中文摘要：

暗河发育岩溶地区地下暗河中污染物的运移模拟研究一直是难点。实际工程应用中,由于传统数值模拟模型没有参数反应悬浮物的沉降作用,通常仅概化考虑悬浮物在地下暗河中的迁移而采用河流一维稳态水质模型进行预测,缺少其它方法进行有效验证。本文通过实验和数值模拟相结合的方法,研究了管径、悬浮物初始浓度、粒径、流速对管道中悬浮物沉降系数的影响,并初步探究数值模型机理相近的吸附系数等效替代一维稳态水质模型沉降系数的可行性,再进一步根据广西某岩溶区排泥库工程构建具体条件下吸附系数与沉降系数的等参替代关系,最后将其应用于数值模型模拟。计算结果表明经过参数等效替代后的数值模拟方法比一维稳态水质模型更为合理。

英文摘要：

The migration of karst underground fiver in the area of suspension simulation is always difficult. In practical ap- plications, due to the role of traditional settlement numerical model without suspension parameters of the reaction, usually only consider the generalization of suspended particles in the underground river in the river by using one - dimensional water quality prediction model, the lack of other methods for effective verification. This paper combines experiment and numerical simula- tion, laboratory experiments on the transport of suspended solids in pipes under different diameters and initial concentrations are designed, the feasibility of the equivalent substitute of the one - dimensional steady - state water quality model settlement coefficient in a numerical model with similar preliminary investigation mechanism is presented, coupled with mud in guangxi karst area library engineering build specific adsorption coefficient and subsidence coefficient under the condition of isoparametric alternative relations, finally the isoparametric alternative numerical model used in the karst area rivers suspended solids transport simulation, the numerical results show that the numerical model with equ!valent parameters is more reasonable than one - dimensional steady - state water quality model. This study enriches the suspension of karst underground river transport simulation method.