西藏纳木错电导率变化特征初步研究

Preliminary study on the change of electrical conductivity of Namco in Tibet

盐度变化是湖泊的重要物理特性,电导率作为水体盐度最直观的体现,对湖泊的水质特征、湖水能量循环、生态系统研究具有重要影响。本文根据不同年份、不同季节的实地观测资料,分析高海拔、大型内陆湖盆纳木错电导率变化特征及季节差异,并着重分析湖水电导率与水温关系及纳木错能量循环特征。结果显示纳木错湖作为典型的微咸水湖,电导率数值逐年降低,纳木错区域气候环境正向暖湿转变且趋于淡化;湖水温差较小的范围内,电导率与水温二者成相关性变化;纳木错不同区域电导率值存在差异,曲线变化特征显示出纳木错为完全混合型湖泊,湖盆中部物质交换、能量循环大于东部。

Salinity change is an important physical property of lakes,and conductivity is the most direct manifestation of salinity. It has an important influence on lake water quality,lacustrine energy circulation and ecosystem research.According to different years,different seasons of field observations,analysis of high altitude,characteristics and seasonal changes in the electrical conductivity differences Namco large inland lake,and focuses on the relationship between water temperature and conductivity of the water and energy cycle Namco features.The results are shown as a typical micro Namco saltwater lake,conductivity value decreased year by year,Namco forward warm climate regions and tend to fade transition; Within a relatively small temperature range of the lake water,conductivity and water temperature are related to each other; The conductivity of different regions of Namco is different,and the change of the curve shows that Namco is a completely mixed lacustrine. The exchange of matter in the middle of the lake and the energy cycle is greater than the east.