乌图美仁地区典型流域水化学特征对比研究

INVESTIGATION AND COMPARISON ON HYDROCHEMISTRY CHARACTERISTIC OF TYPICAL BASIN IN URT MORON

对格尔木市乌图美仁地区两条相邻流域采集水样分析并对水化学剖面进行对比,研究了地表水及地下水转化过程的水化学变化规律。根据测试结果绘制Piper三线图,采用舒卡列夫分类法确定冲洪积平原存在5种水化学类型,总体上:阳离子以钠钾型为主;阴离子主要为SO_4^(2-)和Cl^-;水化学类型总体表现为硫酸氯钠型。通过对Gibbs图分析得出:岩石风化作用是水化学类型的主导影响因素,小灶火流域的人类活动影响了水化学组分的含量,并显著地增强了水体溶解性总固体自冲洪积平原上游至下游先减小后增大的变化趋势。同时,深化了乌图美仁地区典型流域水化学特征的变化规律,揭示了该地区人为因素对水化学特征的影响,为保护该地区地下水资源提供参考。

Based on collection and analysis of water samples,the hydrochemical profiles of two closed basins in Urt Moron of Golmud City were compared in this paper. Changes in hydrochemistry of surface water and groundwater were analyzed.According to the test results,the piper trilinear nomograph was drawn. Five kinds of water chemistry types in alluvial-proluvial plain were identified by Shukallev. As a whole,Sodium was the main cation,and sulfate and chloride were the main anions.The main hydrochemistry type was the sodium chloride. The Gibbs diagram was analyzed as well,and the rock weathering was given priority to the hydrochemistry types. Human activities affected the hydrochemical components and significantly enhanced the tend of total dissolved solids that decreased at first then increasesd which was from the upstream to the downstream of the alluvial-proluvial plains. This study deepened the changed of water chemistry characteristics in the typical watershed of Urt Moron area,revealed the influenced of human activities,and had guiding significance for protecting the groundwater resources in the area.