“…Additionally, the reliability and economic feasibility of urban rainwater harvesting were conducted in six cities [ 22 ] and the coastal area [ 42 ]. The optimum location for establishing RWH systems in different parts of Bangladesh was investigated as well [ 21 , 43 , 44 ]. However, most prior studies [ [23] , [24] , [25] , 39 , 45 ] have concentrated on existing household rainwater harvesters.…”