Mississippi and Illinois River Forest Canopy Gaps Data: MS Navigation Pools 8, 9, 13, 21, 24, 26, and IL River Alton Reach

As part of Upper Mississippi River Restoration (UMRR), the U.S. Army Corps of Engineers (USACE) is conducting a study to understand what environmental factors are contributing to the failure of floodplain forests to regenerate. This dataset uses lidar derivatives to identify broken forest canopy along the Mississippi River and Illinois River. A broken forest refers to an area that has a canopy height of greater than or equal to 10 meters. From this layer, forest canopy gaps can be identified by locating areas within the broken forest that have at least a 9.144 meter radius, or a 1-tree gap.

作为密西西比河上游修复（Upper Mississippi River Restoration，UMRR）项目的一部分，美国陆军工程兵团（U.S. Army Corps of Engineers，USACE）正开展一项研究，以明确导致泛滥平原森林自然更新失败的环境因素。本数据集借助激光雷达（LiDAR）衍生数据，识别密西西比河与伊利诺伊河沿岸的受损森林冠层。其中，受损森林指冠层高度大于或等于10米的区域。基于该衍生图层，可通过定位受损森林内半径不小于9.144米的区域，或单棵树木形成的林隙，识别森林冠层空隙。