河岸浸没预测及排水沟效果研究

针对浸没预测忽略上边界入渗补给和蒸发等问题的缺陷，利用Visual Modflow地下水模拟软件，建立了非稳定流数学模型，设定合理的边界条件，重点探讨了入渗系统和蒸发系统的确定方法和步骤。利用建立的数学模型，模拟计算浸没范围，并设置排水沟边界模拟排水效果。对多层地基，得出3.5m深排水沟可以将浸没范围控制在距堤脚100m范围内的结论。

Study on the Riverside Submergence Prediction and the Effects of Drains

Aiming at the irresolvable limitation of the infiltration recharge and evaporation from the upper boundaries of the submergence prediction, this paper has established a mathematical model for transient flow based on groundwater simulation software Visual Modflow, which takes account the conditions of recharge and evaporation for the analysis of effect of submergence on the nearby farmland. The reasonable boundary is set up and the methods and steps for the determination of recharge and evaporation coefficients are discussed in detail. The proposed model is applied to simulate the submerged range and the drainage effect by setting the drainage boundaries. Conclusions are drawn from the simulation that the 3.5m depth drain on the multi-layer groundsill can control the submerged range in 100 m from the dike.