| Abstract: | The water system in Tibet distributes mainly in the south, and the water originates from precipitation. The local rainy season is from May to July. Finding out the origin and motion regularity on the regional atmospheric precipitation clouds is always emphases about the hydrology and water resource research.37 precipitation samples were collected from 1995 to 1998 in this research area. The hydrogen, oxygen isotope compositions and tritium contents were determined (see table).The results on the table has the follow feature:1 The precipitation line equation Go through regression handling, the precipitation equation is: δ D=7 54 δ 18 O+15 92( n =31),Fall down the right side in the global precipitation line shows stronger evaporation feature, and reflects the disequilibrium level on the Raleigh Fraction in rainfall cloud transportation proceeding. |
