An Unmanned Aerial Vehicle (UAV) supply chain architecture is used to handle flood water leak incidents occurred by physical disasters in Smart Cities (SCs). Floods produce serious problems and inefficiencies in problematic sectors of water grid. Such incidents are treated as a supply chain problem, where each incident is assigned to a certain priority. On a trigger occurrence the nearest UAV reaches a certain flood water leak incident where the assigned plumber at the SC control system assesses the problem. SC personnel evaluate if it is a high significance incident to fix the problem in real time. In this paper, there are presented certain use cases, which are evaluated with proposed metrics incorporated by control system supply chain architecture to infer the optimum use case for SC recovery. Such a use case is proposed to be adopted by SC control system architecture to handle upcoming scenarios of flood physical disasters.