IWRA World Water Congress 2008 Montpellier France
1. Water availability, use and management
Author(s): Sun Xi
Chen Shaojun
College of Hydrology and Water Resources,
Hohai Univ., Nanjing, Jiangsu Province, 210098, PRC
Keyword(s): longitudinal dispersion coefficient, empirical formula, water
quality, Yellow River
Article: PDFAbstractThe paper studies on the method about estimate
the longitudinal dispersion coefficient of the pollutant in the main stream of the lower Yellow River, PRC, from
Xiaolangdi Reservoir in Henan Province to Lijin County in Shandong Province with about a total length of 750km
which has the complicated riverway characteristics and hydrology condition. Making use of the river cross section
velocity distribution measured data and adopting the theories calculation method, the empirical formulas for estimate
the longitudinal dispersion coefficient in the Yellow River are proposed by dimensional analysis and multivariate
regression analysis. The result is able to be applied to establish and use the one-dimension water quality model in the
water quality pre-warning and prediction system in the main stream of the lower Yellow River. Phenomenon is
discovered from the study that the Yellow River longitudinal dispersion coefficient value changed violently and
frequently. Thus, the further studies are necessary.