The Great Soviet Transformation
In the mid-20th century, Soviet planners targeted the arid Karshi Steppe for a massive agricultural transformation. The goal was to create a new, vast region for cultivating cotton, called "white gold," and other crops. This ambition required a colossal amount of water in a region defined by its scarcity. The initial plan focused on diverting water from the Amu Darya, one of Central Asia's two major rivers. This led to the construction of the Karshi Main Canal, a project of immense scale that began in the 1960s and became operational in 1973.
The engineering was audacious. Because the Karshi Steppe sits at a higher elevation than the river, water had to be lifted vertically. The project involved a series of six powerful pumping stations, known as the Karshi Cascade, to raise the river water a total of 132 meters over a distance of 80 kilometers. This system was designed to move up to 200 cubic meters of water per second, feeding a network of canals that would irrigate over 336,000 hectares of desert land. However, even the mighty Amu Darya could not satisfy the project's thirst. Planners turned to a hidden resource: the vast freshwater aquifer lying beneath the steppe.