Open AccessNumerical modeling of COD transportation in Guangxi coastal bays: A short communication
Author(s) -
Da Zhu,
B. Chen,
Dexin Dong,
Hanzheng Ya,
Jian Gao,
Y. Wang,
P. Li
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/348/1/012133
Subject(s) - bay , estuary , bathymetry , environmental science , oceanography , hydrology (agriculture) , flood myth , geology , geography , geotechnical engineering , archaeology
A three-dimensional numerical model of Guangxi coastal hydro-dynamical environment was constructed based on ECOMSED to study the COD transport with fine grid based on latest coastline and bathymetry data. The experiment results showed that the trace of COD was mainly affected by the flood and ebb tide in coastal regions; The area in Qinzhou Bay with COD concentration exceeding 1mg/L, 3mg/L and 6mg/L on the 31th day was 60.5km 2 , 14.8km 2 and 3.7km 2 respectively. The corresponding results at Nanliu river estuary was 64.7km 2 , 23.1km 2 and 0 km 2 respectively. The COD-polluted water at the Nanliu river esturay spread more widely but no concentration larger than 6mg/L was found, which could be explained by the different topographic conditions in these two places. The vertical distribution of COD transport was approximately the same as in surface, except that the area exceeding 1mg/L decreased slightly in the middle and bottom layer.