Seite - 620 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 13 Pontoon and main operation cabin Ponton et cabine principale de travail All DRAGFLOW’s pontoons are designed for an easy transportation either by container or by trucks. The pontoons are built with internal reinforcement structures and divided in different compartments. The pontoons follow a catamaran design with a steel tripod and hoist as main movement system for the submersible dredging pump. The pon- toon is complete with handrails and skids under the floaters with an integrated high capacity fuel tank. The pontoon is equipped with 4 mooring winches driven by individual electric motors, each one with cable length of up to several meters. The entire dredging equipment is easily controlled and operated from the central cabin were the operator manages all necessary controls to drive each component of the dredging system with indicators of work- ing depths, current absorption and bathymetric survey system. 3.2. Parameters monitored during dredging activities During dredging activity, several parameters have been monitored, for both reasons: to be sure that Client’s requirements are always fulfilled, es- pecially which ones related to the environment, and to check dredging productivity which has a direct impact on the total duration of the project es- tablished by the Client’s to 100 natural days. To do that, the Contractor has to know, during dredging activity, where the submersible pump actually is (x,y,z coordinates), which is the actual wa- ter depth where the pump is dredging, in relation with water level in the res- ervoir, and what is the concentration of sediment in the “slurry”. 620