Background information:
A squeeze weir is a simple weir without movable parts, which is regularly used in ditches and streams. Pushing up the water has several functions. As: - Store water in wet periods to better withstand dry periods.
- Raise the groundwater level in the area. Sometimes up to 400 meters away from the weir, depending on the type of soil and the elevation.
- Slow down the rate of water discharge.
- Regulating the amount of water that is drained. The latter is done through the V-shaped opening.
With a little supernumerary water, a small amount will flow through the weir, while at high water levels, proportionally more water will automatically flow through the weir. At low water levels, no water will flow through the weir. The exact location of the opening is of the utmost importance. The Markenburg pinch weir is supplied with a small pedestrian bridge. This will not be necessary to operate the weir as this type of weir has no moving parts, but it can still help a person to get across the ditch. Think of farmers, forest rangers and people from the water board. Due to its basic design, the bridge is not intended for tourists or commuters.
Architectural details:
Small weirs such as the pinch weir are often built with wooden planks/beams that are connected at the top with a crossbeam. The reinforcement is also present along the opening so that all standing beams form one whole and can thus absorb the water pressure. The bridges including the railing are usually made of galvanized steel. The running surface consists of grid plates on a construction of galvanized steel girders. This prevents puddles from forming that cause corrosion or slipperiness.
Landscape elements in the Weir photos are not included.
