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The quality of groundwater resources needs to be assessed and monitored to ensure sustainable use and management.Groundwater-related data are characterized by inaccurate,missing values and significant uncertainties;whose sources range from inadequacies and errors in the measuring techniques to insufficient sampling times and frequencies.Uncertainties are
The quality of groundwater resources needs are be assessed and control to ensure sustainable use and management. Groundwater-related data are characterized by inaccurate, missing values and obvious uncertainties; whose sources range from inadequacies and errors in the measuring techniques to not sampling .Uncertainties are