Monthly Groundwater Level (GWL) and Standardised Groundwater levels for six sites in the UK illustrating the temporal interpolation of groundwater level hydrographs for regional drought analysis using mixed models

The dataset consists of modelled monthly groundwater level (GWL) and Standardised Groundwater level Index (SGI) time series for six groundwater level hydrographs from the UK. The data forms part of a paper for the peer-reviewed literature describing a modelling method to regularise and standardise groundwater level time series data so that they can be used in the study of groundwater droughts and the propagation of droughts in the wider terrestrial water cycle. The data consists of monthly values of groundwater level expressed as meters above sea level (m asl) and monthly values of Standardise Groundwater level Index (SGI) between January 1980 and December 2015 for the six sites designated as sites A to F. In addition, metadata is provided for the sites consisting of a datum in meters above OD, a borehole depth in meters, a note on borehole completion, a note on the major aquifer intersected by the borehole, values of minimum, maximum, mean and standard deviation of groundwater levels (in metres above sea level), and the number of months with no groundwater level observations for each of the six sites.