Forested Riparian Buffer Duck River Watershed

Overview This layer was created using the Flowlines and Waterbodies layers for the Upper and Lower Duck River watersheds from the National Hydrography Dataset Plus (https://www.epa.gov/waterdata/nhdplus-national-hydrography-dataset-plus). A 300 ft buffer was created around each stream and river using the “buffer” tool in ArcGIS pro. This buffer layer was then overlayed with a forest cover layer extracted from the National Land Cover Database (https://www.usgs.gov/centers/eros/science/annual-national-land-cover-database) using the “Summararize within” tool in ArcGIS pro. The resulting feature layer provides percent forest cover for the riparian buffers at the level of stream reach code. Feature Layer Riparian_Forest_Duck_Joined represents buffered stream segments and the summarized forested area associated with each segment. The layer supports evaluation of forest cover within riparian zones and includes attributes that describe watershed, hydrologic, and summary calculations related to stream reaches. Geographic Coverage The service covers the Upper and Lower Duck River watersheds within the SCTDD region. Use Cases Measuring forested riparian buffer coverage along streams and rivers Supporting watershed and water quality assessments Reviewing stream corridor conditions for conservation and planning Summarizing riparian forest extent by reach or buffer segment### 概述 本图层基于美国国家水文数据集增强版（National Hydrography Dataset Plus，https://www.epa.gov/waterdata/nhdplus-national-hydrography-dataset-plus）提供的上达克河与下达克河流域流线（Flowlines）和水体（Waterbodies）图层制作而成。使用ArcGIS Pro中的缓冲区工具（Buffer）为每条溪流与河流创建了300英尺的缓冲区。随后，借助ArcGIS Pro中的范围内汇总工具（Summarize Within），将该缓冲区图层与从美国国家土地覆盖数据库（National Land Cover Database，https://www.usgs.gov/centers/eros/science/annual-national-land-cover-database）提取的森林覆盖图层进行叠加分析。最终生成的要素图层（Feature Layer）可基于河段编码提供河岸缓冲区的森林覆盖百分比数据。 要素图层Riparian_Forest_Duck_Joined代表经过缓冲区处理的河段，以及各河段关联的汇总森林覆盖面积。该图层可用于评估河岸带内的森林覆盖情况，同时包含描述流域、水文特征以及与河段相关的汇总计算结果的属性字段。 ### 地理覆盖范围 本服务覆盖SCTDD区域内的上达克河与下达克河流域。 ### 应用场景 - 沿溪流与河流测算林木覆盖的河岸缓冲区覆盖率 - 辅助流域与水质评估工作 - 审查河流廊道状况以支撑保护与规划工作 - 按河段或缓冲区分段汇总河岸森林覆盖范围