If you dam a river, you already know that it isn’t easy for the water to flow through the ground, because it isn’t taking that route.
Actually, this (water that passes under the dam) is the main problem after water passing directly through the dam. If the bed of the river is ok to hold a height of 10 m of water, it is probably not to hold 20 or 30 or 70 m of water.
Actually, this (water that passes under the dam) is the main problem after water passing directly through the dam. If the bed of the river is ok to hold a height of 10 m of water, it is probably not to hold 20 or 30 or 70 m of water.