Sectorization Of Environmental Risk And Human
Consumption Of Manganese In Groundwater
Extracted From The Sinaloa River Aquifer
Author(s)
M. Norzagaray Campos, M. Ladrón de Guevara Torres,
E. Troyo Diéguez, P. Muñoz Sevilla, O. Llanes Cárdenas
& H. A. González Ocampo
Abstract
The research reported in this paper had three objectives. The first was to draw a
map of the piezometric contours of the Sinaloa River Basin to enable an
interpretation of the hydrodynamic behavior of the basin. The second objective
was to establish a relationship between the hydrodynamics of the basin and
levels of concentration of manganese (Mn), an element which is vital for human
survival but toxic at high levels. Given that some of the rural and urban
inhabitants of the basin consume untreated groundwater, the third objective was
to create a map of the region showing the locations of high manganese level risk
in the water. To characterize the hydrodynamics, 40 wells were selected at
random. Groundwater depth, ground elevation, hydraulic load and piezometric
surface were measured. A water sample was taken from each selected well, and
spectrometric laboratory techniques employed to measure manganese and iron
levels; the latter as a check on the robustness of Mn measurements on untreated
water. The piezometric analysis showed the presence of a regional water source
and a local water source, which has protected the basin from saline intrusion for
many years. However there are sources of high manganese concentrations in a
range of 0.01 to 1.2 mg L-1, which are moving with these two flows at average
receptive velocities of 4.2×10-3 mh-1 and 1.6×10-3 mh-1. In an analysis of
Keywords
manganese, iron, groundwater, risk, human consumption, flow
Related Book
Other papers in this volume
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