Water classification in the Tanshui river basin in Taiwan

This paper is based on a study conducted to assess and classify the Tanshui river in Taiwan, taking into consideration several relevant parameters. The classification was performed using a new approach. First, the current general uses of the river were assessed; classification was then made by river area, and the priority uses of each. Second, existing water quality was assessed using an indexing approach, specifically the River Pollution Index (RPI). This takes into account all relevant pollutant variables, eg DO, BOD, coliform count, etc, to determine the level of water quality at different reaches of the river. Finally, a classification of the Tanshui river based on its existing water quality and specific best usage was made.