Abstract: We investigated river physical habitat, water physicochemical properties, and benthic macroinvertebrates in the main and tributaries of the Dulong River from October to November 2018. Based on the characteristics of the Dulong River, we developed a comprehensive assessment index of river ecosystem health to evaluate its ecosystem health. The results showed that 85.2% of the sites in the survey were in health status. The sites near the densely populated towns were at the status of sub-health. Specifically, the worst unhealthy sites were found in the Dulongjiang Township with the most developed tourism industry. Rivers are important carrier of freshwater resources. Under the background of continuous development of tourism, a scientific-evaluation of river health status can provide scientific basis for ecosystem restoration, rational exploitation and utilization of water resources, and sustainable development of Dulong River.

Key words: extended exergy analysis, driving mechanism, circulation path, eco-efficiency