Gauge IJsselkop (IJssel) — current water level and draft
IJssel · km 878.46
Measurement—cm
Loading...
Gauge IJsselkop (IJssel) is on the IJssel at kilometre 878.46, on the km 867–903 stretch. The OLR is 683 cm and the fairway depth maintained below it (TuOLR) is 250 cm; after deducting 30 cm of safety margin the official rule of thumb comes out at IJsselkop (IJssel) -463. In practice IJsselkop (IJssel) -480 is used here, -17 cm against the official rule. This gauge has one forecast source: the 5-day forecast from Rijkswaterstaat RWsOS (red). Downstream lies Doesburg.
IJsselkop (IJssel)
The water level at gauge IJsselkop does not scale linearly with the available depth on the IJssel; this is also reflected by the fact that the MGD at average low water indicates a greater depth than calculated with IJsselkop -460. This rule of thumb aligns better at extremely low water, but gauge Doesburg, conversely, gives a better indication of the currently available depth on the IJsselkop–Twenthekanaal reach at any water level. It is therefore better suited to determine maximum draft on the Upper IJssel than gauge IJsselkop. MGD + 15 is also often used, since shallows on the Upper IJssel are mainly in the dry corners (inside bends) that can be navigated around, and not so much in crossings/furrows.