松辽流域生长季径流系数变化及受降水影响分析
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中图分类号：TV121 文献标识码：A 文章编号：1001-9235（2025）08-0067-09
Changes in Runoff Coefficient in Growing Season and Impact from Precipitation in the Songliao Basin
ZHOUChangming'，LIULyuliu，YINYizhou，SONGQingli'，XU Hongmei （1.HeilongjingClimateCenter，Harbio3，China;2.Ntional ClimateCenter，Cina MeteorologicalAdministration，eiing 100081， China）
Abstract：Forthegioaldifrenceadaalraceofuoffeffents，nthlypreipiationduoffesfom6to 2018 with 0.25°×0. 25∘ resolution were used with trend analysis and correlation analysis to explore spatial-temporal changes in runoff coeficientsinthegrowingseasonfromMaytoSeptemberandtheimpactfromprecipitationintheSongliao Basin.According tothe results， ① Mean Runoffcoeffcientsarebelow O.5，with values intheeasternand southern parts greaterthanthecentraland western. Geographicaly，therunoffcoeficientinLiaohePlainishigherthanthatinSongnenPlainandSanjiangPlain，whiletenoff Coefficientin Changbai Mountain ishigher thanthatin theGreater Khingan Mountains and Lesser Khingan Mountains. ② In terms of areal mean，down-up-down-upperiodicchangeshavebeenseenintheaveragerunoffcoeffcientsinthegrowingseasonandthe monthlycoeffientfromJulytoSeptember.Anincreasingtedencyisetecedinteaveragrunofcoeffcientinthegowingsason andthemonthlycoeficientfromMaytoJuly，butadecreasingtendencyinSeptember，andnosignificant rendchangeinAugust.
Spatialy，theooentinerowngsasoineojangverasinalyceas，hiloeinaoiver Basin mainly decreases. ③ The areal mean of the runoff coefficient goes lowest in June with a value of O.17，but highest in September with a value of O.28 in the growing season. ④ There is a significant correlation between runoff coefficients in the growing season and the precipitation，maximum 5-dayprecipitation，andmoderateraindaysinmostregions.Additionall，the-monthlagimpactof monthlyprecipitationonthemonthlyrunofcoeffcientinthegrowingseasonisdetected.Thefindingsofteresearchcanserveasa fundamentalsupportforestimatingtheavailablewaterresources inthebasinanddetermining thewaterresourcesallocationseme. Keywords： runoff coefficient; precipitation; growing season; Songliao Basin
全球气候变化背景下水循环加强，降水的强度、历时和分布特征均发生了变化[1]。（剩余11128字）
