Abstract：An integrated model (coupling system dynamics model with water quality model (SD-WQM)) was developed to describe the interactions among social development, economical development, water resource and water quality and apply to a catchment in Shenzhen river. The model was used to analyze the effects of adjustment of industrial structure of GDP and internal structure of secondary industry as well as industrial technology improvement on water resource balance and water quality improvement in the catchment. The adjustment of industrial structure of GDP might relieve water resource shortage but had little influence on water quality improvement. Decreasing the proportion of labor-intensive type in secondary industry, improving technology of labor-intensive type in secondary industry and that in tertiary industry had significant effect on water resource balance and water quality improvement. A comprehensive adjustment based on the results of sensitivity analysis was proposed and testified by SD-WQM simulation to satisfy the water resource balance and the requirement of water quality standard in Shenzhen river catchment.
