Natural Hazard Category Valid None Data Dictionary Vocabularies Eionet Data Dictionary Artificial water-bearing infrastructure Flooding of land by water arising from artificial water-bearing infrastructure or failure of such infrastructure. This source could include flooding arising from sewerage systems (including storm water combined and foul sewers) water supply and wastewater treatment systems artificial navigation canals and impoundments (e.g. dams and reservoirs). Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Blockage / restriction Flooding of land due to a natural or artificial blockage or restriction of a conveyance channel or system. This mechanism of flooding could include the blockage of sewerage systems or due to restrictive channel structures such as bridges or culverts or arising from ice jams or landslides. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Characteristics of flooding The spatial temporal and/or physical properties of a flood event. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Debris flow A flood conveying a high degree of debris. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Deep flood A flood where the floodwaters are of significant depth. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Defence exceedance Flooding of land due to floodwaters overtopping flood defences. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Defence or infrastructural failure Flooding of land due to the failure of natural or artificial defences or infrastructure. This mechanism of flooding could include the breaching or collapse of a flood defence or retention structure or the failure in operation of pumping equipment or gates. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Flash flood A flood that rises and falls quite rapidly with little or no advance warning usually the result of intense rainfall over a relatively small area. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Flood Processes of inundation of usually dry (emerged) land or temporary covering by water of land not normally covered by water. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Fluvial Flooding of land by waters originating from part of a natural drainage system including natural or modified drainage channels. This source could include flooding from rivers streams drainage channels mountain torrents and ephemeral watercourses lakes and floods arising from snow melt. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Geological / hydrological Processes that have a geological (geosphere) or hydrological (hydrosphere) nature (or origin). Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Groundwater Flooding of land by waters from underground rising to above the land surface. This source could include rising groundwater and underground flow from elevated surface waters. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category High velocity flow A flood where the floodwaters are flowing at a high velocity. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Mechanism of flooding The prevailing technical or natural circumstances that lead to a flood event. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Medium onset flood An onset of flooding that occurs at a slower rate than a flash flood. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Natural exceedance Flooding of land by waters exceeding the capacity of their carrying channel or the level of adjacent lands. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Other characteristics of flooding Other characteristics or no special characteristics. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Other mechanism of flooding Flooding of land by water due to other mechanisms for instance wind setup floods. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Other rapid onset A flood which develops quickly other than a flash flood. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Other source of flooding Flooding of land by water due to other sources can include other tsunamis. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Pluvial Flooding of land directly from rainfall water falling on or flowing over the land. This source could include urban storm water rural overland flow or excess water or overland floods arising from snow melt. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Sea water Flooding of land by water from the sea estuaries or coastal lakes. This source could include flooding from the sea (e.g. extreme tidal level and / or storm surges) or arising from wave action or coastal tsunamis. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Slow onset flood A flood which takes a longer time to develop. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Snow melt flood Flooding due to rapid snow melt possibly in combination with rainfall or blockage due to ice jams. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category Source of flooding The origin of the hazardous water. Valid Data Dictionary Vocabularies Eionet Data Dictionary Natural Hazard Category