ABSTRACT Freshwater supply remains limited in West Africa due to lack of operational governance frameworks. In this study, the Water flow and balance Simulation Model (WaSiM) and the Soil and Water Assessment Tool (SWAT) were applied in the Ouriyori catchment (14.5 km2, Benin) to assess hydrological ecosystem services (HES) in terms of service flow and service capacity using the ecosystem accounting framework. The modelling exercises indicated satisfactory goodness-of-fit coefficients greater than 75% with an absolute bias of less than 25%. The HES capacity was in general higher than the HES flow for crop and household (surface/groundwater) water supplies, indicating that the catchment can potentially supply more water under optimal storage and management conditions. Positive and negative shifts in service capacities of crop water and household supplies were observed over the simulation period. These significant results can support sustainable interventions in securing water and food productions through increasing HES flow and capacity.

中文翻译：

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用于分析 Ouriyori 流域（贝宁）水平衡和与水相关的生态系统服务的多模型方法

摘要 由于缺乏运营治理框架，西非的淡水供应仍然有限。在这项研究中，水流和平衡模拟模型 (WaSiM) 和土壤和水评估工具 (SWAT) 被应用于 Ouriyori 流域（14.5 平方公里，贝宁），以评估水文生态系统服务 (HES) 的服务流量和使用生态系统核算框架的服务能力。建模练习显示出令人满意的拟合优度系数大于 75%，绝对偏差小于 25%。对于作物和家庭（地表水/地下水）供水，HES 容量一般高于 HES 流量，表明在最佳存储和管理条件下，集水区可能提供更多的水。在模拟期间观察到作物水和家庭供应服务能力的正负变化。这些重大成果可以支持通过增加 HES 流量和能力来确保水和粮食生产的可持续干预措施。