IELTS Writing Dredger Task

The diagram below shows how a dredger can remove mud from the bottom of canals. The table compares features of the canal dredger with those of a coastal dredger.

Summarise the information by selecting and reporting the main features and make comparisons where relevant.

The pictorial representation describes working mechanism of a dredger during the silt removal task from ground level of canals. Also, the comparison of canal and coastal dredger has been shown with the help of tabular data.

To begin with, the graphic shows the implementation of a new dredging technology, in the city of Venice, to remove loose mud from ground level of canals and sea floor. This new invention will enable mud removal without having to remove all water from the canals in the upcoming years. The machinery involves a boat with hydraulic arms, which can help the lowering of cleaning device to the canal floor. The silt removed is carried over to the shuttle boat via a tube. The boat with the loaded mud is towed out of the city for dumping.

Statistically, the hull length of a coastal dredger is almost four times than that of a canal dredger which is just of 22 meters whereas its hull breadth is about double the size of a coastal one. Moreover, as per requirement, the depth of a coastal dredger is 35 meters in comparison to just 1.87 meters in case of the one needed for canal.

The dredging by means of a canal dredger is almost similar to the process done by a coastal dredger. But the only difference is that the scale of all the parts involved is of lower level.

Bands : 7.0