Why are large reservoirs not built near cities?

Large reservoirs are typically not built near cities due to concerns about land use, environmental impact, and potential flooding risks. Urban areas often have high population densities, making it challenging to find suitable locations that minimize displacement and ecological disruption. Additionally, the construction and maintenance of reservoirs can lead to water quality issues, which are particularly concerning in populated regions. Lastly, logistical and economic factors, such as the cost of infrastructure to transport water from remote reservoirs, often make it more feasible to develop water sources further from urban centers.