维普中文期刊产品整合服务

Effects of rainfall patterns on runoff and soil erosion in field plots

查看全文 作　　者：Mohamad Ayob [1]Mohamadi;Ataollah [1]Kavian 高影响力作者 机构地区：[1]Department of Watershed Management,Sari Agricultural Sciences and Natural Resources University(SANRU),Sari,Mazandaran,Iran高影响力机构 出　　处：《International Soil and Water Conservation Research》索引2015年第3卷第4期,共9页高影响力期刊 摘　　要：Soil erosion processes during a storm are strongly affected by intra-storm variations in rainfall characteristics.Four storm patterns,each with a different rainfall intensity variation were separated.The storm patterns were:(1)increasing rainfall intensity(2)increasing then decreasing intensity(3)decreasing intensity(4)decreasing then increasing intensity.After each erosive rainfall(12 events),Runoff and suspended sediment samples were collected in each plot's tank which is located on hillslopes of the basin of Khamsan.Main storm characteristics and soil losses were plotted and equation of the line of best fit were selected.Analysis of variance(ANOVA)was used to determine response of runoff and soil erosion to storm patterns.Results showed that in lower rainfall intensities a linear function fits the relationship between soil loss and rainfall intensity whereas this function tends to be non-linear at higher intensities.Also a strong non-linear relationship was found between different quartiles of storm and soil loss.Statistical analysis revealed significant differences in total runoff,soil loss and sediment concentration across four storm patterns(P<0.001)but no differences in the runoff coefficient.In particular,storms with increasing rainfall intensity yielded highest quantities of eroded sediments,total runoff and highest sediment concentrations followed by increasing then decreasing,decreasing then increasing and decreasing intensity,respectively. 关 键 词：Storm patterns Soil erosion Rainfall intensity Erosion plot
相关文献

参考文献(32)

引证文献(14)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费