Dams, road crossings, and water withdrawals extensively fragment rivers, and watersheds often contain hundreds or thousands of barriers, some of which no longer meet societal purposes. Accordingly, both conservationists and infrastructure managers are faced with the challenge of prioritizing barriers for repair, replacement, or removal. Candidate projects have been prioritized with dozens of methods, which span a wide range of spatial scales, data and analytical requirements, mathematical complexity, and capacity to reconcile multiple perspectives and objectives. We briefly review barrier prioritization methods from the perspective of a policy maker or manager who must balance realities of stochastic opportunities, conflicting priorities, and risk of infrastructure failure. After outlining common motivations for barrier prioritization, we present a menu of techniques ranging from large‐scale, quantitative assessments to reactive, local response to failures. By clarifying the appropriate domain for each approach, this review informs the selection of prioritization methods for restoring riverine connectivity.

中文翻译：

---

比较优先解决流连接障碍的方法

大坝，人行横道和取水量使河流广泛地支离破碎，流域通常包含成百上千个屏障，其中一些不再符合社会目的。因此，保护​​主义者和基础设施管理者都面临着优先安排维修，更换或清除障碍的挑战。候选项目已使用数十种方法确定了优先级，这些方法涵盖了广泛的空间范围，数据和分析要求，数学复杂性以及协调多种观点和目标的能力。我们从决策者或管理者的角度简要回顾了障碍优先级划分方法，他们必须平衡随机机会的现实，优先级冲突和基础设施故障的风险。在概述了障碍优先级的共同动机之后，我们提供了一系列的技术菜单，从大规模的定量评估到对故障的反应性，局部响应。通过阐明每种方法的适当领域，本次审查为恢复河流连通性的优先方法选择提供了信息。