Marsh Grass for Coastal Flooding Mitigation

From Esri Environment: "Sea level rise is an ever-looming climate hazard facing the coastal communities of the United States. Communities big and small need easy-to-use tools for climate resilience planning and mitigation strategies. This layer shows coastal census tracts that are at risk from sea level rise and also are suitable for growing marsh grass and also have a high percentage of undeveloped land. Marsh grass is proven to stabilize shoreline and dampen wave energy during severe storm surges, and is an excellent choice for mitigating against damage from sea level rise. This layer should be used to identify and prioritize where to plant marsh grass. Marsh grasses provide significant shoreline stabilization and can also drastically dampen wave energy during severe storms. As sea levels rise due to global warming and climate change, planting marsh grasses will protect your community from shoreline erosion. Additionally, salt marshes are excellent habitats with high biodiversity, and as sea levels rise some of these marshes may soon be under water. To preserve the biodiversity in the area, planting additional marsh grasses ensures local wildlife will continue to have quality habitat. This layer displays census tracts that are ranked according to which would benefit most from planting marsh grasses. The ranking is based upon a composite index built with the following attributes: Percent of the Tract Area Predicted to be Below Sea Level by 2050 (%) Length of Marsh Grass Habitat (meters) Percent of the Tract Area that is Undeveloped (%) - Expressed as a percentage of the tract with landcover classified as anything other than “built-up”. These attribute links take you to the original data sources. Preprocessing was needed to prepare many of these inputs for inclusion in our index. The links are provided for reference only." Dates of Data The layer “Percent of Tract Area Predicted to be Below Sea Level by 2025” uses data from 2022. The layer “Length of Marsh Grass Habitat” uses data from 2018 and 2021. The layer “Percent of Tract Area that is Undeveloped” uses data from 2020.本数据集源自Esri：海平面上升是美国沿海社区正面临的日益迫近的气候灾害。无论规模大小，沿海社区都亟需易用的工具，以开展气候韧性规划与灾害减缓策略制定。本图层展示了同时满足以下三项条件的沿海人口普查区：面临海平面上升风险、适宜种植盐沼草（Marsh Grass）、未开发土地占比高。 研究证实，盐沼草能够稳定岸线并削弱强风暴潮期间的波浪能量，是减缓海平面上升引发损害的优质方案。本图层可用于识别并优先确定盐沼草的种植点位。盐沼草可显著稳定岸线，同时在强风暴期间大幅削弱波浪能量。随着全球变暖和气候变化导致海平面上升，种植盐沼草将保护社区免受海岸侵蚀。此外，盐沼（Salt Marshes）是生物多样性极高的优质栖息地，随着海平面上升，部分此类盐沼或将被海水淹没。为保护区域内的生物多样性，额外种植盐沼草可确保本地野生动物仍能拥有优质栖息环境。 本图层依据综合指数对人口普查区进行排名，以筛选出从盐沼草种植中获益最大的区域。该排名基于以下属性构建的综合指数得出： 1. 预计到2050年将处于海平面以下的普查区面积占比（%） 2. 盐沼草栖息地长度（米） 3. 未开发土地占普查区面积的比例（%）——即土地覆被分类为"建成区（built-up）"以外类型的区域占普查区总面积的百分比。 上述属性链接可跳转至原始数据源。为将这些输入数据纳入综合指数，需对大量数据进行预处理，相关链接仅供参考。 ### 数据日期 图层"预计到2025年将处于海平面以下的普查区面积占比"采用2022年采集的数据； 图层"盐沼草栖息地长度"采用2018年与2021年采集的数据； 图层"未开发土地占普查区面积的比例"采用2020年采集的数据。