Oroville Dam, Erosion. 奧羅維爾水壩, 侵蝕作用

An overhead view taken on Wednesday shows the huge swathe of damaged ground (left of the dam in red) which needs to be fixed

California dam cracks were repaired by 'patch and prey' | Daily Mail Online
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Oroville Dam - Wikipedia

奧羅維爾水壩

Erosion - Wikipedia

侵蝕作用（英語：erosion）或水土流失