Eco-Remediation of Branch River in Plain River-Net at Estuary Area

As an important pollution control unit in the downriver of Liaohe river, there are developing river-net in the estuary area with the horizontal radiatiform geomorphology. The surface water system poses the typical plain river-net characteristics. Under the complex hydraulic effect, the industrial wastewater, streamflow and paddy field drainage flow into the main stream of Liaohe river through various grade branch rivers or ditches. These can threat the offshore water quality of Liaodong bay seriously. In this study, a kind of combined technology composed of floating baffling bio-reactor (FBBR), multiple plant floating-bed and denitrify ecological aquatic weed (Aqu-Mat), was researched using scale and field experiments according to the pollution characteristics and spatial structure of the river-net. And then the suitable technological parameters were obtained. The main results can supply an optional method for the eco-remediation of Branch River in Plain River-net at Estuary Area.