How does a river survive crossing an arid region?

A river can survive crossing an arid region by relying on a combination of factors, including the presence of groundwater, which feeds into the river during dry periods. Additionally, the river may be fed by seasonal rains or melting snow from upstream areas, helping to maintain its flow. Vegetation along the riverbanks can also help reduce evaporation and conserve water. Lastly, the river may form pools or temporary wetlands that retain water, supporting aquatic life and ecosystems even in dry conditions.