Methodological approach for the analysis of groundwater quality in the framework of the Groundwater Directive

Grima, Juan; Luque-Espinar, Juan; Mejía, Juan; Rodríguez, Ramiro
September 2015
Environmental Earth Sciences;Sep2015, Vol. 74 Issue 5, p4039
Academic Journal
All countries of the European Union are required to determine the evolution of groundwater quality, including trend assessment. With this aim, the Water Framework Directive advises using standardized statistical analysis, like least squares regression. But this methodology is not applicable to all situations and what's more, does not offer a sound methodological framework. There are many statistical procedures to evaluate temporal behaviour of environmental data but, when applied unconnectedly, erroneous conclusions can be reached due to bias of assuming partial or particular conducts. In this paper, a methodology for studying such information is proposed, integrating most common methods for time series analysis. To provide a sound scientific basis to the methodology, statistic intervals combined with trend assessment are proposed, after adjusting a regression curve and applying smoothing techniques to select the baseline level. Confidence intervals have been used when a threshold value does exist. Whether it is not fixed or the baseline level exceeds the standard, prediction intervals were employed. The approach has been analysed at Plana de Vinaroz Groundwater Body (PV). As a result, PV is classed of poor chemical status in regard to diffuse pollution and sea water intrusion, and consequently a programme of measures is necessary. In relation with marine intrusion, a regional downward trend has been found, showing no further deterioration. An additional outcome of the procedure is a methodological framework for the systematic review of the relevant information for evaluation of Groundwater Body chemical status, which includes additional steps to check the effectiveness of the programme of measures and update the baseline level periodically. The proposed methodology, based on procedures usually applied separately, provides a comprehensive framework for groundwater quality data analysis. It will allow more rigorous implementation objectives of the Directive. Results obtained for the developed case are more robust from the statistical point of view, because all hypotheses have been contemplated.


Related Articles

  • Spatio-temporal impact of climate change on the groundwater system. Dams, J.; Salvadore, E.; Van Daele, T.; Ntegeka, V.; Willems, P.; Batelaan, O.; Hendricks Franssen, H.-J. // Hydrology & Earth System Sciences;2012, Vol. 16 Issue 5, p1517 

    Given the importance of groundwater for food production and drinking water supply, but also for the survival of groundwater dependent terrestrial ecosystems (GWDTEs) it is essential to assess the impact of climate change on this freshwater resource. In this paper we study with high temporal and...

  • First Autonomous Bio-Optical Profiling Float in the Gulf of Mexico Reveals Dynamic Biogeochemistry in Deep Waters. Green, Rebecca E.; Bower, Amy S.; Lugo-Fernández, Alexis // PLoS ONE;Jul2014, Vol. 9 Issue 7, p1 

    Profiling floats equipped with bio-optical sensors well complement ship-based and satellite ocean color measurements by providing highly-resolved time-series data on the vertical structure of biogeochemical processes in oceanic waters. This is the first study to employ an autonomous profiling...

  • Spatiotemporal variability of typhoon impacts and relaxation intervals on Jaluit Atoll, Marshall Islands. Ford, Murray R.; Kench, Paul S. // Geology;Feb2016, Vol. 44 Issue 2, p159 

    Storms are important drivers of geomorphic change within atoll settings, causing rapid island erosion while also initiating island building through the generation of vast quantities of reef-derived sediment. Due to the combined effects of storms and sea-level rise, reef islands are thought to be...

  • Long-Term Temporal Variation of Extreme Rainfall Events in Australia: 1910–2006. Fu, Guobin; Viney, Neil R.; Charles, Stephen P.; Liu, Jianrong // Journal of Hydrometeorology;Aug2010, Vol. 11 Issue 4, p950 

    The temporal variability of the frequency of short-duration extreme precipitation events in Australia for the period 1910–2006 is examined using the high-quality rainfall dataset identified by the Bureau of Meteorology, Australia, for 189 stations. Extreme events are defined by duration...

  • Analysis of Spatio-Temporal Disease Pattern using Spatial Auto Correlation Methods: Case of Acute Gastroenteritis in Coimbatore District, Tamilnadu, India. Joseph, Pawlin Vasanthi; Brindha, B.; Joshua, Vasna; Devi, Prashanthi; Balasubramanian, S. // Indian Journal of Public Health Research & Development;Jul-Sep2014, Vol. 5 Issue 3, p296 

    Background and Objectives: In epidemiology many of the infectious disease events do not occur randomly in geographical context but occur in clusters. Geographical or spatial analysis comes into play due to the existence of spatial dependence in data. The main objective was to examine the...

  • Temporal-Spatial Variation of Global GPS-Derived Total Electron Content, 1999–2013. Guo, Jinyun; Li, Wang; Liu, Xin; Kong, Qiaoli; Zhao, Chunmei; Guo, Bin // PLoS ONE;7/20/2015, Vol. 10 Issue 7, p1 

    To investigate the temporal-spatial distribution and evolutions of global Total Electron Content (TEC), we estimate the global TEC data from 1999 to 2013 by processing the GPS data collected by the International Global Navigation Satellite System (GNSS) Service (IGS) stations, and robustly...

  • Temporal Patterns in Seawater Quality from Dredging in Tropical Environments. Jones, Ross; Fisher, Rebecca; Stark, Clair; Ridd, Peter // PLoS ONE;10/7/2015, Vol. 10 Issue 10, p1 

    Maintenance and capital dredging represents a potential risk to tropical environments, especially in turbidity-sensitive environments such as coral reefs. There is little detailed, published observational time-series data that quantifies how dredging affects seawater quality conditions...

  • On the spatio-temporal analysis of hydrological droughts from global hydrological models. Perez, G. A. Corzo; van Huijgevoort, M. H. J.; Voß, F.; van Lanen, H. A. J. // Hydrology & Earth System Sciences Discussions;2011, Vol. 8 Issue 1, p619 

    The recent concerns for world-wide extreme events related to climate change phenomena have motivated the development of large scale models that simulate the global water cycle. In this context, analyses of extremes is an important topic that requires the adaptation of methods used for river...

  • Detection and attribution of global change effects on river nutrient dynamics in a large Mediterranean basin. Aguilera, R.; Marcé, R.; Sabater, S. // Biogeosciences Discussions;2015, Vol. 12 Issue 7, p5259 

    Attributing changes in river water quality to specific factors is challenging because multiple factors act at different temporal and spatial scales, and it often requires examining long-term series of continuous data. But data consistency is sometimes hindered by the lack of observations of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics