FEM quasi-3D modelling of responses to artificial recharge in the Bangkok multiaquifer system

Quasi three-dimensional (quasi-3D)modelling plays a major role in analysis of groundwater flow in multiaquifer systems and it can be an efficient tool for artificial recharge modelling. As the role of artificial recharge in groundwater management continues to increase, analysis of responses to artificial recharge has a particular significance. This paper deals with some practical aspects of the development of a general quasi-3D model based on an algorithm employing the combined techniques of Finite Element Method (FEM) and convolution integral. Responses to well recharge in a multiaquifer system were analyzed. The results of flow and consolidation analyses for an idealized hydrogeological section of the Bangkok aquifer system are presented to illustrate the role of artificial recharge in land subsidence control for Bangkok city. Here, land subsidence due to groundwater extraction is a serious issue to be resolved, and artificial recharge has been recommended as a supplemental means of mitigation.