Approche pédogéomorphologique pour l’évaluation des impacts du tsunami du 26 décembre 2004 sur la qualité des sols et des eaux phréatiques du secteur de Lampuuk, ouest de Banda Aceh

Abstract

This research was carried out in Lampuuk District, Nanggroe Aceh Darussalam Province. The main aims of this research are to analyze the impacts of the tsunami on landforms, especially their morphological aspects, to analyze the change of water quality and to predict the time required to recover the water quality to initial condition. Pedo-geomorphological approach has been applied in this research in order to evaluate the impacts of tsunamis to each geomorphological unit. Geo-electrical sounding and groundwater flow mapping have been conducted to understanding groundwater depth and potential water contaminant flow. Results show that tsunami caused high impacts to water quality and soil. The salinity of soil reached to > 3000 μohms/cm. Time required to recover soil quality into initial condition is approximately 2 years. We estimated that the time needed for water quality recovering is approximately 5 years.