ANS:A - 1 to 4

A side slope of 1 to 4 indicates the ratio of horizontal distance to vertical distance in a structure or feature. Specifically, it implies that for every 1 unit of horizontal distance, there are 4 units of vertical distance. In the context of hydraulic engineering or civil engineering, a side slope of 1 to 4 is often used in various applications such as embankments, slopes, or channels. Here's an explanation of how it's typically applied:

1. Embankments: In road construction or water management projects, embankments are built to raise the level of the ground or to contain water. A side slope of 1 to 4 means that for every 1 meter of horizontal distance, the embankment rises 4 meters vertically.
2. Slopes: In landscaping or erosion control, slopes are often built to prevent soil erosion or to enhance the aesthetic appearance of the terrain. A side slope of 1 to 4 means that the slope ascends 4 units vertically for every 1 unit horizontally.
3. Channels: In the context of channels or waterways, a 1 to 4 side slope might be used to design the banks of a river or canal. This slope helps to stabilize the channel banks and prevent erosion while providing access for maintenance.