Brook head comb dam, in addition to the blocking effect of the slope, with large pores, good drainage, better able to provide places of refuge in small home, taking into account the demand for engineering and ecological conservation.
Tou comb dam, in addition to having the effect of blocking the slope with larger pores, enabling drainage, but also provides a small place of refuge habitat, taking into account engineering requirements and ecological conservation.
Creek head comb dam. In addition to block the slope effect, with larger pores, good drainage, provide small creatures that inhabit places of refuge, while taking into consideration the requirements engineering and ecological conservation.