1. Structural Safety: Larger dams are more resistant to the forces of water and can offer better protection against floods, overtopping, and other potential failures.
2. Water Storage Capacity: Building larger dams increases the storage capacity of reservoirs, which can be essential in areas where water resources are scarce or irregular. Larger reservoirs can store water during periods of high rainfall or melting snow and provide a reliable source of water during dry spells.
3. Hydropower Generation: Larger dams provide greater potential for hydropower generation. Utilizing the height of the dam and the resulting water pressure allows for more efficient turbine operations and higher power production.
4. Flood Control: Large dams help mitigate flood risks by controlling and regulating water flow. They can store excess water during heavy rains and release it gradually over a longer period, preventing sudden flooding downstream.
5. Multipurpose Benefits: Large dams often serve multiple purposes beyond water storage and power generation. They can provide recreational opportunities like boating, fishing, swimming, and hiking. They also support downstream ecosystems by maintaining stable river flows and improving water quality.
6. Longevity: Constructing substantial dams ensures longevity and resilience over the long term. Bigger structures withstand wear and tear, weather conditions, and other challenges, minimizing the risk of failure and the need for frequent repairs or replacements.
It's worth noting that not all dams are built very large, and their size depends on various factors, including the specific objectives of the project, site conditions, and economic considerations.
