Evaluación de la calidad del agua en la planta potabilizadora El Dorado (Bogotá D.C.) a través del análisis estadístico de series de tiempo

Abstract

An evaluation of water quality in the water treatment plant El Dorado (Bogota D.C.) through the statistical analysis of time series is presented. The concentrations recorded were on average 9% higher than those recorded in the dry season. With respect to compliance, concentrations exceeded the maximum permissible limits of Colombian legislation in no higher percentages than 2%, with the exception of free residual chlorine parameters and electrical conductivity during the period 2004 - 2007. In addition, it was observed a strong correlation between parameters chlorides and electrical conductivity (r = 0.68) and free residual chlorine and total iron (r = 0.59); allowing parameters to identify indicators of quality in the plant. Finally, the ARIMA models identified showed a strong dependence on fluctuations weeks and months earlier on forecasts, and from the point of weekly view, the evaluation of water quality by establishing control limits was the most optimal since it took into account the time structure of the time series (actual treatment regimen) and fluctuations over time; allowing to identify the exceedances were no greater than 5.9% and accounted for associated degree of acceptability of the population supplied parameters