秒立方米

dì yī qī gōng chéng diào shuǐ guī mó zhì shǎo zài liù bǎi miǎo lì fāng mǐ yǐ shàng

第一期工程调水规模至少在六百秒立方米以上。

There should be above 600 cubic metres per second in scale of the first stage project.