Groundwater flow modelling in the central zone of Hanoi, Vietnam

Abstract

On the basis of a review of the Quaternary sedimentary architecture in the area of Hanoi city (Vietnam), a numerical, deterministic and three-dimensional groundwater flow model has been built for a simulation between 1995 and 2004. The sedimentary architecture has been constructed on the basis of the data from 32 drillings covering the entire Quaternary sequence (but with little sedimentological detail), as well as hydrographical and hydrogeological data. Both steady-and transient-state conditions were tested. Results calculated by the model seem to indicate that the conceptual hypotheses adopted are reasonable for the modelled domain and period. The simulation allows for calculation of the regional groundwater flow trends. It is also used for assessing the relative importance of the various recharge sources of the shallow aquifer system in Hanoi, and for estimating the interactions between groundwater and the Red River. Results calculated by the model seem to indicate that the conceptual hypotheses adopted are reasonable for the modelled domain and period. The simulation allows for calculation of the regional groundwater flow trends. It is also used for assessing the relative importance of the various recharge sources of the shallow aquifer system in Hanoi, and for estimating the interactions between groundwater and the Red River.

A preliminary analysis of the hydrogeological conditions and groundwater flow in some parts of a crystalline aquifer system: Afigya Sekyere South District, Ghana

“…They have provided sufficient information for developing proper decision support systems for effective management of groundwater resources under a certain set of restraints (e.g. Boronina et al, 2003;Jusseret et al, 2009). Models are the best methods known for evaluating flow processes in the subsurface (e.g.…”

Fate of Arsenic during Red River Water Infiltration into Aquifers beneath Hanoi, Vietnam

“… 21 , 22 However, the effect of Red River bank infiltration on the water quality of the aquifers below Hanoi is completely unknown, even though it is considered the main source of groundwater recharge below the city. 2 …”

“… 8 , 9 In contrast, the water of the Red River running along the city of Hanoi is very low in dissolved arsenic. 12 , 25 , 26 Therefore, one could hope that the large scale infiltration of river water 2 can improve the water quality in the aquifers and also flush out the arsenic. The time scale needed for flushing arsenic from the aquifer is currently unknown but must depend on infiltration rates, groundwater flow patterns, and residence times as well as the geochemical processes controlling the groundwater arsenic content.…”

Simulation of groundwater flow in a crystalline rock aquifer system in Southern Ghana - An evaluation of the effects of increased groundwater abstraction on the aquifers using a transient groundwater flow model

“…Numerical models have been successfully applied in some previous basin-scale hydrogeological studies (e.g. Ophori, 1999;van der Hoven et al, 2002;Senthilkumar and Elango, 2004;Zhang et al, 2004;Lutz et al, 2007;Barazzouli et al, 2008;He et al, 2008;Jusseret et al, 2009;Lin et al, 2009;Yidana et al, 2010;Abd-Elhamid and Javadi, 2011;Hu et al, 2011;Yidana, 2011). Numerical groundwater flow simulation models have been used to characterise contaminant transport in the subsurface (e.g.…”