When installing a pipe slope drain in an earth dike, the height of the dike must be at least how many times the pipe diameter?

The height of the dike must be at least two times the diameter of the pipe to ensure proper function and stability. This ratio is essential because it provides adequate support and structural integrity to manage the flow of water effectively. When the dike height is sufficient, it helps prevent undermining or erosion around the pipe, ensuring that water is directed appropriately through the drain rather than eroding the surrounding soil.

This measure is also crucial in preventing potential failure of the dike during heavy rain events or when the pipe is under high flow conditions. A dike that meets this height requirement helps maintain a stable channel for drainage while minimizing the risk of sediment-laden water escaping and causing erosion or sedimentation in unwanted areas. In summary, maintaining this height-to-diameter ratio is key for effective erosion and sediment control practices.