Encroachment 2 : Construction, placement of fill, or similar alteration of topography in the floodplain that reduces the area available to convey floodwaters
Department of Homeland Security, Federal Emergency Management Agency (FEMA), Levees: Identifying the Risk, Glossary: Frequently Used Terms for Levee Systems, Washington DC, USA 2008. http://www.fema.gov/media-library-data/20130726-15 54-20490-4604/lv_gloss.pdf, (Dam Sfty - Amer) {892}