Development of an empirical equation for the transverse dispersion coefficient in natural streams |
| |
Authors: | Tae Myoung Jeon Kyong Oh Baek Il Won Seo |
| |
Affiliation: | (1) Daelim Technology Research Institute, Daelim Industrial Co., Ltd., Seoul, Korea;(2) Center for Metropolitan Policy, Gyeonggi Research Institute, 179 Pajang-dong, Jangan-gu, Suwon, Gyeonggi, Korea;(3) School of Civil, Urban, Geosystem Engineering, Seoul National University, Seoul, Korea |
| |
Abstract: | In this study, a new empirical equation for the transverse dispersion coefficient has been developed based on the hydraulic and geometric parameters in natural streams using a regression technique. First, a total of 32 data sets in 16 streams were collected. Among those sets, 16 sets were used for deriving the new equation, and the other 16 sets were used for verifying the equation. Then, through dimensional analysis, it was found that the normalized transverse dispersion coefficient is associated with several parameters such as sinuosity, aspect ratio, and a friction term. The robust least square method was applied to estimate regression coefficients. The newly proposed equation was proven to be superior in explaining the dispersion characteristics of natural streams more precisely compared to the existing equations. |
| |
Keywords: | Transverse dispersion coefficient Natural stream Sinuosity Aspect ratio Friction term Robust least square method |
本文献已被 SpringerLink 等数据库收录! |
|