海水倒灌指的是海水经地表到达陆地；海水入侵，指的是海水经地下到达陆地。海水倒灌，这是我国沿海地区普遍存在且日趋严重的问题。其成因主要取决于地质结构、岩层密度和取水量。
海水倒灌可导致水田土壤严重盐渍化。
The seawater flowing backward can result in serious salinity of paddy soil.
暴雨造成河流溢出，可以防止从海上反冲洗排水河水，但没有说“下沉”超过海水倒灌。
Rain can cause rivers to overflow, as can the backwash from the sea preventing river water from draining, but nothing says "sinking" more than saltwater intrusion.
他提到了自卫队的努力，他们通过直升机用海水倒灌、净化核反应堆以及疏散被毁核反应堆附近的居民。
He noted the forces' attempt to douse the reactors with sea water by helicopter and decontamination and civilian evacuation activities around the damaged plant.
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