『Abstract
　Concentrations of trace elements and heavy metals (Al, As, Ba, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Sb, Se, Sr, V and Zn) in the Danjiangkou Reservoir, the water source area of the Middle Route of China's interbasin South to North water Transfer Project, were analyzed using an Inductively Coupled Plasma Atomic Emission Spectrometer (ICP-AES) and compared with the national and international standards for drinking water. The results indicated that concentrations of As, Pb, Sb and Se in the Reservoir exceeded the standards and they would pose health risk for residents in the region and the water receiving areas of the interbasin water transfer project. Spatial and temporal variability of the trace elements and heavy metals in the Reservoir implies their mixed sources of natural processing and anthropogenic activities in the upper drainage of the Reservoir. The research results would help develop water resource management and conservation strategy for the interbasin water transfer project.

Keywords: Trace elements; Heavy metals; Interbasin water transfer; Seasonal variation; Spatial distribution; Danjiangkou Reservoir; China』

Introduction
Materials and methods
　Sampling preparation
　Analytical method
　Statistical analyses
Results and discussions
　Trace element and heavy metal concentrations
　Spatial distribution of trace elements and heavy metals
　Seasonal variations of trace elements and heavy metals
Conclusions
Acknowledgments
References