地矿测绘2023,39(1):56~59CN53-1124/TDISSN1007-9394SurveyingandMappingofGeologyandMineralResources关于流域边界细化的探讨*李纯1,尹静2,杨帆1(1.云南省测绘资料档案馆(云南省基础地理信息中心),云南昆明650000;2.云南省国土资源规划设计研究院,云南昆明650000)摘要:文章通过分析已有的流域数据及其存在的问题,探讨了流域边界细化的必要性,提出了在现有流域分区的基础上,采用水文分析方法,借助高分辨率DEM和DOM,参考相关的专题资料和其他行业资料,对流域边界进行精细化的工作思路,可为流域区域性自然资源调查监测提供范围保障。以赤水河流域(云南段)为例,提取并细化了流域边界及其子流域边界,证明了流域边界细化方法的可行性,细化的流域边界综合考虑了流域的自然属性和社会属性,方便了政府的需求和管理,从影像上看,不仅减少了流域边界不合理走向,更符合客观性和现实性。关键词:DEM;流域边界;细化;赤水河流域(云南段)中图分类号:P208文献标识码:A文章编号:1007-9394(2023)01-0056-04DiscussiononWatershedBoundaryRefinementLIChun1,YINJing2,YANGFang1(1.YunnanProvincialArchivesofSurveyingandMapping(YunnanProvincialGeographicCenter),KunmingYunnan650000,China;2.YunnanInstituteofLandResourcesPlanningandDesign,KunmingYunnan650000,China)Abstract:Byanalyzingtheexistingwatershesdataanditsexistingproblems,thepaperdiscussesthenecessityofrefiningthewatershedboundary,andproposesarefinedworkingideaofwatershedboundarydasedontheexistingwatershedzoning,usingthehydrologicalanalysismethod,withthehelpofhigh-resolutionDEMandDOM,andrefer-ringtorelevantthematicdataandotherindustrydata,whichcanprovidescopeguaranteefortheregionalnaturalre-sourcessurveyandmonitoringofthebasin.TakingtheChishuiRiverbasin(Yunnansection)asanexample,thewa-tershedboundaryanditssub-watershedboundaryareextractedandrefined,whichprovesthefeasibilityofthewater-shedboundaryrefinementmethod.Therefinedwatershedboundarytakesintoaccountthenaturalandsocialattributesofthewatershedcomprehensively,whichisconvenientforthegovernment’sneedsandmanagement.Fromtheperspectiveofimage,theunreasonabledirectionoftheboundaryisreduced,whichismoreinlinewiththe...