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