论文部分内容阅读
2006年和2007年的整个消融期内,在天山乌鲁木齐河源1号冰川末端水文控制点逐日定时采集融水径流样品,对样品的主要可溶离子、pH、电导率EC、总溶解固体TDS和悬移质颗粒物SPM进行了分析.结果表明:天山乌鲁木齐河源1号冰川融水径流离子类型为Ca2+-HCO-3-SO2-4,呈弱碱性.融水径流中TDS变化受日径流量调节显著,表现为消融初期和末期浓度较高,消融强烈时浓度较低;SPM以细颗粒物质为主,各粒度组分含量变化幅度较大,且质量浓度SSC年内变化与TDS呈相反的变化趋势.融水径流中离子组成主要受岩石风化作用影响,离子摩尔比值和Piper图分析表明,控制冰川径流离子组成的主要过程是碳酸盐、黄铁矿和长石类矿物风化作用.
During the entire ablation period of 2006 and 2007, the melt water runoff samples were collected daily at hydrological control points at the end of Glacier No. 1 of the Urumqi River source in Tianshan Mountains. The main soluble ions, pH, EC, total dissolved solids (TDS) and suspended The results showed that the ion type of glacial melt runoff in Urumqi No. 1 glacier in the Tianshan Mountains was Ca2 + -HCO-3-SO2-4, which showed weak alkalinity.The TDS in melt-melt runoff was significantly affected by the daily flow rate , Which was higher at early and last ablation and lower at ablation. SPM was dominated by fine-grained matter, and the content of SPM varied greatly. The change of SSC during the year was contrary to the change of mass concentration. Ion composition in melt-water runoff is mainly affected by rock weathering. The ion molar ratio and Piper diagram show that the main process of controlling glacial runoff ion composition is weathering of carbonate, pyrite and feldspar minerals.