Application of a linked model to simulate catchment water quality in complex land-use area

Owing to the recent developments in computer technology and nationally accumulated hydrology, land use, soil characteristics and flow and water quality monitoring data, high-level modelling results are required. However, as most catchments have a mixture of urban and rural areas, it is challenging to apply one effective model. This study applied a hydrological simulation program to a storm water management model for the Jeonju catchment, South Korea, which has complex land-use characteristics, to determine the hydrological cycle of the catchment, analyse the river water quality and examine the structure of discharge pollutants. The linked model includes an analysis of the sewer pipes, which are the main path of hydrology and pollution loads in urban areas, a low-impact development application, a water circulation improvement technique and an initial storm water treatment facility installation project. This linked model will be very useful for guiding future urban water quality policy.