Population that constitutes the civilization

Distance from the coastal site to the open air lake

(suitable pipelines must be built along this distance) Lake surface

Length of the river (i.e. between the lake and the ocean)

Distance between the mouth of the river and the coastal site

Percentage of African desert area involved

@ 5 million

>100 km

>100 km²

>200 km

>100 km

<0.1%