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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.
In view of the river erosion process of dissolved substances, Ca2 + is selected as the characteristic ions of the dissolved substances, and the influence of sediment concentration and particle size on the erosion of soluble matter is discussed by static test method. The normalized parameter of sediment diameter is the specific surface area of sediment particles and the relationship between the erosion amount of soluble material and specific surface area of sediment particles is analyzed.The results show that with the increase of sediment concentration, The total amount of material erosion increased gradually, while the amount of soluble material erosion per unit mass of sediment decreased gradually and gradually approached a certain minimum value. When the particle size decreased, the total amount of soluble material erosion showed the first increase and then decreased Small, and finally increasing trend, but the total amount of soluble material erosion is generally increased.The specific surface area of sediment particles has a good linear correlation with the total amount of soluble material erosion.