Drainage of Leveed Areas in Mountainous Valleys

Various methods of disposing of the drainage from streams tributary to leveed areas are outlined in this paper. Brief consideration is given to the characteristics of these methods in fulfilling the design criterion that local drainage must be disposed of without causing damage appreciably greater than if the streams could flow unobstructed to the main river at low stage. The details of a method of analyzing local hydrology and developing capacities of drainage structures under various conditions are presented. Graphs show volumes and rates of rainfall and runoff used in the design storms and floods, and relations between selected capacities and available storage for numerous designs for drainage structures.