珠江水系河水离子总量区域分布特征及其与流域自然条件的关系

Regional Distribution of Total Ion Contents in Zhujiang River System and the Relationship Between Total Ion Contents and Natural Factors

依据珠江水系１０９ 个水化学监测站自１９５９～１９８４ 年的水质监测数据对该流域河水离子总量及其与流域自然条件的关系进行了统计分析． 分析结果表明， 各支流站点河水离子总量多年算术均值主要集中在５０ ～３００ ｍｇ／Ｌ之间． 在区域分布上， 河水离子总量具有从西江→北江→东江逐渐降低的总体趋势． 以区域岩性为因子变量对河水离子总量进行的方差分析表明， 就该水系河水离子总量的对数变换值而言， 花岗岩和变质岩地区显著低于沉积岩地区；而在所涉及的３ 种沉积岩地区间， 河水离子总量的对数变换值亦有显著差异， 其中三叠系海相沉积岩地区最高， 碳酸岩盐地区居中，

Based on water quality monitoring data from Water Year Book, the regional distribution of the total ion contents of Zhujiang River system ,the relationship between the total ion contents of Zhujiang River system and natural factors such as regional climate and lithology are studied. The total ion contents of Zhujiang River system are negatively correlated with the regional rainfall. The total ion contents of river water depend on rock types in the area.