内水ないすい Noun English jmdict 1 noun (common) (futsuumeishi) inland waters;territorial waters;local run-off
内水氾濫ないすいはんらん Noun English jmdict 1 noun (common) (futsuumeishi) flooding within the confines of a levee (i.e. caused by surface runoff, drainage failure, etc.) See also: 外水氾濫 (がいすいはんらん)