Spatial variability of trace elements with Moran’s i analysis for shallow groundwater quality in the Lower Katari Basin, Bolivian Altiplano

• The southeastern part of the Titicaca Lake near the Cohana Bay in the Bolivian Altiplano, has environmental problems caused mainly by urban and industrial wastes upstream of the Katari Basin and by natural geological conditions. This environmental condition has generated an increase in the concentrations of some trace elements in the groundwater. The Moran’s I statistic was used with LISA (Local Indicators of Spatial Association) method to know the spatial autocorrelation and the spatial variability of As, Sb, B, Al, Mn and F. Arsenic and antimony are the main pollutants due to natural geological conditions and boron due to the anthropogenic activities. Almost half of all the shallow groundwater samples exceeded the WHO and NB-512 guideline values mainly for antimony, boron and arsenic, whereby the spatial distribution of these trace elements in groundwater raises a significant concern about drinking water quality. 

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences (hsv//eng)

Nyckelord

Antimony

Arsenic

Boron

Geology

Groundwater

Industrial wastes

Potable water

Spatial variables measurement

Water quality

Anthropogenic activity

Environmental conditions

Environmental problems

Geological conditions

Shallow groundwater

Spatial associations

Spatial autocorrelations

Spatial variability

Trace elements

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