Ancient maps say that Africa, namely the Sahara Desert and the Information of the article does not give an unambiguous answer to the question "who built these dams." But the fact is interesting. If anyone has information - share … in historical times there were territories with deep rivers and many cities. This is also confirmed by water erosion and traces of river channels.
One of the ancient maps:
Desert in Egypt from the plane.
The valley of the dry river.
You can see the following objects in google maps:
First place.
Promotional video:
Second platinum.
Third.
Another one.
Yet…
And further…
The whole northeastern part of Africa is in the deltas of ancient rivers and former lakes! The floodplains are filled during the period of rare rains, or are they really the beds of ancient rivers?
Coordinates of several objects:
Who built them and when? The British, like the old Aswan Dam in 1905?
The main Aswan Dam, 53 m high, was built by the British.
Do you think these dams on dry rivers are monolithic or made of soil, for example, as in Yemen:
Marib Dam, Yemen.
There is also such a riddle:
The dam photo is from Google Maps. Without dams - from Bing service maps. It turns out that dams have appeared in the last few years?
It is possible that torrential downpours also occur in the desert, leading to large powerful streams in them. And these dam-dams reduce the power of streams. And they built them in our time.
Let's move to India:
The dams are located on the southeastern coast of the Indian subcontinent.
The coordinates of the structures are indicated at the bottom of each screen.
The panoramio.com service at one time came across this photo:
It is possible that these low dams were made to raise the level of the river during dry periods. Moreover, for residents living upstream from the dams.
The information in the article does not give an unambiguous answer to the question "who built these dams." But the fact is interesting. If someone has information - share …