Discussion on Papers 7 and 8

DR C. A. FLEMING, Sir William Halcrow & Partners

Dr O'Connor has referred to some work I carried out about five years ago. This involved the numerical modelling of sediment transport processes in and around a cooling water basin for a nuclear power station. A large data collection was initiated in 1974. Beach and hydrographic surveys were carried out over a 6 km length of coastline every three months for two years. This provided a time history of volume changes on the beach. Wave heights were measured by wave rider buoys and wave direction was measured with a DOSO meter and with radar equipment. Measurements of suspended sediment were essential to calibration of the micro-scale sediment transport model. These were obtained in the very difficult sea conditions by lowering a measuring apparatus from a helicopter. Other information obtained included meteorological data, current measurements, bed-form size measurements and sediment sampling.