Seite - 622 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 15 Multi-beam topographic survey Relèvement topographique avec le multi-beam Fig. 16 Multi-beam topographic survey after dredging Relèvement topographique avec le multi-beam depuis le dragage From the comparison between two multi – beam surveys, developed just before and just after dredging activity, Client’s Project Manager has been able to check total quantity of the materials actually dredged from the reser- voir and the relevant time needed to dredge. 622