A national scale map that shows yearly LTA potential recharge values (mm/year) calculated over the Netherlands. Values are averaged over the period 1981 to 2010

This layer shows the locations of the boreholes where lumped models are applied to estimate recharge values. Different modelling tools are applied by TACTIC partners including BRGM, BGS, GEUS, GSS, GSI, GTK, IGME, ISPRA, SGU, and TNO. The boreholes will display historical and future estimates of recharge values calculated from these tools.

The Groundwater Recharge map shows where different amounts of rainfall reach the stores of groundwater (the ‘aquifers’) across Ireland. The estimated average annual recharge amount is shown in units of millimetres per year (mm/yr). The amount of recharge was calculated over the period 1981-2010 and then averaged to give a yearly amount. The groundwater recharge map shows estimated average annual recharge to the deep groundwater system. The ‘deep groundwater’ can be tapped steadily year-round and yields aren’t significantly influenced by seasonal changes. The main geological controls on groundwater recharge include soil drainage, subsoil type, subsoil permeability, subsoil thickness, and the ability of the underlying aquifer to accept percolating waters. This map is best displayed to the scale 1:40,000 (1cm on the map relates to a distance of 400m). Users of the map should be aware that for each hydrogeological scenario, the map uses the typical recharge coefficient from an available range. It also uses the 30 year average effective rainfall. This means that groundwater recharge may be over- or under-estimated, depending on local conditions. Users should also be aware that the recharge cap applied to poorly productive aquifers may need further examination for particular studies

A dataset showing the locations of the boreholes where long term average recharge values (mm/year) are calculated using multiple recharge calculation tools. Clicking a borehole will lead to a figure showing the LTA recharge calculated using one or more than one tool. Models are driven by rainfall and potential evaporation and calibrated using either time series of groundwater levels or flow discharges at a gauging station or both depending on the tool. Please refer to tool used to identify if the recharge calculated is actual or potential recharge. The aim of applying multiple tools is to address the uncertainty in the calculated recharge. Values are best used for guidance only.

A national scale map that shows yearly LTA actual recharge values (mm/year) calculated over Spain. The Recharge for the reference period (1980-2010) were calculated at yearly scale by using an empirical rainfall-recharge model (Pulido Velazquez et al., 2018).

A dataset showing the locations of the boreholes where time series of recharge values (mm/year) are calculated using multiple recharge calculation tools. Clicking a borehole will lead to a figure showing the time series of recharge values if available. Models are driven by rainfall and potential evaporation and calibrated using either time series of groundwater levels or flow discharges at a gauging station or both depending on the tool. Please refer to tool used to identify if the recharge calculated is actual or potential recharge. The aim of applying multiple tools is to address the uncertainty in the calculated recharge. Values are best used for guidance only.

A dataset showing the locations of the boreholes where monthly projected recharge values are calculated. Clicking a borehole will lead to a figure showing the monthly projected values. Values are best used for guidance only.

A dataset showing the locations of the boreholes where LTA recharge values are calculated together with percentile values to address uncertainty. Clicking a borehole will lead to a figure showing the LTA values (mm/year) and the corresponding percentile values. Values are best used for guidance only.

A national scale map that shows yearly LTA potential recharge values (mm/year) calculated over France. Values are calculated at daily time step and averaged over the period 1981 – 2010 The map presents the mean yearly potential groundwater recharge (refers to the part of the precipitation not stored in the soil, nor used by the vegetation) that infiltrates to potentially reach the aquifers calculated over the period 1981-2010 and at the spatial scale of 8 x 8 km grid cells and provided in mm/years

A national scale map that shows yearly LTA potential recharge values (mm/year) calculated over Great Britain mainland using the simplified FAO method driven by rainfall and potential evaporation data over the period 1980 to 2010