底江（越南语：Sông Đáy／瀧底），又名喝江（越南语：Hát giang／喝江）[1]，是越南北部红河的四大支流之一（其余为沱、梂和泸三江），流经河内市、河南省和宁平省，最终在宁平省金山县底江口注入北部湾。
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