Page 221 - 《水资源与水工程学报》2024年第5期
P. 221

!35 "!5 #                         & ' ( ) & * + , -                               Vol.35No.5
               2024 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2024

            DOI:10.11705/j.issn.1672-643X.2024.05.26


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                          Effectofbiocharadditiononwatertransportinredsoils


                            LIUShisi,PEIQingbao,SONGYixin,SUNXiaochu,ZHANGZhenyu
                                      (NanchangInstituteofTechnology,Nanchang330099,China)
                 Abstract:Theeffectsofdifferentbiocharadditionsonwatertransportinredsoilswereinvestigatedbyan
                 indoorsoilcolumnsimulationtest.Fivegroupswithbiochardosageratesof1% (T1),2% (T2),3%
                 (T3),4% (T4),and5% (T5)wereset,alongwithacontrolgroupwithoutbiochar(CK).Theanal
                 ysisfocusedontheeffectsofthesetreatmentsonwetfront(Z),cumulativeinfiltration(I),andsoil
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                 moisturecontent ,andtheperformanceofdifferentinfiltrationmodelswasevaluatedbyfittingtheinfiltra
                 tionprocess.Accordingtothetestresults ,wetfrontmigrationinitiallydecreased,thenstabilized,and
                 subsequentlydeclinedasthebiocharcontentincreased;themaximumwetfrontmigrationwasobservedin
                 T1at44.2cm ,whiletheminimumwasseeninT5at18.1cm.ComparedtotheCKgroup,wetfront
                 migrationdecreasedby23.3% and26.3% inT3andT4,respectively.Cumulativeinfiltrationalsoex
                 hibitedthesamevariationtrendasthewetfrontmigration ,withmaximuminfiltrationinCKat84.3cm
                 andminimuminT5at26.0cm;whilethatforT3andT4weremeasuredat30.4cmand30.1cm,re
                 spectively.SoilwatercontentwashigherintreatmentgroupscomparedtotheCKgroup ,indicatingthat
                 biocharcanimprovesoilwaterretentionperformance.ItwasfoundthattheKostiakovmodelhadthebest
                                                         2
                 fittingeffectwhencomparingtheRRMSEandR resultsofdifferentmodels.Theseresultscanprovide
                 valuableinsightsforeffectivewatermanagementpracticesinhillyredsoilregions.
                 Keywords:redearth;watertransport;biochar;wetfront;cumulativeinfiltration;fittingmodel






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