Delme Country Germany States Lower Saxony Physical characteristics River mouth Ochtum 53°05′18″N 8°40′18″E﻿ / ﻿53.0882°N 8.6716°E﻿ / 53.0882; 8.6716Coordinates: 53°05′18″N 8°40′18″E﻿ / ﻿53.0882°N 8.6716°E﻿ / 53.0882; 8.6716 Length 46.0 km (28.6 mi) [1] Basin features Progression Ochtum→ Weser→ North Sea Basin size 248 km2 (96 sq mi) [1]