A research by Dhani Irwanto, 20 February 2016
In Timaeus Section 24e Plato describes that the country of Atlantis was larger than Libya and Asia Minor put together, and was the way to other islands, and from these you might pass to the whole of the opposite continent which encompasses the true ocean.
Plato describes the Atlantis Plain plain was level, surrounded by mountains which descended towards the sea, smooth and even, rectangular and oblong shaped, three thousand stadia (about 555 kilometers) long, two thousand stadia (about 370 kilometers) wide, looked towards the south, sheltered from the north, surrounded by mountains celebrated for their number, size and beauty; and had wealthy villages of country folk, rivers, lakes, and meadows.
There were four kinds of channels: the circular (perimeter) ditch, the inland channels, the transverse passages and the irrigation streams. The perimeter ditch was artificial, 100 feet (about 30 meters) deep, 1 stadium (about 185 meters) wide, 10,000 stadia (about 1,850 kilometers) long, carried round the whole plain, received streams from the mountains, winding around the plain, meeting at the city and let off into the sea. The inland canals were straight, 100 feet (about 30 meters) wide, 100 stadia (about 18.5 kilometers) intervals, let off into the perimeter ditch and as means for transporting wood and products in ships. The transverse passages were cut from one inland canal into another. The irrigation streams tapping from the canals were meant to irrigate the land in the summer (dry season) while in the winter (rainy season) had the benefit of the rains.