水土保持通报2018，Vol.38Issue(2)：27-32,6.DOI:10.13961/j.cnki.stbctb.2018.02.005
海南省东方市60年来降雨量及降雨侵蚀力变化趋势
Trends of Precipitation and Its Erosivity over Last 60 Years in Dongfang City of Hainan Province
摘要
Abstract
[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.关键词
降雨量/侵蚀性降雨量/降雨侵蚀力/趋势系数/变化趋势Key words
precipitation/erosive precipitation/precipitation erosivity/trend coefficient/trend分类
农业科技引用本文复制引用
郭小君,何小武,李凤英,何绍浪..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):27-32,6.基金项目
国家自然科学基金项目“南方红壤区急陡坡土壤侵蚀机理研究”(31300594) （31300594）
中国气象局气候变化专项“鄱阳湖流域土壤侵蚀对气候变化的响应研究”(CCSF201320) （CCSF201320）
