摘要
为研究黑土区坡地降雨径流和硝态氮流失情况,采用人工模拟降雨试验方法,探讨不同雨强和坡度对黑土区降雨径流和硝态氮运移过程的影响。结果表明坡面产流时间随雨强和坡度增大而提前。不同雨强和坡度条件下坡面径流中硝态氮浓度从开始迅速变小并逐渐稳定,同等条件下雨强较小时,径流中硝态氮浓度偏高,随着坡度和雨强增大,坡面径流总量和径流泥沙量也都呈增大趋势。
In order to research the rainfall runoff and nitrate nitrogen migration in black soil slope region,simulated rainfall experiments isused to analyze the effect of different rainfall intensity and slope of rainfall runoff and soil nitrate nitrogen movement in black soil region.The results show that the runoff time ahead of the rain and slope increases.The nitrate nitrogen concentration in runoff from the beginning of runoff rapidly become smaller and gradually stabilized under the condition of different slopes and rainfall intensity,the smaller rainfall intensity,the higher nitrate nitrogen concentration in runoff.The total amount of runoff and sediment load of the slope also shows a trend of increasing along with the increase of slope gradient and rainfall intensity.
作者
孟岩
郑文生
MENG Yan;ZHENG Wensheng(Heilongjiang Province Hydraulic Research Institute,Harbin 150080,China)
出处
《人民珠江》
2018年第8期25-27,32,共4页
Pearl River
基金
黑龙江省2016年度财政专项(黑土区养分运移对土壤面源污染影响研究)
关键词
黑土区
坡面径流
硝态氮运移
black soil region
slop runoff
nitrate nitrogen migration
