HYSON-CELLS

Spillways and riprap wave protection

Flotsam from a cyclone

• The "wave protection" rip rap can be subjected to severe punishment as seen by these trees deposited during a cyclone.
• MPa and thickness of the concrete "cell slab" protection are determined by the size of wave which in turn depends on the reach of open water.
• The toe of the riprap should be well below the lowest water level expected. Hyson Cells is terminated in a cut-off to guard against undermining when the dam is low.
• There must be a drainage layer beneath the "cell slab". The "micro jointed" cell walls play an important role by releasing hydrostatic pressure.