Onderweg naar punt 3 Boezem en Polders Wandeling Delftse Waterwegen

Much of the area of the Delfland Water Board is lower than the sea. We call these areas polders. When it rains, the ditches in the polders catch the water. Every polder has one or more pumping stations (they used to be windmills). These are large pumps that pump the water from the ditches up into a large canal. We call this canal a boezemkanaal. It is always higher than the polders.
The polder canals bring the water to the edges of the Delfland area. There, large pumps are located: boezem pumping stations. They pump the water to the sea or to the river, the Nieuwe Waterweg.

So a pumping station is actually a big pump. Every pumping station has a duckweed fence. This fence keeps out dirt and ducks. So no rubbish gets into the pump. See also the picture of polder pumping stations and storage basin pumping stations.

Fig. On the right, the sea with the waterway on which it discharges. The pumping stations (pumps) return the water from the polders (usually the lowest area), to the storage basin, to the waterway, to the North Sea.

Or watch this film below: How does Delfland's storage basin system work?

https://www.youtube.com/watch?v=U0jw5clf3pM