Simplify the following text for a Grade 9 native English-speaking person.
Original: The Suru valley is a valley in the Ladakh region of Jammu and Kashmir , which is drained by the Suru River ( Indus ) , a powerful tributary of the Indus river .
Simplified: The Suru valley is a valley in the Ladakh region of Jammu and Kashmir , which is drained by the Suru River ( Indus ) , a tributary of the Indus River .