摘要
以室内土槽为平台,采用人工模拟降雨实验探讨了有无大孔隙土槽中土壤含水量、地面径流、壤中流、地下径流及溶质运移的变化。结果表明,相对于无大孔隙土槽,含有大孔隙的土槽中各层土壤含水量增加较快、增幅较大、峰现时刻较早、地面径流量较小、壤中流和地下径流量较大、地面径流中溴离子浓度较低、铵根离子浓度较高、硝酸根离子浓度对比变化较复杂、地下径流中三种离子浓度较高,且变幅较大。
Based on indoor soil tank experiment and the artificial rainfall simulation, the variations of soil moisture, surface runoff, interflow, underflow runoff and solute transport in macropore and nonmacropore soil tank are analyzed. The study shows that compared to non-macropore soil tank, the soil water content in each layer increases faster; the increasing extent is bigger; flow apex appears earlier; the runoff amount of surface is less; the runoff amount of interflow and underflow are bigger in macropore soil tank. The results also indicated that in maeropore soil tank, the concentration of Br-in surface runoff is lower; the concentration NH4 in the surface runoff is higher; and the change of the concentration of NO2- is much more complex; and these three kinds of ion concentrations in underflow runoff are higher and the increasing extends are bigger.
出处
《水电能源科学》
北大核心
2009年第1期32-36,共5页
Water Resources and Power
基金
国家自然科学基金资助项目(50609005)
教育部博士点专项科研基金资助项目(20050294002)
霍英东青年教师基金资助项目(101075)
关键词
土壤大孔隙
产汇流
溶质运移
soil macropore
runoff yield and eoncentration
solute transport
