We discuss the prioritization of river reaches to be selected for restoration measures under the constraints of financial resource limitation. We propose and apply a simple approach based on the quantification of major hydro‐morphological alterations and the critical comparison with locally proposed restoration actions. The available hydro‐morphological and ecological data for the approach do not go beyond the requirements posed by the implementation of the EU Water Framework and Floods Directives. We describe an example that refers to a heavily regulated Alpine river (Sarca River, NE Italy). The results indicate hydropower facilities as a key source of hydrological alteration, with sediment retention and grade control structures on lateral tributaries playing an additional relevant role in reducing sediment supply. The frequency and duration of sediment‐transporting floods have dramatically decreased, and the bed sediment composition has been markedly altered and become highly compacted. Habitat improvement has been achieved after the implementation of minimum environmental flows. The comparison between the results of the hydro‐morphological indicators and the locally proposed restoration actions highlights that reaches with lower degree of hydro‐morphological alterations do not coincide with the areas chosen for the locally planned actions, which often miss considerations of the relevant spatial scales. In a context of limited available financial resources and data compared to other flagship river restoration projects in the European Alps, the present work suggests viable options for the choice of target restoration reaches.

中文翻译：

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优先考虑在受监管的高山河流中进行恢复的河段：本地驱动与基于水文形态的行动

我们讨论了在财政资源有限的约束下要选择的河段优先次序来进行恢复措施。我们提出并应用一种简单的方法，该方法基于对主要水文形态变化的量化以及与当地提出的修复措施的关键比较。该方法的可用水文形态学和生态学数据不会超出欧盟水框架和洪水指令的实施所提出的要求。我们描述了一个示例，该示例引用了受到严格管制的高山河（意大利东北萨卡河）。结果表明，水电设施是水文变化的主要来源，侧支流上的沉积物保留和坡度控制结构在减少沉积物供应方面还具有其他相关作用。泥沙输送洪水的频率和持续时间大大减少，河床泥沙成分已发生明显变化并变得高度致密。实施最低限度的环境流量后，人居环境得到了改善。水文形态指标结果与当地提议的恢复措施之间的比较表明，水文形态变化程度较低的地区与为当地计划的措施选择的区域并不吻合，而这些地区往往没有考虑相关的空间尺度。与欧洲阿尔卑斯山的其他旗舰河道修复项目相比，在可用资金和数据有限的情况下，本工作提出了选择目标修复河段的可行方案。