![]() ![]() This exposes the vulnerability of certain planktons and other benthic species.Īdditionally, the disturbance created during dredging affects critical life stages of certain marine life. Increased suspension of sediments reduces light penetration in the water. This have direct consequences to visual predators like birds and other marine predators. It increases the turbidity (clearness) of water in the area. Performance of dredgers, their operators and the company behind them plays an important role on this subject.Ī well experienced company may give you insights and solutions not found in the books.įurthermore, their crew should have the required training and experience just like the crew organization of any vessel. Which is more economical for the duration of the project? How about the traffic in the area? How long will the pipe be if disposal method is via pipeline? If we use barge, how many do we need in proportion to the production rates? Part of dredging is handling the dredged soil and transporting it somewhere.ĭo we need a barge or just lay out a pipeline? Even if it can reach that level, it may not fulfill the task of dredging to 25 meters.īesides, one must consider the freeboard where it’s mounted. Its also important that its suction pipes or grabs can achieve the target depth.Ī Backhoe Dredger may not be able to operate in a depth of more than 20 meters. Its not enough that the dredger can reach the seabed. How deep is the water? Moreover, how shallow is it? The same seagoing dredger may not be able to enter inside rivers, channels and canals. Using large seagoing dredger for huge areas is economical. Long barges in river dredging may be difficult to turn around. The area to be dredged plays an important part in choosing the dredger. It is best to use mechanical dredgers.ĭifferent types of dredgers have different capacity. Trailing Suction Hopper Dredger for debris and rock dredging is inefficient. Taking that into account, dredgers produce maximum output when working with soils within their handling design. Understanding the type of sediment and its density is a huge factor for efficient dredging. Soil or sediment is the material that we have to take out underwater. Recovering them through dredging is a known method.ĭredging also maintains ecosystem by removing trash and debris as well as restores shorelines to their former glory.ĭredging is a very complicated operation involving lots of calculated steps.Ĭhoosing the type of dredger depends on many factors most of which revolves around the construction environment and project details.ĭeciding on the wrong one is costly, gives long delays and damage to the dredger as well. Some construction materials like gravel and sand can be found underwater. Sediments would have creep on top of these precious items due to currents and siltation. Think about the valuable things sunken ships carry with them a long time ago. Corporations usually carry this venture.ĭredging also serves to recover priceless materials which have been blanketed in sediments underwater. Maintenance dredging solves this problem.ĭredgers are used to create trenches for submarine pipelines underwater.Īdditionally, companies use them to “dig holes” for foundational support of structures built on top of water such as bridges and windmills.Īnother reason for dredging is to gather minerals from underwater much like mining does. Natural sedimentation crops up waterways thereby endangering vessels against grounding or touching bottom. Most of the time, the main and most common objective is to deepen certain parts of rivers, harbors, canals or sea.īefore a port or canal is created, the area has to be dredged so huge ships can enter and leave safely. There are many reasons why dredging is carried out. They are placed on top of self propelled barge or barge towed by tugboat to be able to conduct dredging in bodies of water. Examples of these are excavators or cranes with a clam shell bucket. Other dredgers are heavy construction equipment found on land. They have built in power and can move on their own, even sailing from one port to another Some dredgers are purposely built ships for the sole task of dredging. They have various designs depending on their capability, purpose and method of extraction. Dredgers are watercraft that carry out dredging. ![]()
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