摘要
为了探究不同外包滤料条件下的暗管排水性能和土壤脱盐效果,基于室内试验研究成果,在田间设置4种暗管排水系统(各系统中暗管埋深均为80 cm,间距均为20 m),所用外包滤料分别为68 g/m^(2)土工布(L)、砂滤料(S)、68 g/m^(2)土工布+砂滤料(LS)和无外包滤料(W),以当地常规明沟排水(CK)作为对照,通过田间试验分析了春灌过程中各暗管系统的排水性能指标及土壤脱盐效率.结果表明:相比处理W,处理L,S和LS平均排水速率提升了7.44%,12.55%和15.75%,平均流量衰减度降低4.07%;处理S和LS累积排水量提高了5.11%和8.31%(P<0.05).各暗管处理春灌后平均土壤脱盐率均达47%以上,较CK提升显著,其中处理LS效果最优,为50.94%.综上,应优先选择处理LS作为河套灌区暗管排水系统外包滤料布设方案.该研究结果可为河套灌区暗管排盐技术的推广应用提供理论支撑和科学指导.
To explore the drainage performance of subsurface pipes and the effect of soil desalination under different outsourcing filter materials,based on the results of laboratory experiments,four kinds of subsurface drainage systems were set up in the field(the buried depth of the subsurface pipes in each system was 80 cm,and the spacing was 20 m),and the outer filter materials used were 68 g/m^(2) geotextile(L),sand filter material(S),68 g/m^(2) geotextile+sand filter material(LS)and non-outsourcing filter material(W),with the local conventional open ditch drainage(CK)as a control,the drainage performance index and soil desalination efficiency of each subsurface pipe system in the spring irrigation process were analyzed through field experiments.The results show that compared with W treatment,the average drainage rate of L,S and LS treatments increases by 7.44%,12.55%and 15.75%,respectively,and the average flow attenuation is reduced by 4.07%.The cumulative drainage volume of S and LS treatments increases by 5.11%and 8.31%(P<0.05)respectively.The average soil desalination rate after spring irrigation in each subsurface pipe system is above 47%,which is significantly improved compared with CK treatment.Among them,LS treatment has the best effect,which is 50.94%.In summary,LS treatment should be selected first as the outsourcing filter layout plan of the subsurface pipe drainage system in the Hetao irrigation area.The results of this research can provide theoretical support and scientific guidance for the popularization and application of salt drainage technology through subsurafce pipes in Hetao Irrigation District.
作者
王文旭
杨树青
胡玲玲
张万锋
WANG Wenxu;YANG Shuqing;HU Lingling;ZHANG Wanfeng(Water Conservance and Civil Engineering College,Inner Mongolia Agricultural University,Huhhot,Inner Mongolia 010018,China;College of Tourism,Inner Mongolia Normal University,Hohhot,Inner Mongolia 010022,China)
出处
《排灌机械工程学报》
CSCD
北大核心
2023年第4期425-432,共8页
Journal of Drainage and Irrigation Machinery Engineering
基金
内蒙古科技重大专项(zdzx2018059)
北方农牧交错区农田保育与地力提升关键技术研究示范项目(201802065)
国家自然科学基金资助项目(52069023)。
关键词
排水暗管
外包滤料
春灌
脱盐率
排水性能
subsurface drainage pipe
outsourcing filter material
spring irrigation
desalination rate
drainage performance
