在丘陵沟壑区,沟道纵横,河谷狭窄,坡度陡峻,在这些地方修建水库或塘坝,开挖溢洪道相当困难,只会形成光吃不拉的“闷葫芦”,一遇山洪便导致漫顶垮坝,威胁到库塘的安全。采用生物保护坝面,则是一种费省效宏的防洪措施,它不但能解决库塘泄洪问题或起到拦截泥沙的作用,同时还能增加沟道生物的覆盖度 In the hilly and gully areas of the hilly and gully areas, the vertical and horizontal channels, narrow valleys and steep slopes make it very difficult to construct reservoirs or pond dams in these areas. It is quite difficult to form a spillway and it will only result in a “stuffy gourd” , Threatening the security of the pond. The use of biologically protected dams is a cost-effective flood prevention measure that not only solves the problem of flood discharge in ponds, but also plays a role in intercepting sediment while increasing the coverage of channeling organisms