re posted from Africa and the World
Saving Lake Chad with Transaqua: An Inter-Basin Water Transfer Project
Dec 6, 2017
The excerpts below are from a speech by Mr. Franco Persio Bocchetto, Foreign Director for Bonifica, S.p.A., Italy, the engineering firm that designed the Transaqua proposal in the1980s. It is an excellent presentation on a transformative infrastructure project to save the shrinking Lake Chad and develop the African continent.
We can be very optimistic, but due to the growth of the population, the long-term measures cannot be other than to think how to transfer large volumes of water from the Congo River Basin to Lake Chad.
Well, water transfer to drying up endorheic lakes is not merely a “nature conservation measure.” Environment and wildlife deserve to be protected—human beings, too. A drying endorheic lake is proof that the water resources in its catchment area are overexploited with respect to incoming run-off. transferring water from adjacent river basins that have surplus water flowing into the sea, is a way of increasing water availability, especially for agriculture, in the context of the increasing population and declining rainfall, and to restore wildlife.
When water is in short supply in a given place, either you bring it there, or people will migrate elsewhere. Near Lake Chad, there is an immense, scarcely populated
river basin, which discharges into the Atlantic Ocean an average of 40,000 cubic meters/second—the equivalent to 1,250 billion m3 /year. That discharge is 200 times the discharge of the Main River [in Germany], or 14 times that of the Rhine at its mouth. How much of this volume could be possibly and safely discharge of the Main River [in Germany], or 14 times that of the Rhine at its mouth. How much of this volume could be possibly and safely diverted into Lake Chad has yet to be studied.
Can we think of a “win-win” project, where all countries involved have their advantages, which is perhaps, one of the basic conditions for developing this project?
Bringing water from the Congo River Basin to the thirsty Chad region and increasing irrigated agriculture, restoring the lake, producing hydropower and improving inter-African transport and commerce, is the vision of this Transaqua Project.
A canal would have to intercept part of the discharge of the right-hand tributaries of the Congo River, and convey them across the watershed between the Congo Basin and the Chari Basin. The diverted flow would reach Lake Chad through one of the Chari tributaries, properly reshaped. A very preliminary estimate gives an amount up to 100 billion m3 /year could be diverted. That this less than 8% of the Congo discharge, ensuring thus the restoration of Lake Chad and irrigation of up to 3 million hectares.
In its fall toward Chad, the diverted flow could be used for hydropower production. Along the canal, a road should be built which would become the backbone of inter-African land transport. The hypothes is that the canal could also be suitable for navigation has been made. Those ideas stemming from the early 1920s, have been studied by Bonifica, and are presently being considered by the Lake Chad Basin Commission as a possible project for the future.
The idea of Bonifica is to transfer about 100 million cubic meters of water per year from the Congo River Basin to the Lake Chad and Sahel district. This is the Congo Basin as you can see in red, which is the alignment more or less of the canal. You cross the watershed and you go into the water catchment area of the River Chari.
What is important to note is that the Transaqua formula is not simply to replenish Lake Chad, but to give access to drinking water, revive agricultural activity, irrigation, fish farming, a navigable waterway, trade, transport, regulate flows, produce electric power, river ports, commerce, and road connections—thus creating an economic development system along the Transaqua waterway