Investigation and Research on Hydrochemistry Characteristic of China Northwest Rivers

Abstract：River hydrochemistry change may reflect human influence on water environment in a certain degree, and the grasp of river hydrochemistry characteristic and distribution rule is helpful to reasonable use and protect water resources.According to hydrochemistry monitoring material of northwest rivers in recent five years, and compared with the first northwest rivers water resources investigation appraisal result in 80's of last century, we analyzed the main rivers hydrochemistry condition, runoff degree of mineralization, total hardness and the hydrochemistry type distribution.The result show that degree of mineralization and total hardness have both increased to different extent in majority survey station, hydrochemistry type has transformed in individual station and reflecting the deteriorated water quality.

Keyword：Water resources;Degree of Mineralization;Total Hardness;Hydrochemistry Type;