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中文摘要：
针对河流溶解性物质侵蚀过程,选用Ca2＋作为溶解性物质的特征离子,采用静态试验方法,探讨了泥沙浓度与颗粒粒径对可溶性物质侵蚀规律的影响,构建了能够综合表征泥沙浓度与粒径组成特性的归一化参数———泥沙颗粒比表面浓度,并对可溶性物质侵蚀量与泥沙颗粒比表面浓度间的关系进行了分析.结果表明,随着泥沙浓度升高,可溶性物质侵蚀总量逐渐增加,而单位质量泥沙的可溶性物质侵蚀量却不断减小,并逐渐趋近于某极小值.当颗粒粒径减小时,可溶性物质侵蚀总量呈现出先增加、再减小、最后再增加的变化趋势,但可溶性物质侵蚀总量在总体上是增大的.泥沙颗粒比表面浓度与可溶性物质侵蚀总量之间具有良好的线性相关性.
英文摘要：
With regard to the erosion processes of soluble matters in rivers,selecting Ca2＋ as the representation of soluble matters,and using a static test method,the impacts of sediment concentration and particle size on erosion of soluble matters is discussed.Then a normalized parameter named specific surface area concentration of sediment particles which reflects the integrated properties of sediment concentration and particle size composition is proposed;and the relationship between this defined parameter and the soluble matters erosion amount is analyzed.The results indicate that with sediment concentration increasing the total erosion amount of soluble matters gradually increases.However,the erosion amount of soluble matters per unit mass of sediment decreases,and gradually to a particular minimum.When particle size becomes fine,the erosion amount of soluble matters shows a trend of first increasing,then decreasing and finally increasing again.But the total erosion amount of soluble matters is enlarged in general.In addition,there is a good linear correlation between the soluble matters erosion amount and the specific surface area concentration of sediment particles.
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