In a sedimentation tank (length L, width B, depth D) the settling velocity of a particle for a discharge Q, is

• A. <img src="/_files/images/civil-engineering/waste-water-engineering/190-9.166-1.png">
• B. <img src="/_files/images/civil-engineering/waste-water-engineering/190-9.166-2.png">
• C. <img src="/_files/images/civil-engineering/waste-water-engineering/190-9.166-3.png">
• D. <img src="/_files/images/civil-engineering/waste-water-engineering/190-9.166-4.png">