Study on the water environment and composition of Lhasa River

摘要

By measuring and comparing δ~18O, an d3_h values of different sections in lhasa River, we can trace its water resource and water environment. We have condluded that the upper Reaches of the Lhasa River are mainly supplied by melt-water (with lower 3_h value and mineraliza- Tion degree) an dunderground water (with lower 3_h value and higher mineralization degree). The Middle reaches are mainly supplied by rainwater (with higher 3_h value and mineralization degree).