河川 かせん工学 こうがく

kasenkōgaku

1. Not river engineering.; Not civil hydroengineering.

1. River engineering; Was river engineering

1. River engineering; In river engineering

1. River engineering; Hydraulic engineering

1. Not river engineering.

1. It's not river engineering.; I'm not a river engineering expert.

1. River engineering; Was river engineering

1. River engineering; Hydraulic engineering

1. Not river engineering.

1. Wasn't river engineering.; Wasn't civil engineering (related to rivers).

1. River engineering, likely.; Probably river engineering.

1. Was not river engineering.; Was not civil engineering (related to rivers).

1. Wasn't river engineering.; Wasn't civil engineering (related to rivers).

1. River engineering, likely.; Probably river engineering.

1. Was not river engineering.; Was not civil hydroengineering.

1. If it were hydraulic engineering; When it's hydraulic engineering

1. If it were hydraulic engineering; Assuming it's hydraulic engineering

1. If/when river engineering…; Regarding river engineering…