Inevitable evaporation and sedimentation will influence reservoir operational performance if the two fluxes have been ignored when sizing reservoir systems. While this is to be expected, very few studies have quantified this influence. This study has analysed the effects of evaporation and sedimentation on reservoirs operational performance. It used seven reservoirs in Yesilirmak Basin, Turkey as case studies. The Dams serve a variety of purposes including irrigation, domestic and industrial, hydropower generation and flood control. Performance with regard to meeting these needs was characterized using reliability (time-based and volume-based), resilience, vulnerability and sustainability. The results showed that while ignoring both the evaporation and sedimentation during planning does affect subsequent operational performance, the influence of evaporation was more significant. Possible reasons are provided for the outcome and ways by which both can be accommodated during planning analyses thus mitigating the operational effects are suggested.

如果在确定水库系统大小时忽略这两个通量，不可避免的蒸发和沉积将影响水库的运行性能。虽然这是意料之中的，但很少有研究量化这种影响。本研究分析了蒸发和沉积对水库运行性能的影响。它使用土耳其 Yesilirmak 盆地的七个水库作为案例研究。大坝有多种用途，包括灌溉、家庭和工业、水力发电和防洪。满足这些需求的绩效通过可靠性（基于时间和基于数量）、弹性、脆弱性和可持续性来表征。结果表明，虽然在规划过程中同时忽略蒸发和沉淀，但确实会影响后续的运营绩效，蒸发的影响更为显着。为结果提供了可能的原因，并建议了在规划分析期间可以兼顾两者的方法，从而减轻操作影响。