摘要
基于江西省具有典型代表性的5个气象站点1956—2015年共60a逐日降雨量资料,研究了各等级侵蚀性降雨和降雨侵蚀力的特征,建立了利用各等级侵蚀性年降雨量估算年降雨侵蚀力的简易算法模型。结果表明:各等级侵蚀性降雨量、降雨日数和降雨侵蚀的时间分布规律不一。年暴雨量、年暴雨量比例、年暴雨日数、年暴雨侵蚀力、年降雨侵蚀力均在时间上呈不同程度的增长趋势,在空间表现为从南到北逐渐上升趋势。各等级侵蚀性年降雨量估算降雨侵蚀力模型的模拟值与精确值具有高度相关性,可用于估算江西地区年降雨侵蚀力。
Daily rainfall data from 5 typical meteorological stations from 1956 to 2015 in Jiangxi Province were used to study the characteristics of erosive rainfall and rainfall erosivity of each rainfall grade.A rainfall erosivity model using annual erosive rainfall of each rainfall grade to estimate annual rainfall erosivity was established.The results showed that the distributions of erosive rainfall,rainfall days,rainfall erosivity of each rainfall grade were different.With time increasing,rainfall of annual rainstorm,proportion of annual rainstorm,annual rainstorm days,annual rainstorm erosivity,and annual rainfall erosivity increased from south to north at different degrees.The simulated annual rainfall erosivity by using annual erosive rainfall of each rainfall grade was highly correlated with the accurate annual rainfall erosivity,and the model could be used to estimate annual rainfall in Jiangxi Province.
作者
何绍浪
何小武
李凤英
郭小君
HE Shaolang;HE Xiaowu;LI Fengying;GUO Xiaojun(College of Land Resources and Environment,Jiangxi Agricultural University,Nanchang 330045,China)
出处
《水土保持研究》
CSCD
北大核心
2018年第2期8-14,共7页
Research of Soil and Water Conservation
基金
国家自然科学基金"南方红壤区急陡坡土壤侵蚀机理研究"(31300594)
中国气象局气候变化专项项目"鄱阳湖流域土壤侵蚀对气候变化的响应研究"(CCSF201320)
关键词
侵蚀性降雨
降雨侵蚀力
土壤侵蚀
降雨等级
江西省
erosive rainfall
rainfall erosivity
soil erosion
rainfall grade
Jiangxi Province
