The second stretch will be tested with a realistic irregular wave pattern.
Based on discussions in the Erosion Theme group of Polder2C’s and several recent memos by Jentsje van der Meer, there are two basic possibilities.
A: in case of some damage, or a lot of damage, on the first stretch loaded with the regular waves, apply river conditions, increasing the severity:
- lower section: Hm0 = 0.5 m, water level at the crest, Tp = 2.53 (s), average overflow discharge of qov = 60 l/s.
- middle section: Hm0 = 1.0 m, water level at the crest, Tp = 3.58 (s), average overflow discharge of qov = 10 l/s.
- upper section: Hm0 = 1.0 m, water level at the crest, Tp = 3.58 (s), average overflow discharge of qov = 50 l/s.
B: in case of hardly any damage on the first stretch, then start with the more severe river conditions and end with moderate sea conditions:
- lower section: Hm0 = 1.0 m, water level at the crest, Tp = 3.58 (s), average overflow discharge of qov = 10 l/s.
- middle section: Hm0 = 1.0 m, water level at the crest, Tp = 3.58 (s), average overflow discharge of qov = 50 l/s.
- upper section: Hm0 = 2.0 m, water level at the crest, Tp = 5.66 (s), average overflow discharge of qov = 30 l/s.
In all cases, the basic duration of each test is 2 hours. For these tests, the requirement of waiting for 60 seconds every 10 waves to get a drier slope is dropped, as it is envisaged that the slope will get sufficiently dry at least every time the wave overtopping simulator is filled for a large wave.