River water quality assessment in selected Yangtze tributaries: Background and method development

Abstract

Water pollution is among the most severe environmental problems in China, particularly in the vicinity of residential and urban areas. In almost all Asian countries, river monitoring is predominantly based on the analysis of chemical data. However, biological data are a worthwhile addition for the determination of the long-term ecological status of rivers and are particularly well-suited in case of steep pollution and disturbance gradients. A tool for river water quality assessment using benthic invertebrates has been developed for selected tributaries of the middle reach of the Yangtze River. Site selection was supported by a preclassification considering physico-chemical and hydromorphological conditions. Following a stratified sampling design, 34 samples were taken in small and large streams in the subtropical mountainous area of western Hubei (湖北) (China) covering a pollution gradient, accompanied by an extensive field protocol on stream characteristics and (physico-) chemical water analyses. The proposed assessment system is computed as an average score per taxon. The challenge to further consider the additional impact from global change into the development of such tools is discussed.

Keywords

benthic invertebrate / biological assessment / ecological quality / organic pollution / Hubei / climate change

References

Bundesministerium für Umwelt (BMU), Naturschutz und Reaktorsicherheit, 2006. Die Wasserrahmenrichtlinie-Ergebnisse der Bestandsaufnahme 2004 in Deutschland. http://www.bmu.de/gewaesserschutz/downloads/doc/35242.php (05/03/2008) (in German)

EU Commission, 2007. Towards Sustainable Water Management in the European Union—First Stage in the Implementation of the Water Framework Directive 2000/60/EC. Communication from the Commission to the European Parliament and the Council, COM (2007) 128 Final

Hering D., Feld C. K., Moog O., . Cook Book for the Development of a Multimetric Index for Biological Condition of Aquatic Ecosystems: Experiences from the European AQEM and STAR Projects and Related Initiatives. Hydrobiologia, 2006, 566: 311-324.

Hering D., Johnson R. K., Kramm S., . Assessment of European Streams with Diatoms, Macrophytes, Macroinvertebrates and Fish: A Comparative Metric-Based Analysis of Organism Response to Stress. Freshwater Biology, 2006, 51(9): 1757-1785.

Jiang M. X., Deng H. B., Cai Q. H., . Species Richness in a Riparian Plant Community along the Banks of the Xiangxi River, the Three Gorges Region. International Journal of Sustainable Development & World Ecology, 2005, 12(1): 60-67.

Kolkwitz R., Marsson M.. Ökologie der Tierischen Saprobien. Internationale Revue der Gesamten Hydrobiologie und Hydrographie, 1909, 2: 126-152.

Moog, O., Sharma, S., 2005. Guidance Manual for Pre-classifying the Ecological Status of HKH Rivers. In: Feld, C. K., Hering, D., Moog, O., eds., Pre-classification Scheme for Ecological Status, List of Impacted Sites for Investigation, and Field Work Plan. Deliverable 7 for Assess-HKH. European Commission, Brussels. 26

Ministry of Construction China Urban Construction Statistics Yearbook 2004, 2005, Beijing: China Building Industry Press

Norris R. H., Norris K. R.. The Need for Biological Assessment of Water Quality: Australian Perspective. Australian Journal of Ecology, 1995, 20(1): 1-6.

Parmesan C., Yohe G.. A Globally Coherent Fingerprint of Climate Change Impacts across Natural Systems. Nature, 2003, 421(6918): 37-42.

Qu X. D., Tang T., Xie Z., . Distribution of the Macroinvertebrates in the Xiangxi River System and Their Relationships with Environmental Factors. Journal of Freshwater Ecology, 2005, 20(2): 233-238.

Sharma S., Moog O., . Chalise S. R., Herrmann A., Khanal N. R., . The Application of Biotic Indices and Scores in Water Quality Assessment of Nepalese Rivers. Ecohydrology of High Mountain Areas, 1998, Kathmandu, Nepal: ICIMOD 641 657

Tang T., Cai Q. H., Liu J. K.. Using Epilithic Diatom Communities to Assess Ecological Condition of Xiangxi River System. Environmental Monitoring and Assessment, 2006, 112(1–3): 347-361.

Tang T., Qu X. D., Li D. F., . Benthic Algae of the Xiangxi River, China. Journal of Freshwater Ecology, 2004, 19(4): 597-604.