Page 210 - 《水资源与水工程学报》2022年第1期
P. 210

!33 " ! 1 #                       & ' ( ) & * + , -                               Vol.33No.1
               2022 $ 2 %               JournalofWaterResources&WaterEngineering                 Feb.,2022

            DOI:10.11705/j.issn.1672-643X.2022.01.29


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                 BCDEF:S152.7;TV93   GHIJK:A    GLMF:1672643X(2022)01020609
                 Soilmoisturecontentchangecharacteristicsanddrivingfactorsofmaize

                       farmlandintheYanglouWatershed ,northernAnhuiProvince

                                                                                    2,3
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                             1,2,3
                                                                      4
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                DUMingcheng      ,ZHANGJianyun       ,WANGZhenlong,LIUCuishan ,WANGGuoqing
                  (1.StateKeyLaboratoryofHydraulicEngineeringSimulationandSafety,TianjinUniversity,Tianjin300072,China;
                     2.StateKeyLaboratoryofHydrology-WaterResourcesandHydraulicEngineering,NanjingHydraulicResearch
                   Institute ,Nanjing210029,China;3.YangtzeInstituteforConservationandDevelopment,Nanjing210098,China;
                              4.AnhuiandHuaiheRiverInstituteofHydraulicResearch,Bengbu233000,China)
                 Abstract:Tostudythecharacteristicsofsoilmoisturechangesofyellowfluvoaquicsoilsinthenorthern
                 AnhuiNorthPlainduringdifferentgrowingperiodsofmaize ,theYanglouWatershedwasselectedasthe
                 studyobject ,andcorrelationanalysisofgroundwatertable,thenumberofdayswithoutrainfallinthepre
                 viousperiod ,evaporationfromwatersurfaceandrainfallwasconductedusing0~50cmsoilwatercontent
                 datafrom2010-2018 ,andtherelativecontributionofdifferentdrivingfactorstosoilwatercontentwere
                 calculatedusingboostedregressiontreealgorithm.Theresultsshowedthatthesoilwatercontentde
                 creasedwiththeincreaseofthesoildepththroughoutthemaizegrowingseason.Twotypicalsoillayers
                 couldbeclassifiedaccordingtothecoefficientofvariation ,with0~10cmastheactivelayerand10~50
                 cmasthelessactivelayer.Soilwatercontentshowedasignificantnegativecorrelationwithwatersurface
                 evaporation,groundwatertableandthenumberofdayswithoutrainfallinthepreviousperiod,butasig
                 nificantpositivecorrelationwiththerainfall.Therelativecontributionofthenumberofdayswithoutrain
                 fallinthepreviousperiodtosoilwatercontentwasthelargest ,whichaccountedfor42.6%,followedby
                 thegroundwatertable,whichwas20.9%,andthecropgrowingperiodonlycontributed7.3%,which

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