<descriptor thcode="61"><thesaurus thcode="61" name="Marine Realms Information Bank (MRIB) keywords" scope="Theme keywords from the former Marine Realms Information Bank, focusing on characteristics of coasts and oceans, processes acting on them, and human concerns about them." creator="U.S. Geological Survey" rights="Public domain" date="2016-09-07" codetype="number" prefix="mrib" tblname="mrib" nonpref="mribnp" relterm="mribrt" root_code="1" contact="aallwardt"><category><term thcode="25" code="27" name="types" parent="26" scope="Terms are types of things rather than named instances"/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="13" name="transitive" parent="12" scope="Narrower terms have an &quot;is a&quot; relationship with their broader terms, and generally can be described as part-of, type-of, or instance-of the broader term."/><term thcode="25" code="5" name="theme" parent="2" scope="Terms indicate domains of human concern, such as scientific discipline, societal problems, or characteristics of earth, space, oceans, and living things."/><term thcode="25" code="21" name="disciplines" parent="2" scope="Broad categories of human inquiry or activity, such as scientific disciplines."/><term thcode="25" code="20" name="methods" parent="2" scope="Actions taken to obtain or analyze information"/><term thcode="25" code="27" name="types" parent="26" scope="Terms are types of things rather than named instances"/><term thcode="25" code="16" name="hierarchical" parent="11" scope="Substantive broader-narrower relationships exist among the terms."/><term thcode="25" code="13" name="transitive" parent="12" scope="Narrower terms have an &quot;is a&quot; relationship with their broader terms, and generally can be described as part-of, type-of, or instance-of the broader term."/><term thcode="25" code="5" name="theme" parent="2" scope="Terms indicate domains of human concern, such as scientific discipline, societal problems, or characteristics of earth, space, oceans, and living things."/><term thcode="25" code="21" name="disciplines" parent="2" scope="Broad categories of human inquiry or activity, such as scientific disciplines."/><term thcode="25" code="20" name="methods" parent="2" scope="Actions taken to obtain or analyze information"/></category><altlabel><altlabel>MRIB keywords</altlabel><altlabel>MRIB keywords</altlabel><altlabel>Marine Realms Information Bank keywords</altlabel><altlabel>Marine Realms Information Bank keywords</altlabel></altlabel></thesaurus><term thcode="61" code="339" name="storm erosion" parent="334" scope="the loss of earth materials due to flooding, winds, or other transport by an extreme storm such as a hurricane, particularly in coastal areas."/><bt><term thcode="61" code="334" name="erosion" parent="323" scope="the natural removal of earth materials from any part of the Earth's surface (subaerial or submarine), with an emphasis on the consequences for humans and infrastructure."/><term thcode="61" code="323" name="hazards and disasters" parent="268" scope="used for natural hazards, the risks they pose to society, and the destructive events that may result."/><term thcode="61" code="268" name="hot topics" parent="1"/><term thcode="61" code="1" name="Marine Realms Information Bank (MRIB) keyword categories"/></bt><nt><term thcode="61" code="340" name="catastrophic storm erosion" parent="339" scope="the loss of earth materials due to a single extreme storm, typically in coastal areas."/><term thcode="61" code="341" name="chronic storm erosion" parent="339" scope="the loss of earth materials due to a series of storms, (possibly over a prolonged period of time), particularly in coastal areas."/></nt><rt><term thcode="61" code="335" name="beach erosion" parent="334" scope="used specifically for beach erosion that impacts human activities and infrastructure."/><term thcode="61" code="336" name="coastal erosion" parent="334" scope="the erosion of the area adjacent to an ocean, sea, or lake, often resulting in shoreline changes."/><term thcode="61" code="355" name="storm disasters" parent="323" scope="a storm that causes loss of life, property, or natural resources."/></rt></descriptor>