Tchefuncte River Flood Map Files

Heavy rainfall occurred across Louisiana during March 8-19, 2016, as a result of a massive, slow-moving southward dip in the jet stream, which moved eastward across Mexico, then neared the Gulf Coast, funneling deep tropical moisture into parts of the Gulf States and the Mississippi River Valley. The storm caused major flooding in north-central Louisiana.Digital flood-inundation maps for a 32.4-mile reach within the community of Covington near the Tchefuncte River in Washington Parish and Tangipahoa Parish, LA was created by the U.S. Geological Survey (USGS) in cooperation with Federal Emergency Management Agency (FEMA) to support response and recovery operations following a March 8-19, 2016 flood event. The inundation maps depict estimates of the areal extent and depth of flooding corresponding to 24 high-water marks (HWM) identified and surveyed by the USGS following the flood event.2016年3月8日至19日，受一支规模庞大、移动缓慢的急流（jet stream）南折系统影响，美国路易斯安那州全域遭遇强降雨。该急流系统先向东途经墨西哥，随后逼近墨西哥湾沿岸，将深厚的热带水汽输送至墨西哥湾沿岸各州及密西西比河流域部分区域。本次风暴引发路易斯安那州中北部大面积洪涝灾害。为支援2016年3月8日至19日洪涝事件后的应急响应与灾后恢复工作，美国地质调查局（U.S. Geological Survey, USGS）联合美国联邦紧急事务管理局（Federal Emergency Management Agency, FEMA），针对路易斯安那州华盛顿堂区与坦吉帕霍阿堂区特谢富克特河附近卡温顿社区内一段32.4英里的河段，制作了数字洪水淹没地图。该地图展示了对应24处洪水痕迹标记（High-Water Mark, HWM）的洪水覆盖范围与水深估算值，这些标记均由USGS在洪涝事件后实地识别并勘测。