闽江流域土壤湿度及其记忆性的时空特征与趋势分析

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Spatiotemporal Characteristics and Trend Analysis of Soil Moisture and Its Memory Effect in the Minjiang River Basin

YIN Fangxu¹， YOU Jiewen1，23*， ZHANG Yinchi³， WU Jingwen GAO Lu 1，2，3 （20号 （1.InstituteofGographyujianoalUiversityuzhou3517na;2.KeyLboratoryforHuidubroicalEo geographicalProcesesofheistryofEducationFuanalUivesityuzhou517，ina;3.holofaial Sciences，FujianNormalUniversity，Fuzhou 35O117，China）

Abstract：Thisstudyinvestigatedthespatiotemporaldiferentiationcharacteristicsofsoilmoistureanditsmemoryefectnthe MinjiangRiverBasinimingtoprovideasientificbasisforaterresouresmanagement，aswellasfloodpreventionanddisaster reductioinumidregiosBasedonakgridailyscalesoiloisturedataset（o2O22）regresiofitingndutoeaion coeffcientmetodswereplidtostematicallynalethspatialgadint，interaalvaation，sasoaldamics，andory efectsof Soilmoistureinthebasin.SoilmoistureintheMinjiangRiverBasinexibitsasignificantnorthwestsoutheastdecreasing trend，with high-value zones （>0.43m3/m3 ）concentrated in the Wuyi Mountain Forest Ecological Zone and low-value zones （<0.39m3/ m³） distributed along the coastal urbanized plains. Seasonal dynamics reveal a spring peak （0.44m3/m3 ）and a decline to 0.39m3/m3 in autumn.Thememoryefectsofsoilmoistureatdiferentdepthsshowspatialdiferentiationcharacteristics，andthememorytimeof depsoilinthelowerreachesoftheMinjiangRiverislowerthan3Odays.ThesoilmoistureintheMinjiangRiverBasinshows spatiotemporalditiatioemorectsmontatedeptspaceterogeityltingesesguto offactorssuchasprecipitation，temperature，ndvegetationcoverage.Thefindingsenhancetheunderstandingofsoilmoistureand provide implications for flood warning and water resource management in the Minjiang River Basin. Keywords： soil moisture; soil moisture memory;spatiotemporal diferentiation; variation trend; Minjiang River Basin

王壤湿度作为陆地生态系统与大气相互作用的关键变量，在能量和水分循环中发挥着至关重要的作用，其通过影响地表蒸散发、水分再分配及土壤热容量，进一步调控局地、区域乃至全球的气候系统[1-4]。（剩余16558字）