They were protected on its west flank by a canal known as the fossa Bastioni, which still exists.

The largest of the drainage channels is also a canal known as the New River Ancholme.

The Curacazo of Guatca followed the course of the canal known as the Huatica river.

Böttcher's canal: Known today as the ductus utriculosaccularis or as the utriculo-saccular duct.

Two further small canals known as Khlong Lot (tube/straw canal) connect the inner and outer moats.

Another canal known as Maqal canal was also dug from the Tigris.

The line to the new station followed the route of a long-disused canal known as "Broad's Dock".

These canals known as contour canals would take longer winding routes, along which the land was a uniform altitude.

It is surrounded by the system of canals known as Kanały mazurskie, with numerous sluices.

The current river flow is actually a man-made canal, known as the Canal of St. Odoric.