Decades of mismanagement compounded by prolonged drought have pushed Iran to the brink of what experts call water bankruptcy. With reservoirs running on empty and rainfall at a record low, the authorities have begun rationing water supplies in the Iranian capital, Tehran, a city of some 10 million people. President Masud Pezeshkian has warned that the water crisis could lead to the evacuation of parts of Tehran and has gone as far as floating the possibility of moving the capital. Kaveh Madani, director of the Canada-based United Nations University…