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时间:2018-04-16
《沿海新垦区灌水和降雨条件下暗管排水洗盐效果试验研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、中国农村水利水电·2015年第2期99文章编号:1007-2284(2015)02-0099-06沿海新垦区灌水和降雨条件下暗管排水洗盐效果试验研究朱海波1,2,俞双恩1,2,王君3(1.南方地区高效灌排与农业水土环境教育部重点实验室,南京210098;2.河海大学水利水电学院,南京210098;3.安徽省水利水电勘测设计院,合肥230088)摘要:为了探索沿海新垦区土壤快速脱盐的途径,设计了3种间距(10m、15m、20m)和3种埋深(0.6m、0.9m、1.2m)的暗管排水组合处理,在灌水洗盐和降雨洗盐2种方式下,开展了暗管排水效果以及排水含
2、盐量变化规律的试验研究。结果表明:埋深相同,暗管间距越小,排水量占灌(降)水量的比例越大,地下水降落速度也越快;间距相同,暗管埋深越大,排水量占灌(降)水量的比例越大,地下水降落速度也越快;暗管埋深对暗管初始排水的盐度、电导率也有一定的影响,间距相同,暗管埋深越大,初始排水的盐度、电导率也越大。该研究为江苏沿海滩涂新垦区利用暗管排水技术改良盐渍土提供了支撑。关键词:沿海新垦区;暗管排水;洗盐;电导率+中图分类号:S277.42文献标识码:AExperimentalResearchonSoilDesaltingbySubsurfacePipeDra
3、inageinNewReclamationLandofCoastalAreasundertheConditionofIrrigationandRainfall1,2,YUShuan-gen1,2,WANGJun3ZHUHai-bo(1.KeyLaboratoryofEfficientIrrigation-drainageandAgriculturalSoil-waterEnvironmentinSouthChina,MinistryofEducation,HohaiUniversity,Nanjing210098,China;2.Collegeo
4、fWaterConservancyandHydropower,HohaiUniversity,Nanjing210098,China;3.AnhuiSurveyandDesignInstituteofWaterConservancyandHydropower,Hefei230088,China)Abstract:Inordertoexplorethewayofsoilfastdesaltinginnewlyreclaimedlandofcoastalareas,thecombinedpipedrainagetestdesignsthreekind
5、sofspacing(10m,15m,20m)andthreekindsofburieddepth(0.6m,0.9m,1.2m).Underthetwomethodsofirrigationandrainfall,thetestdoesresearchontheeffectofpipedrainageandthechangeofsalinity.Resultsshowthatwhenthedepthisthesame,thesmallerthedistance,thegreaterthedisplacementratioofirrigation
6、water(drop),alsothefasterthedraw-downspeed.Whentheburiedpipespaceisthesame,thedeepertheburieddepth,thegreaterthedisplacementratioofirrigationwa-ter(drop),thefasterthedrawdownspeed.Thedepthoftheburiedpipealsohasadifferentinfluenceontheinitialdrainagesalinityandelectricalconduc
7、tivity.Thedeepertheburiedpipe,thegreatertheinitialdrainagesalinity,andthegreatertheconductivity.TheresearchsupportstheburiedpipedrainageforthetidalflatdevelopmentsofthecoastalareasinJiangsu.Keywords:newlyreclamaimedlandofcoastalareas;subsurfacepipedrainage;salt-leaching;condu
8、ctivity[1-4],有关盐碱土暗管排水方面的研究较多并取得了一些成果[5-10],农田暗管排水主要用于防止涝渍灾害和土壤盐渍化但对
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