摘要
河流pH是河流水环境的重要指标及其健康程度的关键性因素,选取滇池流域4条有代表性的入湖河流为研究对象,分析了河流水体pH时空分异特征,探讨了pH变化的关键影响因素和内在机理。结果表明:滇池主要入湖河流pH上游呈弱酸性,中下游呈弱碱性,下游pH出现下降趋势;雨季的河流pH波动比旱季大,源头的pH变化幅度小于中下游;影响滇池入湖河流pH变化的主要环境因子有温度、总溶解性固体(total dissolved solids,TDS)和总氮(total nitrogen,TN),主要离子是Ca2+、HCO-3和Mg2+;碳酸盐平衡缓冲系统和离子平衡缓冲系统的变化是造成滇池入湖河流pH变化的内在原因。
The pH value of rivers is an important indicator of the river's environment and a key factor of the river's health.Taking the main rivers into the lake in Dianchi Lake basin as an object,differentiation characteristics of pH value in the river water was researched.The key influencing factors and internal mechanism of pH change were also discussed.The results show that the pH value of the main rivers entering the lake in Dianchi Lake basin is weakly acidic in the upstream,weakly alkaline in the midstream and downstream,and the pH value downtrend in the downstream.The pH value in the rainy season fluctuates more than in the dry season,and the source variation less than the midstream and downstream.The main environmental factors affecting the pH change of the rivers entering the lake in Dianchi are temperature,total dissolved solids(TDS),and total nitrogen(TN),which main ions are Ca2+,HCO-3 and Mg2+.The changes in the Carbonate system and Ion balance system are the internal cause.
作者
岑言霸
苏斌
冯泽波
史正涛
CEN Yan-ba;SU Bin;FENG Ze-bo;SHI Zheng-tao(Key Laboratory of Environmental Change on Lower Latitude Plateau for Universities in Yunnan Province/Faculty of Geography, Yunnan Normal University, Kunming 650500, China)
出处
《科学技术与工程》
北大核心
2021年第26期11432-11442,共11页
Science Technology and Engineering
基金
云南师范大学博士科研启动项目(01300205020503197)
云南师范大学研究生科研创新基金(YJSJJ21-B86)。
关键词
河流pH
pH变化机理
滇池入湖河流
the pH value of rivers
mechanism of pH change
the rivers flowing into Dianchi Lake
