喀斯特流域近40年不透水面变化特征及其对地表径流的影响

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关键词喀斯特流域;SCS-CN水文模型;不透水面;地表径流;洪水淹没模拟中图分类号X143；P339 文献标识码A文章编号 0517-6611（2026）02-0183-10doi：10.3969/j.issn.0517-6611.2026.02.033

AbstractObetie]Tprovideaientifuportforotiingteitlsacefdriskmanagementandgculuralseitinat mountainousareas.[MethodThisstudyexaminesatypicalkarstwatershedusingremotesensingdata（1985-O22）andintegratestheSCNhydrologaldelilrgedsatilestalatiotaouce pansionndquantitativelysiulateisetsoeundiundatioxtetovertheastfoecadesResulthso that impervious surface area increased from 3.31km2 to 22.05km2 ，with spatially contiguous growth along the northwest-southeast axis.Surface runoffbidogsioelatioimpeoussceovagingeproouedeassdrtesityal. Flood-proneareasprogessvelyshifedfrolow-lingfrlanddowstreatourbaosinmduperacs，dangeingalural landurbanifrstructure，ndablesos.Coclusiohdydsorstiticaldfoperioussufceietificag mentinkarstregiostocrdateurbandvelopetanditigateubanfloingriss.esefindingsprovdeasientificbasifoial spatial planning and sustainable agricultural development in karst mountainous areas.

KeyWordsKarst watershed;SCS-CNhydrological model;Impervioussurface;Surfacerunoff;lood iundationsimulation

随着全球城市化进程的加速，城市土地利用方式发生了显著变化，不透水面的急剧扩张对水文过程、灾害风险和农业安全生产等产生了深远影响[1-2]。（剩余13916字）