Author(s): Liao Yipeng; Li Yun; Fan Ziwu
Linked Author(s):
Keywords: Yangtze River delta area; Urban river network; Varied hydrodynamics; Water quality improvement; Water environment capacity
Abstract: Water quality depression in urban rivers appears to be increasing in developing countries, which cause severe aquatic ecosystem stresses. Therefore a set of water quality assessment standard that suit for China’s conditions is desiderated. Due to the limitation of application conditions and complexity of model parameters, current approaches for water environment capacity computation were not widely used. Suzhou urban river networks in the Yangtze River delta area were studied in this manuscript, by analysis of the monitored water quality data sets and mathematical modelling with one-dimensional and twodimensional numerical models. The results of prototype measurements and mathematical modelling show that urban network water environment capacity presents a remarkable positive correlation with hydrodynamic conditions. With the effective management of point and non-point pollution sources, hydrodynamic promotion can effectively reduce concentrations of biochemical oxygen demand and ammonia in the urban river networks. Spatial-temporal distributions of transparency, total suspended solids and other water quality variables for the river networks were well reproduced by the model, and the model was tested well within a 12km study reach in Suzhou rivernetworks. The estimation method of water environment capacity for urban river networks under varied hydrodynamics was proposed in this study.
Year: 2018