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

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

Le MNT sur le département des Bouches-du-Rhône a été produit dans le cadre de la réalisation d'une orthophotographie à 15cm. Vols effectués en deux parties : du 21 août 2009 au 11 septembre puis les 23 et 24 septembre. Produit à façon dont le cahier des charges a été réalisé par un groupement de commande constitués d'organismes publics (dénommé GO 13). La société Infoterra (fusionnée désormais avec Spot Image) a été retenue pour produire cette base de données.