Over four thousand miles in length, the Nile River is thought to be the the longest River in the world. Its depth varies between 26 feet to 36 feet; deep enough for most vessels but not deep enough for the large commercial tankers necessary for economically feasible transport for oil, petroleum, and grain. It varies in width from a slender thousand feet to 4.6 mile wide.
Several African countries border on both sides of the Nile. As a result, these countries south of Egypt benefit from the transport of foodstuffs and minor industrial products in amounts these poorer countries can pay. Most are tribal in governance which makes trade and commerce difficult.
The Corinth Canal separates the Peloponnesus from the Mainland of Grcece. The Canal was constructed beginning in 1881 and completed in 1893. It is four miles long, seventy-five feet wide, and twenty-six feet deep. The solid, layered rock sides rises 270 feet high above the waterline. For comparison, the sides rise 27 stories above the water.
In February of 2018, a collapse of rock from one side of the canal occurred after weeks of heavy rainfall. To the author, the collapse was caused by water intrusion behind layers of rock, falling off when a sufficient amount water accumulated behind causing shear,
The”following is multi-frame illustration consisting of a least a hundred images but only few are important to explain this unique sea-level canal without locks.