfall erosivity in Dongfang City were 982.9 mm
816.1 mm and 9 441.7 MJ·mm/(hm2·h·a)
respectively. Their coefficients of variation were 29.1%
35.7% and 45.5%
respectively. ②Over the past 60 years
the annual variations of rainfall
erosive rainfall and rainfall erosivity all showed increase trends
with coefficients of 0.129
0.156
0.198. At seasonal and monthly scales
though big differences existed for all of the three rainfall indicators
the overall pattern of change was similar
that was a unimodal distribution. ③There were a strong linear correlations among rainfall
erosive rainfall and rainfall erosivity
and also power function can reflect their relationships better than the linear one.[Conclusion] Over the past 60 years
rainfall
erosive rainfall and rainfall erosivity all showed obvious inter-annual trends of increase
they can be described well with power function among two of the three variables.
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