Five-year-old had been playing by river in mangrove swamp at time of his disappearance.

他消失时5岁，正在红树林沼泽地里一条河边玩耍。

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The erosion of riverbank and the disappearance of riparian buffering strips are among the concerns in river ecosystem.

河道生态系统中的河岸侵蚀和滨水缓冲带建设备受关注。

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At the time of her disappearance, Ms Dugmore was thought to have gone into the river and searches took place.

BBC: River body is missing York woman Lisette Dugmore

Police investigating the disappearance of a Welsh soldier in Kent say they have narrowed their focus to a road which leads to the River Medway.

BBC: Missing soldier: Search for Josh Thomas focuses on river