improve the stability of the riverbed protecting the riverbed from washing out provide the predetermined number of the coffieient of roughness afforestation .
the development and government of the rierway, it involves the working craft of laying down, the protecting pad on the constant, section.Regarding pave down, the protecting pad, it can use the permanent protecting pad on the river bank, stone netting box is on the maintenance of the environment and water source, it has the effect of controlling water capacity, prevent soil and water from flowing, the protecting and goverment of the ecological environment.
