摘要
以佳芦河流域2012年"7.27"暴雨洪水为例,采用场次暴雨洪水资料,分别统计流域面平均雨量、暴雨中心最大2 h雨量、大于50 mm以上降雨笼罩面积、次洪洪量、次洪输沙量等指标,分析暴雨洪水输沙关系。结果表明:该次暴雨中心雨量和最大2 h雨量最大,面雨量是该地区1971年以来的最大值;与历史洪水相比,相似的降雨量综合因子产生的次洪洪量和次洪沙量具有明显的减少趋势,下垫面削峰作用显著,水土保持成效明显。
Taking the ＂July 27＂ rainstorm and flood in 2012 as an example,this paper calculated indexes including the surface average rainfall,maximum rainfall in 2 hrs of the rainstorm center,covered area bigger than 50 mm rainfall,flood volume and flood sediment load,etc.,and analyzed the relationships among rainstorm,flood and sediment transport by using rainstorm and flood data.The results show that the rainstorm has the maximum rainfall at storm center and in 2 hrs,and the surface rainfall has a maximum value since 1971 in this area;compared with the historical floods,the flood volume and sediment load produced by the similar rainfall factors have obvious decreasing trend,which indicates the underlying surface playing a significant role on peak cutting and the effect of soil and water conservation is evident.
出处
《人民黄河》
CAS
北大核心
2013年第6期23-24,共2页
Yellow River
基金
"十二五"国家科技支撑计划项目(2012BAB02B04)
国家自然科学基金资助项目(41101095)
水利部公益性行业科研专项(200901019)
关键词
暴雨
洪水
泥沙
佳芦河
rainstorm
floods
sediment
Jialu River
