1. Interim Report Objectives of the project
Relevant provisions of the Water Framework Directive (2000/60/EC)
Description of groundwater bodies subject to the study
Description of applied monitoring strategies
Groundwater quality data
Analysis of statistical methods in member states
Statistics
Annex

2. Chemical status (1) (A. V, 2.4.5)
Interpretation and presentation of groundwater chemical status (WFD - common position)
aggregation of results of individual monitoring points for the GW-body as a whole
the mean value of the results of monitoring at each point in the groundwater body or group of bodies shall be calculated; and
the mean value of these calculations for all monitoring points in the groundwater body or group of bodies shall demonstrate compliance with those standards in the manner prescribed in the relevant Directive.

3. Chemical status (1) (A. V, 2.4.5)
Interpretation and presentation of groundwater chemical status (WFD final)
the mean values of the results of monitoring at each point in the groundwater body or group of bodies shall be calculated; and
in accordance with Art. 17 these mean values shall be used to demonstrate compliance with good groundwater chemical status

4. Aggregation methods of MS

5. Aggregation methods of MS

6. Candidates for data aggregation
Procedure of aggregation
1 Temporal aggregation (within year and station)
2 Spatial aggregation (over all stations in GW body) by one of the following candidate methods
arithmetic mean
median
(empirical) 70 %ile
kriging mean
upper confidence limit of the kriging mean
maximum likelihood mean
maximum likelihood 70 %ile
kriging 70 %ile (added)

7. Trend assessment (A. V, 2.4.4) Identification of trends in pollutants
long-term anthropogenically induced upward trends and trend reversal
base year or period from which trend identification is to be calculated
calculation of trends for a body or group of bodies of groundwater
statistical demonstration of trend reversal and level of confidence

8. Trend assessment (A. V, 2.4.4) Procedure
Identification of current practise and identification of lacks (with regard to WFD)
Establishing of a set of candidate methods fulfilling the requirements of WFD
Evaluation of candidate methods using test data sets provided by project partners. Evaluation critera: applicability, interpretability, statistical validity/confidence and statistical power.

9. Trend assessment Functions of trend assessment
Graphical presentation of the time series with, for example, a summary line to indicate the general trend and reveal potential data anomalies
a formal test of trend or trend reversal - with trend and trend reversal defined in an appropriate way
a measure of the tendency to increase/decrease
a comparison of the current level against some reference level or a level in a previous period

10. Trend assessment methods of MS

11. Trend assessment (A. V, 2.4.4) Candidate methods for trend assessment
Regularization (quarterly, half-yearly or yearly)
Spatial aggregation (over all stations in GW body) by
arithmetic mean, median, 70% percentile or
kriging mean, CL of kriging mean or
maximum likelihood
Trend analysis
Test of Mann-Kendall
Theil slopes (in case of a linear trend)
LOESS smoother
Linear and quadratic regression

12. Groundwater-Bodies UK006 NL005 NL004 UK002 NL002 FR001 DE001 FR202
PT105

13. Geological information

14. Schematic profiles

15. Precipitation and temperature