氷河 ひょうが 決壊 けっかい洪水 こうずいだったら
hyōga kokekkaikōzuidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 氷河湖決壊洪水

1. If/when a glacial lake outburst flood occurred.

Tara Conditional