Prioritizing projects to improve cost‐effectiveness has become a common practice in natural resources management, especially in selecting sites for river restoration work. Previous studies for prioritizing road–stream crossing upgrade projects focused on either restoring river connectivity or reducing sedimentation, even though crossings can affect connectivity and sedimentation simultaneously. In this study, we simulated site selection to maximize the improvement of connectivity restoration and sedimentation reduction of three prioritization schemes targeting (a) river connectivity, (b) erosion risk, or (c) both objectives concurrently and compared the results. Furthermore, we examined the relationships between the cost‐effectiveness of prioritizations and watershed characteristics. We found significant differences among the effectiveness of prioritization objectives; thus, trade‐offs should be taken into consideration when prioritizing crossings. The incorporation of spatial interdependency among crossings and weighting objectives could significantly change the cost‐effectiveness. We also found that splitting the budget and using a portion to individually prioritize each objective could be more cost‐effective than using the whole budget to achieve concurrent objectives. Watershed characteristics like size and connectivity‐ and sedimentation‐related factors could be used to help identify effective management for both connectivity restoration and sedimentation control.

中文翻译：

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基于连通性恢复和侵蚀风险控制的路口交叉口升级优先级之间的权衡

优先考虑提高成本效益的项目已成为自然资源管理中的普遍做法，尤其是在选择河流恢复工作的地点时。先前的优先研究公路—河流交叉口升级项目的研究都集中在恢复河流连通性或减少沉积物上，即使交叉口会同时影响连通性和沉积物。在这项研究中，我们模拟了选址，以最大程度地提高针对（a）河流连通性，（b）侵蚀风险或（c）同时达到两个目标的三个优先方案的连通性恢复和减少沉降的效果，并比较了结果。此外，我们研究了优先次序的成本效益与分水岭特征之间的关系。我们发现优先目标的有效性之间存在重大差异；因此，在对交叉点进行优先排序时，应考虑折衷。交叉口和加权目标之间空间相互依存的结合可以显着改变成本效益。我们还发现，与使用全部预算来实现并发目标相比，分割预算并使用一部分来分别确定每个目标的优先级可能更具成本效益。流域特征（如大小，连通性和与沉积有关的因素）可用于帮助确定有效的管理，以恢复连通性和控制沉积。交叉口和加权目标之间空间相互依存的结合可以显着改变成本效益。我们还发现，与使用全部预算来实现并发目标相比，分割预算并使用一部分来分别确定每个目标的优先级可能更具成本效益。流域特征（如大小，连通性和与沉积有关的因素）可用于帮助确定有效的管理，以恢复连通性和控制沉积。交叉口和加权目标之间空间相互依存的结合可以显着改变成本效益。我们还发现，与使用全部预算来实现并发目标相比，分割预算并使用一部分来分别确定每个目标的优先级可能更具成本效益。流域特征（如大小，连通性和与沉积有关的因素）可用于帮助确定有效的管理，以恢复连通性和控制沉积。