岷江流域河水主要离子地球化学特征及人类活动影响研究

岷江水流量约为8.9×1010m3/yr,约占长江全流域水量10%。作者对4个监测站监测数据的分析发现,岷江TZ 高于世界河流平均值,具有富HCO3-、Ca2 特征;流域化学剥蚀通量为20.48×106t/yr,约占长江流域的10%;化学剥蚀速率为155.9t/km2.yr。岷江在流经四川盆地时主要离子SO42-、Cl-和Ca2 均已受到了人类活动较为严重的影响,酸雨是SO42-的主要污染来源,Cl的污染来源包括生活和工业废水、化肥和井盐开采,农业生产使用的富Ca化肥应是河流Ca污染源之一。

Major ion geochemistry and anthropogenic impacts on the Minjiang River, Sichuan

The Minjiang River has a flow capacity of 8.9×10¹⁰ m³/yr, about 10% of that of the Changjiang River. The analysis of the data from four hydrologic stations has disclosed that the TZ⁺ values for the Minjiang River are higher than the mean values for othe rivers in the world. The river water is HCO₃^- and Ca-rich. The total chemical denudation flux in the Minjiang River is 20.48×10⁶ t/yr, about 13% of that of the Changjiang River. The chemical denudation rates are 155.9 t/km² per year. Since the Minjiang River flows through the densely populated Sichuan Basin, the concentrations of major ions such as SO₄, Cl and Ca are seriously influenced by the anthropogenic factors:SO₄ mainly from the acidic rain; Cl from domestic sewage and industrial waste water, chemical fertilizer and salt production, and Ca from Ca-rich chemical fertilizer.