兰山湾筏道是一条多级跌坎式筏道,位于湖南省双牌县黄柏洞河口的支流上,全长422米,进出口水位差39.95米,是目前我国林区中最长,水位差最大的一条水筏道。黄柏洞河流域是湖南省的重要林区之一,森林资源丰富,而且大部份是成过熟林。由于黄柏洞河河道条件恶劣,河床比降大,跌坎多,河湾急,岩礁多,常水流量小,所以,很久以来不能流送竹木。虽沿河修了公路,但吸引范围窄,丰富的森林资源不能大量开发。 Lan Shan Bay raft is a multi-level fall canopy raft, located in Shuangpai County, Hunan Province Huangbai Dong estuary tributary of a total length of 422 meters, import and export of water level difference of 39.95 meters, is the longest in China’s forest area, the water level One of the largest difference in water rafts. Huangbai Dong River Basin is one of the important forest areas in Hunan Province, rich in forest resources, and most are over-mature forests. Due to the harsh conditions of the cork cavern river, the river bed is larger than that of the river bed, the hurricane falls, the river bay is urgent, the rock reef is large and the water flow is often small. Therefore, bamboo can not be flowed for a long time. Although the highway was built along the river, the attraction range is narrow and abundant forest resources can not be developed in large quantities.