The Acquoyse Meer lake was once a major watercourse that flowed into the river Linge via a sluice in Meerdijk. The Acquoyse Maalsluis, together with two other sluices, allowed water to enter the region between the rivers Lek and Linge. The Meerdijk region was a key area in the water management of the Inundation Line.
Inundation line
Drainage was undertaken in the 19th century partly via windmills, later through a steam-driven pumping station. Water from the river Linge was pushed up by closing the Lingesluis sluice in Asperen. The Acquoyse Maalsluis was one of the three sluices through which water pushed up from the Linge was let into the region between the rivers Lek and Linge. The two other sluices were the Oude Horn pumping station and Culemborgsche Vliet. The dike sluices around Dalem were closed to stop the inundation water from flowing into Merwerde. To improve the distribution of the water, openings were made in the drainage dikes of this watercourse. The aim was to already start implementing these measures 14 days before the enemy’s arrival.