Saudi Arabia is the biggest country in the world without a permanent river.
It has a land area of 830,000 sq.miles (2,149,690 sq.km) of which 95% is desert.
Many parts of the country have not received any rainfall for years. All the Water collected is stored in underground acquifers.
Even though Saudi Arabia does not have any permanent rivers, it has several wadis. Wadis are intermittently or permanent dry river beds.
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Saudi Arabia