For a flood with an average shape and duration, it takes about 80 h to travel from Eijsden (km 3) to Keizersveer (km 247). Peak discharge seems to have a minor effect on the travel time (Fig. 5c). However, the shape or duration of the flood has a major effect on the travel time. A steep flood wave (short duration) moves relatively slowly, whereas a flat wave (long duration) moves relatively fast. For the wave shapes that were used in this study, travel times were 30 h more for the steep flood wave (short duration) than for the flat flood wave (long duration) (Fig. 6b).
It is important to notice that the exact locations that contribute to peak attenuation vary per flood. Depending on the peak discharge and flood duration, different areas appear to be important. This is also shown in Fig. 7.
