Wetlands were long considered a nuisance because they were not suitable for growth of many agriculture products. Nowadays, owing to it’s importance in agriculture engineering, wetlands are invaluable to the mankind. Wetlands due to their commanding influences on ecosystem, benefited people and the environment in terms of water supply, climate regulation, biodiversity conservation and contaminant erosion are very useful in water resources. This investigation presents a numerical approach to detect the environmental dispersion of the fine particles with settling velocity in a wetland flow. A finite difference implicit scheme with layer-adapted mesh is employed to find the solution of the problem. The consequences of the various relevant parameters on the flow and concentration profiles are illustrated graphically. The computed concentration profiles agreed well with the existing experimental data as well as with the numerical solution. The vertical concentration profiles of fine settling particles are presented in different downstream stations with various settling velocities. It is found that the mixing of tracers into the wetland stream significantly influenced by settling velocity, dispersion time, damping factor, porosity, tortuosity, and mass dispersivity. This study finds great importance in understanding and organizing the elementary methods of wastewater treatment and flood damage control in natural and manufactured wetland flows.

湿地长期以来一直被认为是令人讨厌的事情，因为它们不适合许多农产品的生长。如今，由于在农业工程中的重要性，湿地对人类来说是无价的。湿地在水供应，气候调节，生物多样性保护和污染物侵蚀方面对生态系统，人类和环境都有着举足轻重的影响，因此对水资源非常有用。这项研究提出了一种数值方法来检测湿地流中沉降速度下细颗粒的环境分散性。采用具有层自适应网格的有限差分隐式方案来找到问题的解决方案。各种相关参数对流量和浓度曲线的影响以图形方式说明。计算出的浓度曲线与现有的实验数据以及数值解非常吻合。细沉降颗粒的垂直浓度分布在不同的下游站点以不同的沉降速度呈现。发现示踪剂在湿地流中的混合受沉降速度，分散时间，阻尼因子，孔隙率，曲折度和质量分散性的显着影响。这项研究对于理解和组织自然和人工湿地流中的废水处理和洪灾破坏控制的基本方法非常重要。细沉降颗粒的垂直浓度分布在不同的下游站点以不同的沉降速度呈现。发现示踪剂在湿地流中的混合受沉降速度，分散时间，阻尼因子，孔隙率，曲折度和质量分散性的显着影响。这项研究对于理解和组织自然和人工湿地流中的废水处理和洪灾破坏控制的基本方法非常重要。细沉降颗粒的垂直浓度分布在不同的下游站点以不同的沉降速度呈现。发现示踪剂在湿地流中的混合受沉降速度，分散时间，阻尼因子，孔隙率，曲折度和质量分散性的显着影响。这项研究对于理解和组织自然和人工湿地流中的废水处理和洪灾破坏控制的基本方法非常重要。