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The Hydrochemical Characteristics in the Dongkemadi Glacier Area, Tanggula Range

Sheng Wenkun, Wang Ninglian and Pu Jianchen (Laboratory of Ice Core and Regions Environment, LIGG, CAS, 730000)  
Chemical materials in the Dongkemadi Glacier mainly originate in the neighbour area. The order of total concentration, hardness, alkalinity in the Dongkemadi River water as well as in new and old snow on the glacier is: River water Old snow New snow. They are all fresh water, however, new snow is extreme soft water, neutro-acidic, old snow is extreme soft awater, neutro-alkaline, and river water is alkaline soft water. Their hydrochemical pattern generally is HCO_3 ,SO_4 -Ca or HCO_3 -Ca, and specially HCO_3 -Ca, Na. Total concentration, hardness or alkalinity of water increase with decreasing altitude in the area.
【CateGory Index】: P332.7
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