閩江流域土壤濕度及其記憶性的時(shí)空特征與趨勢(shì)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號(hào) （1.InstituteofGographyujianoalUiversityuzhou3517na;2.KeyLboratoryforHuidubroicalEo geographicalProcesesofheistryofEducationFuanalUivesityuzhou517，ina;3.holofaial Sciences，F(xiàn)ujianNormalUniversity，F(xiàn)uzhou 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

王壤濕度作為陸地生態(tài)系統(tǒng)與大氣相互作用的關(guān)鍵變量，在能量和水分循環(huán)中發(fā)揮著至關(guān)重要的作用，其通過影響地表蒸散發(fā)、水分再分配及土壤熱容量，進(jìn)一步調(diào)控局地、區(qū)域乃至全球的氣候系統(tǒng)[1-4]。（剩余16558字）