Master thesis

Daniela Alejandra Via Rico (2015)
Transient flow modelling of an exploited aquifer in the city of Hanoi, Vietnam and simulation of managed aquifer recharge measures. Master thesis, Technische Universität Dresden, October 2015

ABSTRACT

The rapidly increase of the population in Hanoi city, followed by its expansion, during the last decades has caused a depletion of the groundwater level. In order to address the situation, and to balance the water abstraction, a simulation of MAR techniques implementation and its evaluation was done. Conceptual and numerical groundwater model was developed, using ModelMuse graphical interface of MODFLOW NTW, in order to understand the groundwater flow system and to provide decision support for water resources management. A transient flow model from 2005 to 2006 was built, calibrated and validated with data from 2007; presenting groundwater depletion cones in specific areas, but a decrease of the water table in general. In order to counteract the depletion, three different predictive scenarios including MAR techniques were built. The evaluation of the artificial recharge was made comparing hydraulic heads of the base case with the ones obtained after simulation for a 2 and 5 years period. As a result, it was confirmed that MAR techniques are valuable methods to restore the groundwater balance in Hanoi city; nevertheless, further studies for the long term application are needed and its application should to be accompanied with a municipal management of water abstraction.