沅水是一条山区河流,航道滩险常有碍航的不良流态,一般指横流、回流、瀑水等。目前对各种流态的治理,基本上处于定性分析阶段。经过沅水航道整治的实践,对横流的治理初步取得了一定的定量分析方法;回流 Yuanshui is a mountain river, waterway often dangerous boat bad flow, generally refers to the cross flow, return, waterfalls and so on. At present, the treatment of various flow regimes is basically in the stage of qualitative analysis. After the practice of the Yuanshui waterway regulation, a certain quantitative analysis method has been initially established for the treatment of cross flow;