Catchment‐scale river reconnection programmes require barrier inventories for restoration planning, yet barrier inventories are variable in extent and quality internationally. To test the degree to which barrier databases, in this case for England, are fit for purpose, we made a comparison of the national database (mostly originating from desk‐study) for two catchments, the Wear and the Tees, against detailed walkover surveys. We surveyed 701 km (32.8%) of stream length, stratified by stream order, altitude and subcatchment and recorded natural and artificial barriers. Only 22.7% of barriers identified in the walkover survey were present in the national database, including low‐head (<5 m) artificial structures (32.3% representation), artificial barriers ≥5 m (14.3% representation) and culverts (0% representation). About 18.9% of artificial barriers in the national database were found, during a field survey, to have been breached naturally. Mean densities of artificial barriers were 0.68 barriers km−1 and 0.45 barriers km−1 in the Wear and Tees, respectively, significantly higher than in the national database. Stream connectivity restoration in England may be hampered by the incomplete national barrier inventory; we recommend careful checks of barrier inventories as they are developed internationally.

中文翻译：

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国家屏障清单是否适合河流连通性恢复需求？两个集水区的测试

流域规模的河流重新连接计划需要用于恢复规划的屏障清单，但国际上屏障清单的范围和质量各不相同。为了测试障碍数据库（在这种情况下为英格兰）适合的程度，我们对两个集水区（Wear 和 Tees）的国家数据库（主要来自案头研究）与详细的步行调查进行了比较. 我们调查了 701 公里（32.8%）的河流长度，按河流顺序、高度和子汇​​水面积分层，并记录了自然和人工障碍。在步行调查中确定的障碍中，只有 22.7% 的障碍存在于国家数据库中，包括低头 (<5 m) 人工结构（32.3% 的代表性）、≥5 m 的人工障碍（14.3% 的代表性）和涵洞（0% 的代表性） ）。大约 18。在实地调查中，国家数据库中 9% 的人工障碍被发现是自然突破的。Wear 和 Tee 中人工障碍的平均密度分别为 0.68 个障碍 km-1 和 0.45 个障碍 km-1，明显高于国家数据库中的密度。英格兰的河流连通性恢复可能会受到不完整的国家障碍清单的阻碍；我们建议仔细检查障碍库存，因为它们是国际开发的。