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38. Under the action of currents alone, the predicted scour depth around each leg of a 2.5m maximum diameter tripod or jacket obtained using the methods presented by Harris et al (2010) is 3.25m and by the earlier solution offered by Raaijmakers and Rudolph (2008), the corresponding figure is 3.75m.
39. Under the action of waves and currents combined at the 1-year return period, the corresponding scour depths around each leg are 1.77m (Harris et al. 2010) and 2.36m (Raaijmakers and Rudolph 2008). At a return period of 50-years, the respective values are 1.98m and 2.70m.