The concept of information entropy together with the principle of maximum entropy to open channel flow is essentially based on some physical consideration of the problem under consideration. This paper is a discussion on Yeganeh and Heidari (2020)'s paper, who proposed a new approach for measuring vertical distribution of streamwise velocity in open channels. The discussers argue that their approach is conceptually incorrect and thus leads to a physically unrealistic situation. In addition, the discussers found some wrong mathematical expressions (which are assumed to be typos) written in the paper, and also point out that the authors did not cite some of the original papers on the topic.

信息熵的概念，以及对明渠流的最大熵原理，基本上是基于对所考虑问题的某种物理考虑。本文是对Yeganeh和Heidari（2020）的论文的讨论，他们提出了一种新的方法来测量明渠中水流速度的垂直分布。讨论者认为，他们的方法在概念上是不正确的，因此会导致物理上不现实的情况。此外，讨论者发现论文中写了一些错误的数学表达式（假定是错别字），并指出作者并未引用该主题的一些原始论文。