Study on water environmental capacity and reductions in tidal river of the Pearl River Delta region — A case study in Tiansha river

Pollution of urban river in The Pearl River Delta is quite serious, and the pollution causes are very complicated. Impacted by the tide, the contaminants of river is difficult to eliminate. In this paper, water environmental capacity in tidal river of the Tiansha river is calculated through a one-dimension unstable water quality model, and the corresponding reduction plan is proposed through monitoring the concentrations of the pollutants, which provides reference for government to implement total amount control of the pollutants.