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198 9- 0 5～ 1 990 - 0 4期间在罗纳河下游近入海口处按月采集溶解及颗粒态样品 ,分析了其中的营养盐、铝及常量元素含量。结果表明 ,罗纳河中硝酸盐、磷酸盐、硅酸盐的平均浓度分别为65.7,3.8,79.8μmol/ dm3。研究的周年内变化范围大 ,其含量明显高于世界上其它受人文活动冲击较小的河流。而在同样的时间尺度下 ,河流中溶解态铝的含量变化较大 ,其含量先随流量的增加而增加 ,其后则由于高流量的稀释作用而下降 ;颗粒态铝的含量则保持在一个较为稳定的水平上。研究结果表明 ,河流中的铝主要来自岩石风化 ,人为活动对其影响较小。通过溶解态铝与营养盐含量的统计分析表明 ,罗纳河中的溶解态铝与初级生产之间不存在相关关系 ,它的含量主要受界面吸附过程控制。通过对常量元素的分析表明 ,罗纳河中常量阴阳离子的含量顺序为 HCO-3 >Ca2 +>SO2 -4 >Na+>Cl->Mg2 +>K+,流域内溶解态组份的含量主要受碳酸盐的溶蚀控制。
The dissolved and particulate samples were collected on a monthly basis at the lower reaches of the Rhone from 198 9 0 05 to 1 990 0 4 to analyze nutrient, aluminum and elemental concentrations. The results showed that the average concentrations of nitrate, phosphate and silicate in the Rhône were 65.7, 3.8 and 79.8 μmol / dm3, respectively. The study varied greatly in the anniversaries, and its content was significantly higher than other rivers in the world that were less affected by cultural activities. At the same time scale, the content of dissolved aluminum in the river changed greatly, its content increased with the increase of the flow rate, and then decreased due to the dilution of the high flow rate. The content of the particulate aluminum remained at one More stable level. The results show that the aluminum in the river mainly comes from rock weathering, and human activities have little effect on it. The statistical analysis of dissolved aluminum and nutrient content shows that there is no correlation between the dissolved aluminum in the Rhone River and the primary production, and its content is mainly controlled by the adsorption process of the interface. The analysis of constant elements showed that the order of anion and cation in the Rhone was HCO-3> Ca2 +> SO2-4> Na +> Cl-> Mg2 +> K +. The content of dissolved components in the basin was mainly affected by carbon Acid erosion control.