“…This uncertainty in precipitation changes complicates decisions in water storage infrastructure investment in the Ethiopian highlands (Block & Strzepek, ; Gashaw & Mahari, ), so that investigations of agriculture or infrastructure development in Ethiopia tend to consider a broad range of potential changes (Block, Souza Filho, Sun, & Kwon, ; Reis, Culver, Block, & McCartney, ; Shortridge & Guikema, ; Shortridge et al., ). Moreover, the unknowable future climate conditions undermine simple economic computations of water reservoir planning, making RDF essential to reservoir cost‐benefit analyses (Nassopoulos, Dumas, & Hallegatte, ). The growth rate in Ethiopia is currently around 8% per year, with a target GDP growth of 11% per year (The World Bank, ) ; the burgeoning yet uneven economy presents uncertainty in future value of potential investments.…”