Evaluation of road traffic impact on the aquifers of the crossed areas. Application to Annaba plain crossed by (NR21, NR16 and NR44). Northeastern Algeria

Abstract

In the Annaba plain, the contamination of groundwater and road runoff by heavy metals was studied through combining the geochemical and hydrochimical approaches. For different metals, the mineral sources of contamination, as well as the geochemical processes of mineral weathering were established. The understanding of the geochemical mechanisms involved and the realized assessment allowed determining the origins, the modes of transport(collective or individual, heavy or light)and control of metals in the plain. In this study, we examine the risks of road traffic on the quality of groundwater and road runoff in the Annaba plain crossed by three important communication nationals roads: RN 44, 21 and 16. The survey was carried out in June 2011, April 2012 and December 2013 and covers the transport of heavy metals from the road traffic in the roadsides environment. The concentration of heavy metals Pb²⁺, Zn²⁺, Cu²⁺ and Fe²⁺ in groundwater are respectively: 0.001 mg.l^-1, 0.13 mg.l^-1, 0.11 mg.l^-1and 1.055 mg.l^-1, on average.