10 countries in the world without any rivers

Oman is an extremely arid country that is mainly composed of desert and rocky mountains, which means that there are no permanent or year-round rivers there. Like other Arab countries, Oman is reliant on a series of temporary rivers called wadis that only carry water during large rainfalls. To solve this issue, Omani people invented an ancient way of gathering, using, and transporting water called falaj, in which farmers and communities divert water from underground aquifers found in the mountains to towns and crops. To meet the growing water demand, Oman has developed additional modern infrastructure for sourcing and managing freshwater. Furthermore, the country uses large-scale and technologically sophisticated desalination plants to provide additional freshwater supplies.

PC: Wikipedia