January 1943, under the command of Captain Brouwer, and loaded with 11 000 tons of ammunition, tanks and three aircraft, steamed along the Wild Coast, South Africa. In an attempt to avoid enemy submarines, the Meliskerk hugged the coast. Northeast of Port St Johns, between the mouths of the Umzimvubu and Mzintlava Rivers, she struck a reef and foundered rapidly in 15 m of water.
Salvage attempts recovered 500 tons of cargo but rough seas caused ammunition to explode, disrupting further efforts. The wreck of the Meliskerk is a popular diving site and home to a unique array of marine life.
Why is the Melliskerk visible and Waratah not - if she is there?
The suspended load, on the other hand, is the amount of sediment carried downstream within the water column by the water flow 11. Suspended loads require moving water, as the water flow creates small upward currents (turbulence) that keep the particles above the bed 13. The size of the particles that can be carried as suspended load is dependent on the flow rate11. Larger particles are more likely to fall through the upward currents to the bottom, unless the flow rate increases, increasing the turbulence at the streambed. In addition, suspended sediment will not necessarily remain suspended if the flow rate slows.
Onshore wave and tide turbulence creates conditions as described above with sediment in suspension rather than deposited, whereas further out - say 0.5 miles - the sediment deposits on the ocean floor, no longer supported by bed turbulence.
|Melliskerk - very visible, close to shore.|
|Note site marked on map within zonal sediment|