Relevance and Uses of dredgers and dredger operations.

1. Maritime Dredging
Relevance and Uses

2. Definition
 DREDGING: Excavation operations carried out
partially underwater in shallow seas or fresh water;
gathering bottom sediments for disposal.
 Products used for maintenances of waterways and
replenishing sand on public beaches. Also used for
land reclamation and construction.

3. Capital Dredging
 Done for building new harbours, berths, waterways
or deepening of existing facilities.
 Done with hard materials and high volume works.
 Cutter-suction or Trailing Suction Hopper Dredging.

4. Preparatory Dredging
 Excavation work for
future structures:
 Bridges
 Waterways
 Docks
 Wharves
All connect to foundations.

5. Maintenance Dredging
 Done to deepen
existing waterways to
make them navigable.
 Silt and sediment sand
and mud threaten
waterways; addressed
with Suction Hopper
Dredge.
 Also done to maintain
holding capability of
reservoirs.

6. Land Reclamation Dredging
 Mining of sand, clay
and rock from seabed;
used to construct new
land.
 Material also used for
flood and erosion
control
 Done with Cutter
Suction or Trailing
Suction Hopper
Dredger

7. Relevance of Dredging
 Maintenance of global
shipping routes;
moderating depth and
width therefore
navigability.
 Global expansion for
making new residential
areas: The World &
Palm Jumeirah, Dubai,
UAE.