This map contains the measured groundwater heads provided by the drinking water supply company Vitens B.V (The Netherlands) used in the investigation
'Estimation of average diffuse aquifer recharge using time series modeling of groundwater heads'. These data are also available in the groundwater database 
of TNO (Dutch Applied Institute of Physics). This database is called Data and Information on the Dutch Subsurface, URL:https://www.dinoloket.nl/en/subsurface-data
Authors: Christophe Obergfell (1), Mark Bakker (1), Kees Maas (2) 
(1) Faculty of Civil Engineering and Geosciences, Delft University of Technology, The Netherlands, (2) Maas Geohydrologisch Advies, The Netherlands. 
Corresponding author
Christophe Obergfell, Faculty of Civil Engineering and Geosciences, Delft University of Technology, The Netherlands (C.C.A.Obergfell@tudelft.nl)

The piezometers are named in the manuscript P1, P2,P3,P4,P5 cooresponding to the following codes attributed by TNO-NITG 
(Dutch National Geological Survey Institute):28AP0093,28AL0019,28CP0197,28CP0204,28AP0134, respectively.


The piezometers charcteristics are summerized below:
Piezometer number	Piezometer id	X coordinate (m)	Y coordinate (m)	Screen level (m NAP)	Surface elevation (m NAP)	Median observed heads (m NAP)	Distance to middle of well field (m)
1	28AP0093	224550	488100	2.10	11.60	9.24	2750
2	28AL0019	224668	488474	8.07	10.32	9.15	2900
3	28CP0197	227398	485958	4.70	15.26	8.52	825
4	28CP0204	226894	485364	2.83	21.26	9.59	1025
5	28AP0134	226181	488081	-2.50	22.40	8.46	1800
