Ecosystem-based disaster risk reduction (Eco-DRR) measures are gaining attention as creative solutions to reduce community vulnerability against risks while providing multiple co-benefits. We evaluate an Eco-DRR, an afforestation effort, Boca de Sapo (hereafter, BdS), in a marginalized community in peri-urban Lima where we perform household surveys and key informant interviews. To estimate the economic viability, we design a benefit-cost analysis (BCA) and include probabilistically estimated DRR benefits and place-based economic and non-market co-benefits representing stakeholder values. Accounting for income differences, we incorporate equity weights to estimate social welfare benefits. We then evaluate BdS impacts based on BCA results and stakeholder responses along broader sustainability dimensions, and benchmark the project's contribution to urban sustainability using two international frameworks. Household surveys revealed high concern for rockfall risk, and a double-bounded contingent valuation indicated an average household willingness to pay (WTP) of $3.44 ± 0.49/month for BdS maintenance. The equity-weighted risk-based BCA using Monte Carlo simulations indicated BdS was unviable considering DRR benefits with a Benefit-Cost Ratio (BCR) of 0.06 ± 0.08. BCR estimates increased to 1.18 ± 0.42 with incremental integration of tangible property rights co-benefits, and to 1.70 ± 0.59 with addition of WTP representing non-market co-benefits. Our findings demonstrate that inclusion of the multiple Eco-DRR place-based, socio-cultural, and ecological co-benefits with primary DRR benefits is critical as they generate substantial wellbeing impacts for communities. Adapting a sustainability lens revealed holistic Eco-DRR outcomes including access to public green spaces, social inclusion, stronger resource governance, and health and wellbeing benefits, highlighting areas for improvement and pathways for adaptive governance.

基于生态系统的减少灾害风险 (Eco-DRR) 措施作为创造性的解决方案正在受到关注，以减少社区对风险的脆弱性，同时提供多种共同利益。我们评估 Eco-DRR、植树造林工作、Boca de Sapo（以下简称 BdS），在利马郊区的一个边缘化社区，我们进行家庭调查和关键线人访谈。为了估计经济可行性，我们设计了收益成本分析 (BCA)，并包括概率估计的 DRR 收益以及代表利益相关者价值的基于地点的经济和非市场共同收益。考虑到收入差异，我们结合权益权重来估计社会福利。然后，我们根据 BCA 结果和利益相关者在更广泛的可持续性维度上的反应评估 BdS 影响，并使用两个国际框架来衡量项目对城市可持续性的贡献。家庭调查显示对落石风险的高度关注，双界或有估值表明家庭平均支付意愿 (WTP) 为 3.44 ± 0 美元。BdS 维护 49/月。使用蒙特卡洛模拟的基于权益加权风险的 BCA 表明，考虑到 DRR 收益，BdS 是不可行的，收益成本比 (BCR) 为 0.06 ± 0.08。BCR 估计值随着有形产权共同利益的逐步整合而增加到 1.18 ± 0.42，并且随着代表非市场共同利益的 WTP 的增加而增加到 1.70 ± 0.59。我们的研究结果表明，将基于地方的多种 Eco-DRR、社会文化和生态协同效益与主要的 DRR 效益相结合是至关重要的，因为它们会对社区产生重大的福祉影响。采用可持续发展的视角揭示了整体的 Eco-DRR 成果，包括获得公共绿色空间、社会包容、更强有力的资源治理以及健康和福祉效益，