Example: Questions to be asked before a water structure, such as a dam, can be designed How much water will the dam have to retain? At what rate will settlement of silt reduce reservoir capacity? When should water be released for flood control stream augmentation or recreational use? Will undesirable plant growth be stimulated by the impounded water? What is the expected benefit of recreational facilities? How will have land submerged by reservoirs affect local residents?Example: Example: Questions to be asked before a water Questions to be asked before a water structure, such as a dam, can be designed structure, such as a dam, can be designed – ¾ How much water will the dam have to retain? ¾ At what rate will settlement of silt reduce reservoir capacity? ¾ When should water be released for flood control, stream augmentation, or recreational use? ¾ Will undesirable plant growth be stimulated by the impounded water? ¾ What is the expected benefit of recreational facilities? ¾ How will have land submerged by reservoirs affect local residents?