Angol
A probability-based method is presented that can be §used to simulate 2-D velocity distribution in §rectangular open channels and to estimate the flow §discharge. The method is based on Chiu s velocity §distribution equation. A technique for estimating a §parameter of 2-D velocity equation has been §developed, by which the 2-D velocity distribution in §rectangular open channels can be simulated by using §one or several velocity samples, or even without §using any velocity data. §The present study also developed an efficient method §of discharge estimation in rivers, which is §applicable regardless of whether flow is steady or §unsteady. It only requires a quick velocity §sampling. The relation between the surface velocity §and the vertical mean velocity has been studied. It §can be used for developing a non-contact method of §discharge measurement.§Under the same framework of analysis, a new slope-§area method has been developed to determine the flow §discharge. It can reduce errors due to the §uncertainties in Manning s n and the energy §coefficient that exist in the widely-used slope-§area method.
