湘江流域典型小区降雨和植被的产流产沙效应

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中图分类号：TV121+.7 文献标识码：A 文章编号：1001-9235（2025）11-0100-08

Effects of Rainfall and Vegetation on Runoff and Sediment Yields in a Typical Plot of Xiangjiang River Basin

JIANGYubo，MOShuhong，JIANGKaixin，KANGZihan tateKeyLaboratoryofEcologicalWaterConservancyinorthwestAridegions，Xi'anUversityofchnoogy，Xia048

China）

Abstract：Inordertoevealthecharacteristicsoftherunoffandsdimentyieldpattesofdiferentvegetationtypesundererosive rainfallinpurplesoil，asedonthedailymeasureddatfroO17toO1atteSoiladWaterConservationExperimentalStationin HengdongCounty，Hunnrove，fourunofplotsereseleted，elarelndforestndgicultualndndasdy usingthecusteralysiso，osiveifallntseeasifdintoedintnfalty：A（withlgfll amount，largeriallintesitandlonguration），B（ithlargerillount，allfallitesityndlogurai）d （withsmallinfallamount，largeinfallitesityndsorturation）codingtoaalsismongteetysfosie rainfall，thetypewiththelowestocurrencefrequencywastypeB.Theinfallamountofthethreetypesofainfalladaeater impactonrunoff volumethanonslopeerosion-inducedsedimentyield.Therainfalltypewiththelargestcumulativerunoff and sediment yieldwastypeB.Thecumulativerunoffandsedimentyieldofthefourlandtypes inascendingorderwasbareland > （20 agricultural land > grassland > forest land.Compared with that by bare land，the runoff and sediment reduction by forest land was higher，being 20.4% and 70.4% ，respectively.Moreover，the runoff and sediment reduction by various vegetation typeswas the highest under type B rainfall. Overall，the sediment reduction was greater than the runoff reduction.

Keywords： purple soil; erosive rainfall; runoff plot; runoff and sediment yield

水土流矢，这个由目然界力量和人类沽动双重作用下产生的现象，已经成为全球性的环境问题，尤其在中国，它的存在更是一个不容忽视的严峻挑战。（剩余9063字）