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ScienceGroundwater is the water that soaks into the ground from rain and can be stored beneath the ground. Groundwater floods occur when the water stored beneath the ground rises above the land surface. The Groundwater Flooding Medium Probability map shows the expected flood extent...
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Groundwater is the water that soaks into the ground from rain and can be stored beneath the ground. Groundwater floods occur when the water stored beneath the ground rises above the land surface. The Groundwater Flooding High Probability map shows the expected flood extent of...
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Groundwater is the water that soaks into the ground from rain and can be stored beneath the ground. Groundwater floods occur when the water stored beneath the ground rises above the land surface. The Groundwater Flooding Low Probability map shows the expected flood extent of...
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Groundwater is the water that soaks into the ground from rain and can be stored beneath the ground. Groundwater floods occur when the water stored beneath the ground rises above the land surface. The Winter 2015/2016 Surface Water Flooding map shows fluvial (rivers) and...
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Groundwater is the water that soaks into the ground from rain and can be stored beneath the ground. Groundwater floods occur when the water stored beneath the ground rises above the land surface. The Historic Groundwater Flood Map shows the observed peak flood extents caused...
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ScienceWater tracing involves tagging water to see where it goes. The time the tracers take to get from one point to the other is also usually recorded. It is most commonly used in karst environments to ascertain groundwater flow rates, directions and catchment definitions (Zone of...
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ScienceGroundwater is the water that soaks into the ground from rain and can be stored beneath the ground. An aquifer is a body of rock and/or sediment that holds groundwater. There are two main types of aquifer in Ireland – bedrock aquifers, and sand and gravel aquifers. Bedrock is...
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There are more than 1,200 geological formations and members (rock units) in the 1:100,000 Bedrock Geology map. Rock properties such as colour, grain size and type, origin, fossil and mineral content are used to define formations and members. A lot of these properties are not...
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Karst is a landscape with distinctive landforms that develop on rock types that are readily dissolved by water. In Ireland, karstification mostly occurs in limestone regions. This karst dataset contains mapped karst landforms in Ireland including: boreholes, caves, dry...
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ScienceGroup Water Schemes (GWSs) are community-run water supply schemes. About 70% of GWSs take their water from a privately-sourced supply. The rest take their water from an Irish Water connection (DHPLG, 2017). 81% of the privately-sourced supplies affiliated to the National...
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Public Water Supplies (PWSs) are managed by Irish Water, Ireland's national water utility, since 2013. Before this, public water supplies were managed by Local Authorities. More than 70% of public supplies take groundwater from boreholes, springs and infiltration galleries....
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The Groundwater Vulnerability map shows land areas across Ireland where groundwater can be easily polluted. It also shows areas where it is well protected by the subsoil layers. The vulnerability category given to a site or an area is based on how easy it is for water which...
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A well is a hole dug into the ground usually for the purpose of taking water from the ground but also for monitoring groundwater. Most private wells are used for home and farm water supplies are in rural areas. Springs occur where groundwater comes out at the surface. A...
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Subsoil is the layer of soil under the topsoil and on top of the bedrock. The ease with which water can pass through the subsoil is known as the ‘permeability’. The subsoil permeability affects how easily rainwater can soak down into the ground and fill up the groundwater...
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ScienceGroundwater is the water that soaks into the ground from rain and can be stored beneath the ground. An aquifer is a body of rock and/or sediment that holds groundwater. There are two main types of aquifer in Ireland – bedrock aquifers, and sand and gravel aquifers. Bedrock is...
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This dataset is the GSI’s legacy borehole database, compiled over many years from many sources. This dataset is available while we make significant improvements to our borehole holdings.
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ScienceThe survey data combines data from a number of different surveys into one merged dataset. The individual surveys consist of; (1) Tellus Northern Ireland 2005-2006 (2) Cavan-Monaghan, 2006 (3) Tellus Border, 2011-2012 (4) Tellus North Midlands, 2014-2015 (5) Block A1, 2015 (6)...
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Before building new structures engineering companies carry out a site investigation to find out the quality of the ground (strength and depth of soil and to see if rock and or groundwater is present). These investigations involve digging holes such as trial pits and boreholes....
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The survey data combines data from a number of different surveys into one merged dataset. The individual surveys consist of; (1) Tellus Northern Ireland, 2005-2006 (2) Cavan-Monaghan, 2006 (3) Tellus Border, 2011-2012 (4) Tellus North Midlands, 2014-2015 (5) Block A1, 2015...
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The survey data combines data from a number of different surveys into one merged dataset. The individual surveys consist of; (1) Tellus Northern Ireland, 2005-2006 (2) Cavan-Monaghan, 2006 (3) Tellus Border, 2011-2012 (4) Tellus North Midlands, 2014-2015 (5) Block A1, 2015...