NH Wildlife Action Plan 2025 - Aquatic Habitat (Rivers/Streams)

This dataset represents the results (9/30/2008) of the Northeastern Aquatic Habitat ClassificationSystem (NAHCS) GIS map for streams and rivers. This classification focused on mapping a stream habitat types across 13 northeastern states (ME, NH, VT, MA, CT, RI, NY, NJ, PA, MD, DC, DE, VA,WV). Stream and river centerlines were extracted from the USGS National Hydrography Dataset Plus (NH-Plus) 2006 1:100,000 data. These reaches were attributed and placed into classes representing their biopysical setting in terms of stream size, gradient, and geology, and expected natural water temperature regime. Please see the attribute descriptions for more information on the variable thresholds and the summary taxonomy. NH Fish and Game Department transferred the TNC attributes to the 1:24,000-scale high-resolution NHD data for New Hampshire. https://www.nhgeodata.unh.edu/datasets/NHGRANIT::new-hampshire-hydrography-dataset-flowline/about Aquatic habitat condition assessment and Important Fish Habitat attributes updated by NHFG April 2025.本数据集收录了2008年9月30日发布的东北水生栖息地分类系统（Northeastern Aquatic Habitat Classification System, NAHCS）面向溪流与江河的地理信息系统（GIS）制图成果。该分类工作旨在对美国东北部13个州（缅因州ME、新罕布什尔州NH、佛蒙特州VT、马萨诸塞州MA、康涅狄格州CT、罗德岛州RI、纽约州NY、新泽西州NJ、宾夕法尼亚州PA、马里兰州MD、哥伦比亚特区DC、特拉华州DE、弗吉尼亚州VA、西弗吉尼亚州WV）范围内的溪流栖息地类型开展系统性制图。 本数据集的溪流与江河中心线提取自美国地质调查局（United States Geological Survey, USGS）2006年发布的1:100000比例尺国家级水文数据集增强版（National Hydrography Dataset Plus, NH-Plus）。所有提取河段均被赋予属性特征，并被划分为不同类别，以表征其在溪流规模、河床坡度、地质背景与预期自然水温动态模式方面的生物物理生境特征。如需了解变量阈值与分类汇总体系的更多细节，请参阅配套的属性说明文档。 新罕布什尔州鱼类与野生动物部门（NH Fish and Game Department）已将大自然保护协会（The Nature Conservancy, TNC）的属性数据整合至新罕布什尔州1:24000比例尺的高分辨率国家水文数据集（NHD）中，相关详情链接为：https://www.nhgeodata.unh.edu/datasets/NHGRANIT::new-hampshire-hydrography-dataset-flowline/about。 2025年4月，新罕布什尔州鱼类与野生动物部门（NHFG）完成了水生栖息地状况评估与重要鱼类栖息地相关属性数据的更新工作。