Prevents sludge and water distribution to disseminate local Control of waste water and sewage river embankments around the original block, it has a drainage system, there is little to no water flow than ever.
Prevent the spread of sediment. Control, waste water and sewage Near the dam, blocking the drainage system has been designed to have a flow of water, no less than the original.
To prevent the spread of the sediment Control of waste water and sewage The original river dam block has a drainage design for the water flow is less than the original.