Pearl River pilot study
The pilot study was conducted on the Gui River, a northern tributary of the Pearl River and a famous tourist destination with a unique karst landscape. The study was undertaken with the Pearl River Water Resources Commission.
Twenty-four sites were sampled across the catchment and assessments were made of water quality, benthic macroinvertebrates, fish, algae, aquatic and riparian vegetation, and physical form. In addition, catchment disturbance and hydrological alteration was assessed using existing data.
Different indicators were tested against levels of catchment disturbance to identify those that responded predictably. Based on this and other factors, suitable river health indicators were selected. The results of the assessment were used to develop a river health report card.
A detailed environmental flows study was completed for the Li River, an important reach of the Gui River. The study identified the flow regime needed to support fish and vegetation, to maintain water quality and the river’s physical form, and to allow the passage of tourist boats.
Technical reports with further detailed information are also available.
Summary of the results of the river health assessment for the Gui River