最低水位 minimum water level
[水文] lowest water level
- 而东部沿岸,大旱则使长江降到了50年来的最低水位。
And along the east coast, droughts have reduced the Yangtze River to its lowest water levels in fifty years. - 在巴西的其他地方,干旱条件也同样严重。根据法新社最新消息,干旱使得亚马逊河处于47年来的最低水位。
Elsewhere in Brazil, arid conditions have also left the Amazon River at its lowest level in 47 years, according to the Agence France-Press news service. - 护坡覆盖的范围,上游由坝顶护至水库最低水位以下一定距离,一般在最低水位以下2.5米。
Revetments protect the space from dam crest to the line a certain distance, normally 2.5m, under the minimum water level of the dam upstream.